diff --git a/13.js-mapping/clustering.png b/13.js-mapping/clustering.png
new file mode 100644
index 0000000..415ea3c
Binary files /dev/null and b/13.js-mapping/clustering.png differ
diff --git a/13.js-mapping/d3.html b/13.js-mapping/d3.html
index 22d0be9..903e779 100644
--- a/13.js-mapping/d3.html
+++ b/13.js-mapping/d3.html
@@ -45,7 +45,7 @@
         Finland: 5,
         Sweden: 5,
         Cyprus: 6,
-        "Czech Republic": 6,
+        Czechia: 6,
         Estonia: 6,
         Hungary: 6,
         Latvia: 6,
@@ -90,10 +90,12 @@
         .geoMercator()
         //.geoConicEqualArea()
         .center([15, 54])
-        .scale(600)
+        .scale(700)
         .translate([width / 2, height / 2]);
       const path = d3.geoPath().projection(projection);
 
+      let globalData = null;
+
       // load TopoJSON
       d3.json(
         // DEMO change to 110m/10m
@@ -106,6 +108,7 @@
         const europeCountries = geojson.features.filter(
           (d) => euMemberStates[d.properties.name] !== undefined,
         );
+        console.log(europeCountries);
 
         svg
           .selectAll("path")
diff --git a/13.js-mapping/leaflet.html b/13.js-mapping/leaflet.html
index fc1a548..fea1413 100644
--- a/13.js-mapping/leaflet.html
+++ b/13.js-mapping/leaflet.html
@@ -42,14 +42,15 @@ https://leafletjs.com/examples.html
       const initialZoom = 12;
       // Leaflet makes a global variable "L" available.
       // this creates a map in the div above
-      const map = L.map("map-goes-here").setView(chicago, initialZoom);
+      const map = L.map("map-goes-here");
+      map.setView(chicago, initialZoom);
 
       // OSM base layer
       // DEMO change of base layer
       const watercolorURL =
         "https://tiles.stadiamaps.com/tiles/stamen_watercolor/{z}/{x}/{y}.jpg";
       const osmURL = "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png";
-      L.tileLayer(osmURL, {
+      L.tileLayer(watercolorURL, {
         maxZoom: 19,
         attribution: "© OpenStreetMap contributors",
       }).addTo(map);
diff --git a/13.js-mapping/maplibre.html b/13.js-mapping/maplibre.html
index 743d93a..fce01d8 100644
--- a/13.js-mapping/maplibre.html
+++ b/13.js-mapping/maplibre.html
@@ -67,7 +67,7 @@
         zoom: 12,
         style: tileJSON,
         // DEMO toggle style
-        style: watercolor,
+        //style: watercolor,
       });
 
       const points = [
diff --git a/13.js-mapping/slides.html b/13.js-mapping/slides.html
index 8f0f4f5..7807897 100644
--- a/13.js-mapping/slides.html
+++ b/13.js-mapping/slides.html
@@ -8,35 +8,35 @@
  * @size 16:9 1280px 720px
  * @size 4:3 960px 720px
  */div#\:\$p > svg > foreignObject > section{--base-size-4:calc(var(--marpit-root-font-size, 1rem) * 0.25);--base-size-8:calc(var(--marpit-root-font-size, 1rem) * 0.5);--base-size-16:calc(var(--marpit-root-font-size, 1rem) * 1);--base-text-weight-normal:400;--base-text-weight-medium:500;--base-text-weight-semibold:600;--fontStack-monospace:ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;}div#\:\$p > svg > foreignObject > section [data-theme=light],div#\:\$p > svg > foreignObject > section{color-scheme:light;--focus-outlineColor:#0969da;--fgColor-default:#1f2328;--fgColor-muted:#636c76;--fgColor-accent:#0969da;--fgColor-success:#1a7f37;--fgColor-attention:#9a6700;--fgColor-danger:#d1242f;--fgColor-done:#8250df;--bgColor-default:#fff;--bgColor-muted:#f6f8fa;--bgColor-neutral-muted:#afb8c133;--bgColor-attention-muted:#fff8c5;--borderColor-default:#d0d7de;--borderColor-muted:#d0d7deb3;--borderColor-neutral-muted:#afb8c133;--borderColor-accent-emphasis:#0969da;--borderColor-success-emphasis:#1a7f37;--borderColor-attention-emphasis:#bf8700;--borderColor-danger-emphasis:#cf222e;--borderColor-done-emphasis:#8250df;--color-prettylights-syntax-comment:#57606a;--color-prettylights-syntax-constant:#0550ae;--color-prettylights-syntax-constant-other-reference-link:#0a3069;--color-prettylights-syntax-entity:#6639ba;--color-prettylights-syntax-storage-modifier-import:#24292f;--color-prettylights-syntax-entity-tag:#0550ae;--color-prettylights-syntax-keyword:#cf222e;--color-prettylights-syntax-string:#0a3069;--color-prettylights-syntax-variable:#953800;--color-prettylights-syntax-brackethighlighter-unmatched:#82071e;--color-prettylights-syntax-brackethighlighter-angle:#57606a;--color-prettylights-syntax-invalid-illegal-text:#f6f8fa;--color-prettylights-syntax-invalid-illegal-bg:#82071e;--color-prettylights-syntax-carriage-return-text:#f6f8fa;--color-prettylights-syntax-carriage-return-bg:#cf222e;--color-prettylights-syntax-string-regexp:#116329;--color-prettylights-syntax-markup-list:#3b2300;--color-prettylights-syntax-markup-heading:#0550ae;--color-prettylights-syntax-markup-italic:#24292f;--color-prettylights-syntax-markup-bold:#24292f;--color-prettylights-syntax-markup-deleted-text:#82071e;--color-prettylights-syntax-markup-deleted-bg:#ffebe9;--color-prettylights-syntax-markup-inserted-text:#116329;--color-prettylights-syntax-markup-inserted-bg:#dafbe1;--color-prettylights-syntax-markup-changed-text:#953800;--color-prettylights-syntax-markup-changed-bg:#ffd8b5;--color-prettylights-syntax-markup-ignored-text:#eaeef2;--color-prettylights-syntax-markup-ignored-bg:#0550ae;--color-prettylights-syntax-meta-diff-range:#8250df;--color-prettylights-syntax-sublimelinter-gutter-mark:#8c959f;}div#\:\$p > svg > foreignObject > section [data-theme=dark],div#\:\$p > svg > foreignObject > section:where(.invert){color-scheme:dark;--focus-outlineColor:#1f6feb;--fgColor-default:#e6edf3;--fgColor-muted:#8d96a0;--fgColor-accent:#4493f8;--fgColor-success:#3fb950;--fgColor-attention:#d29922;--fgColor-danger:#f85149;--fgColor-done:#ab7df8;--bgColor-default:#0d1117;--bgColor-muted:#161b22;--bgColor-neutral-muted:#6e768166;--bgColor-attention-muted:#bb800926;--borderColor-default:#30363d;--borderColor-muted:#30363db3;--borderColor-neutral-muted:#6e768166;--borderColor-accent-emphasis:#1f6feb;--borderColor-success-emphasis:#238636;--borderColor-attention-emphasis:#9e6a03;--borderColor-danger-emphasis:#da3633;--borderColor-done-emphasis:#8957e5;--color-prettylights-syntax-comment:#8b949e;--color-prettylights-syntax-constant:#79c0ff;--color-prettylights-syntax-constant-other-reference-link:#a5d6ff;--color-prettylights-syntax-entity:#d2a8ff;--color-prettylights-syntax-storage-modifier-import:#c9d1d9;--color-prettylights-syntax-entity-tag:#7ee787;--color-prettylights-syntax-keyword:#ff7b72;--color-prettylights-syntax-string:#a5d6ff;--color-prettylights-syntax-variable:#ffa657;--color-prettylights-syntax-brackethighlighter-unmatched:#f85149;--color-prettylights-syntax-brackethighlighter-angle:#8b949e;--color-prettylights-syntax-invalid-illegal-text:#f0f6fc;--color-prettylights-syntax-invalid-illegal-bg:#8e1519;--color-prettylights-syntax-carriage-return-text:#f0f6fc;--color-prettylights-syntax-carriage-return-bg:#b62324;--color-prettylights-syntax-string-regexp:#7ee787;--color-prettylights-syntax-markup-list:#f2cc60;--color-prettylights-syntax-markup-heading:#1f6feb;--color-prettylights-syntax-markup-italic:#c9d1d9;--color-prettylights-syntax-markup-bold:#c9d1d9;--color-prettylights-syntax-markup-deleted-text:#ffdcd7;--color-prettylights-syntax-markup-deleted-bg:#67060c;--color-prettylights-syntax-markup-inserted-text:#aff5b4;--color-prettylights-syntax-markup-inserted-bg:#033a16;--color-prettylights-syntax-markup-changed-text:#ffdfb6;--color-prettylights-syntax-markup-changed-bg:#5a1e02;--color-prettylights-syntax-markup-ignored-text:#c9d1d9;--color-prettylights-syntax-markup-ignored-bg:#1158c7;--color-prettylights-syntax-meta-diff-range:#d2a8ff;--color-prettylights-syntax-sublimelinter-gutter-mark:#484f58;}div#\:\$p > svg > foreignObject > section{-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%;background-color:var(--bgColor-default);color:var(--fgColor-default);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji;font-size:16px;line-height:1.5;margin:0;word-wrap:break-word;scroll-behavior:auto}div#\:\$p > svg > foreignObject > section{--marpit-root-font-size:16px;}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1):hover .anchor .octicon-link:before,div#\:\$p > svg > foreignObject > section :is(h2, marp-h2):hover .anchor .octicon-link:before,div#\:\$p > svg > foreignObject > section :is(h3, marp-h3):hover .anchor .octicon-link:before,div#\:\$p > svg > foreignObject > section :is(h4, marp-h4):hover .anchor .octicon-link:before,div#\:\$p > svg > foreignObject > section :is(h5, marp-h5):hover .anchor .octicon-link:before,div#\:\$p > svg > foreignObject > section :is(h6, marp-h6):hover .anchor .octicon-link:before{background-color:currentColor;content:" ";display:inline-block;height:16px;-webkit-mask-image:url('data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" viewBox="0 0 16 16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 0 0 1.06 1.06l1.25-1.25a2 2 0 1 1 2.83 2.83l-2.5 2.5a2 2 0 0 1-2.83 0 .75.75 0 0 0-1.06 1.06 3.5 3.5 0 0 0 4.95 0l2.5-2.5a3.5 3.5 0 0 0-4.95-4.95zm-4.69 9.64a2 2 0 0 1 0-2.83l2.5-2.5a2 2 0 0 1 2.83 0 .75.75 0 0 0 1.06-1.06 3.5 3.5 0 0 0-4.95 0l-2.5 2.5a3.5 3.5 0 0 0 4.95 4.95l1.25-1.25a.75.75 0 0 0-1.06-1.06l-1.25 1.25a2 2 0 0 1-2.83 0"/></svg>');mask-image:url('data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" viewBox="0 0 16 16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 0 0 1.06 1.06l1.25-1.25a2 2 0 1 1 2.83 2.83l-2.5 2.5a2 2 0 0 1-2.83 0 .75.75 0 0 0-1.06 1.06 3.5 3.5 0 0 0 4.95 0l2.5-2.5a3.5 3.5 0 0 0-4.95-4.95zm-4.69 9.64a2 2 0 0 1 0-2.83l2.5-2.5a2 2 0 0 1 2.83 0 .75.75 0 0 0 1.06-1.06 3.5 3.5 0 0 0-4.95 0l-2.5 2.5a3.5 3.5 0 0 0 4.95 4.95l1.25-1.25a.75.75 0 0 0-1.06-1.06l-1.25 1.25a2 2 0 0 1-2.83 0"/></svg>');width:16px}div#\:\$p > svg > foreignObject > section details,div#\:\$p > svg > foreignObject > section figcaption,div#\:\$p > svg > foreignObject > section figure{display:block}div#\:\$p > svg > foreignObject > section summary{display:list-item}div#\:\$p > svg > foreignObject > section [hidden]{display:none!important}div#\:\$p > svg > foreignObject > section a{background-color:transparent;color:var(--fgColor-accent);text-decoration:none}div#\:\$p > svg > foreignObject > section abbr[title]{border-bottom:none;-webkit-text-decoration:underline dotted;text-decoration:underline dotted}div#\:\$p > svg > foreignObject > section b,div#\:\$p > svg > foreignObject > section strong{font-weight:var(--base-text-weight-semibold, 600)}div#\:\$p > svg > foreignObject > section dfn{font-style:italic}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1){border-bottom:1px solid var(--borderColor-muted);font-size:2em;font-weight:var(--base-text-weight-semibold, 600);margin:.67em 0;padding-bottom:.3em}div#\:\$p > svg > foreignObject > section mark{background-color:var(--bgColor-attention-muted);color:var(--fgColor-default)}div#\:\$p > svg > foreignObject > section small{font-size:90%}div#\:\$p > svg > foreignObject > section sub,div#\:\$p > svg > foreignObject > section sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}div#\:\$p > svg > foreignObject > section sub{bottom:-.25em}div#\:\$p > svg > foreignObject > section sup{top:-.5em}div#\:\$p > svg > foreignObject > section img{background-color:var(--bgColor-default);border-style:none;box-sizing:content-box;max-width:100%}div#\:\$p > svg > foreignObject > section code,div#\:\$p > svg > foreignObject > section kbd,div#\:\$p > svg > foreignObject > section :is(pre, marp-pre),div#\:\$p > svg > foreignObject > section samp{font-family:monospace;font-size:1em}div#\:\$p > svg > foreignObject > section figure{margin:1em 40px}div#\:\$p > svg > foreignObject > section hr{background:transparent;background-color:var(--borderColor-default);border:0;box-sizing:content-box;height:.25em;margin:24px 0;overflow:hidden;padding:0}div#\:\$p > svg > foreignObject > section input{font:inherit;font-family:inherit;font-size:inherit;line-height:inherit;margin:0;overflow:visible}div#\:\$p > svg > foreignObject > section [type=button],div#\:\$p > svg > foreignObject > section [type=reset],div#\:\$p > svg > foreignObject > section [type=submit]{-webkit-appearance:button;-moz-appearance:button;appearance:button}div#\:\$p > svg > foreignObject > section [type=checkbox],div#\:\$p > svg > foreignObject > section [type=radio]{box-sizing:border-box;padding:0}div#\:\$p > svg > foreignObject > section [type=number]::-webkit-inner-spin-button,div#\:\$p > svg > foreignObject > section [type=number]::-webkit-outer-spin-button{height:auto}div#\:\$p > svg > foreignObject > section [type=search]::-webkit-search-cancel-button,div#\:\$p > svg > foreignObject > section [type=search]::-webkit-search-decoration{-webkit-appearance:none;appearance:none}div#\:\$p > svg > foreignObject > section ::-webkit-input-placeholder{color:inherit;opacity:.54}div#\:\$p > svg > foreignObject > section ::-webkit-file-upload-button{-webkit-appearance:button;appearance:button;font:inherit}div#\:\$p > svg > foreignObject > section a:hover{text-decoration:underline}div#\:\$p > svg > foreignObject > section ::-moz-placeholder{color:var(--fgColor-muted);opacity:1}div#\:\$p > svg > foreignObject > section ::placeholder{color:var(--fgColor-muted);opacity:1}div#\:\$p > svg > foreignObject > section hr:after,div#\:\$p > svg > foreignObject > section hr:before{content:"";display:table}div#\:\$p > svg > foreignObject > section hr:after{clear:both}div#\:\$p > svg > foreignObject > section table{border-collapse:collapse;border-spacing:0;display:block;max-width:100%;overflow:auto;width:-moz-max-content;width:max-content}div#\:\$p > svg > foreignObject > section td,div#\:\$p > svg > foreignObject > section th{padding:0}div#\:\$p > svg > foreignObject > section details summary{cursor:pointer}div#\:\$p > svg > foreignObject > section details:not([open])>:not(summary){display:none}div#\:\$p > svg > foreignObject > section [role=button]:focus,div#\:\$p > svg > foreignObject > section a:focus,div#\:\$p > svg > foreignObject > section input[type=checkbox]:focus,div#\:\$p > svg > foreignObject > section input[type=radio]:focus{box-shadow:none;outline:2px solid var(--focus-outlineColor);outline-offset:-2px}div#\:\$p > svg > foreignObject > section [role=button]:focus:not(:focus-visible),div#\:\$p > svg > foreignObject > section a:focus:not(:focus-visible),div#\:\$p > svg > foreignObject > section input[type=checkbox]:focus:not(:focus-visible),div#\:\$p > svg > foreignObject > section input[type=radio]:focus:not(:focus-visible){outline:1px solid transparent}div#\:\$p > svg > foreignObject > section [role=button]:focus-visible,div#\:\$p > svg > foreignObject > section a:focus-visible,div#\:\$p > svg > foreignObject > section input[type=checkbox]:focus-visible,div#\:\$p > svg > foreignObject > section input[type=radio]:focus-visible{box-shadow:none;outline:2px solid var(--focus-outlineColor);outline-offset:-2px}div#\:\$p > svg > foreignObject > section a:not([class]):focus,div#\:\$p > svg > foreignObject > section a:not([class]):focus-visible,div#\:\$p > svg > foreignObject > section input[type=checkbox]:focus,div#\:\$p > svg > foreignObject > section input[type=checkbox]:focus-visible,div#\:\$p > svg > foreignObject > section input[type=radio]:focus,div#\:\$p > svg > foreignObject > section input[type=radio]:focus-visible{outline-offset:0}div#\:\$p > svg > foreignObject > section kbd{background-color:var(--bgColor-muted);border-bottom-color:var(--borderColor-neutral-muted);border:1px solid var(--borderColor-neutral-muted);border-radius:6px;box-shadow:inset 0 -1px 0 var(--borderColor-neutral-muted);color:var(--fgColor-default);display:inline-block;font:11px var(--fontStack-monospace, ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace);line-height:10px;padding:3px 5px;vertical-align:middle}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1),div#\:\$p > svg > foreignObject > section :is(h2, marp-h2),div#\:\$p > svg > foreignObject > section :is(h3, marp-h3),div#\:\$p > svg > foreignObject > section :is(h4, marp-h4),div#\:\$p > svg > foreignObject > section :is(h5, marp-h5),div#\:\$p > svg > foreignObject > section :is(h6, marp-h6){font-weight:var(--base-text-weight-semibold, 600);line-height:1.25;margin-bottom:16px;margin-top:24px}div#\:\$p > svg > foreignObject > section :is(h2, marp-h2){border-bottom:1px solid var(--borderColor-muted);font-size:1.5em;padding-bottom:.3em}div#\:\$p > svg > foreignObject > section :is(h2, marp-h2),div#\:\$p > svg > foreignObject > section :is(h3, marp-h3){font-weight:var(--base-text-weight-semibold, 600)}div#\:\$p > svg > foreignObject > section :is(h3, marp-h3){font-size:1.25em}div#\:\$p > svg > foreignObject > section :is(h4, marp-h4){font-size:1em}div#\:\$p > svg > foreignObject > section :is(h4, marp-h4),div#\:\$p > svg > foreignObject > section :is(h5, marp-h5){font-weight:var(--base-text-weight-semibold, 600)}div#\:\$p > svg > foreignObject > section :is(h5, marp-h5){font-size:.875em}div#\:\$p > svg > foreignObject > section :is(h6, marp-h6){color:var(--fgColor-muted);font-size:.85em;font-weight:var(--base-text-weight-semibold, 600)}div#\:\$p > svg > foreignObject > section p{margin-bottom:10px;margin-top:0}div#\:\$p > svg > foreignObject > section blockquote{border-left:.25em solid var(--borderColor-default);color:var(--fgColor-muted);margin:0;padding:0 1em}div#\:\$p > svg > foreignObject > section ol,div#\:\$p > svg > foreignObject > section ul{margin-bottom:0;margin-top:0;padding-left:2em}div#\:\$p > svg > foreignObject > section ol ol,div#\:\$p > svg > foreignObject > section ul ol{list-style-type:lower-roman}div#\:\$p > svg > foreignObject > section ol ol ol,div#\:\$p > svg > foreignObject > section ol ul ol,div#\:\$p > svg > foreignObject > section ul ol ol,div#\:\$p > svg > foreignObject > section ul ul ol{list-style-type:lower-alpha}div#\:\$p > svg > foreignObject > section dd{margin-left:0}div#\:\$p > svg > foreignObject > section code,div#\:\$p > svg > foreignObject > section :is(pre, marp-pre),div#\:\$p > svg > foreignObject > section samp,div#\:\$p > svg > foreignObject > section tt{font-family:var(--fontStack-monospace, ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace);font-size:12px}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre){margin-bottom:0;margin-top:0;word-wrap:normal}div#\:\$p > svg > foreignObject > section .octicon{display:inline-block;overflow:visible!important;vertical-align:text-bottom;fill:currentColor}div#\:\$p > svg > foreignObject > section input::-webkit-inner-spin-button,div#\:\$p > svg > foreignObject > section input::-webkit-outer-spin-button{-webkit-appearance:none;appearance:none;margin:0}div#\:\$p > svg > foreignObject > section .mr-2{margin-right:var(--base-size-8, 8px)!important}div#\:\$p > svg > foreignObject > section:after,div#\:\$p > svg > foreignObject > section:before{display:table}div#\:\$p > svg > foreignObject > section:after{clear:both}div#\:\$p > svg > foreignObject > section>:first-child{margin-top:0!important}div#\:\$p > svg > foreignObject > section>:last-child{margin-bottom:0!important}div#\:\$p > svg > foreignObject > section a:not([href]){color:inherit;text-decoration:none}div#\:\$p > svg > foreignObject > section .absent{color:var(--fgColor-danger)}div#\:\$p > svg > foreignObject > section .anchor{float:left;line-height:1;margin-left:-20px;padding-right:4px}div#\:\$p > svg > foreignObject > section .anchor:focus{outline:none}div#\:\$p > svg > foreignObject > section blockquote,div#\:\$p > svg > foreignObject > section details,div#\:\$p > svg > foreignObject > section dl,div#\:\$p > svg > foreignObject > section ol,div#\:\$p > svg > foreignObject > section p,div#\:\$p > svg > foreignObject > section :is(pre, marp-pre),div#\:\$p > svg > foreignObject > section table,div#\:\$p > svg > foreignObject > section ul{margin-bottom:16px;margin-top:0}div#\:\$p > svg > foreignObject > section blockquote>:first-child{margin-top:0}div#\:\$p > svg > foreignObject > section blockquote>:last-child{margin-bottom:0}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1) .octicon-link,div#\:\$p > svg > foreignObject > section :is(h2, marp-h2) .octicon-link,div#\:\$p > svg > foreignObject > section :is(h3, marp-h3) .octicon-link,div#\:\$p > svg > foreignObject > section :is(h4, marp-h4) .octicon-link,div#\:\$p > svg > foreignObject > section :is(h5, marp-h5) .octicon-link,div#\:\$p > svg > foreignObject > section :is(h6, marp-h6) .octicon-link{color:var(--fgColor-default);vertical-align:middle;visibility:hidden}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1):hover .anchor,div#\:\$p > svg > foreignObject > section :is(h2, marp-h2):hover .anchor,div#\:\$p > svg > foreignObject > section :is(h3, marp-h3):hover .anchor,div#\:\$p > svg > foreignObject > section :is(h4, marp-h4):hover .anchor,div#\:\$p > svg > foreignObject > section :is(h5, marp-h5):hover .anchor,div#\:\$p > svg > foreignObject > section :is(h6, marp-h6):hover .anchor{text-decoration:none}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1):hover .anchor .octicon-link,div#\:\$p > svg > foreignObject > section :is(h2, marp-h2):hover .anchor .octicon-link,div#\:\$p > svg > foreignObject > section :is(h3, marp-h3):hover .anchor .octicon-link,div#\:\$p > svg > foreignObject > section :is(h4, marp-h4):hover .anchor .octicon-link,div#\:\$p > svg > foreignObject > section :is(h5, marp-h5):hover .anchor .octicon-link,div#\:\$p > svg > foreignObject > section :is(h6, marp-h6):hover .anchor .octicon-link{visibility:visible}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1) code,div#\:\$p > svg > foreignObject > section :is(h1, marp-h1) tt,div#\:\$p > svg > foreignObject > section :is(h2, marp-h2) code,div#\:\$p > svg > foreignObject > section :is(h2, marp-h2) tt,div#\:\$p > svg > foreignObject > section :is(h3, marp-h3) code,div#\:\$p > svg > foreignObject > section :is(h3, marp-h3) tt,div#\:\$p > svg > foreignObject > section :is(h4, marp-h4) code,div#\:\$p > svg > foreignObject > section :is(h4, marp-h4) tt,div#\:\$p > svg > foreignObject > section :is(h5, marp-h5) code,div#\:\$p > svg > foreignObject > section :is(h5, marp-h5) tt,div#\:\$p > svg > foreignObject > section :is(h6, marp-h6) code,div#\:\$p > svg > foreignObject > section :is(h6, marp-h6) tt{font-size:inherit;padding:0 .2em}div#\:\$p > svg > foreignObject > section summary :is(h1, marp-h1),div#\:\$p > svg > foreignObject > section summary :is(h2, marp-h2),div#\:\$p > svg > foreignObject > section summary :is(h3, marp-h3),div#\:\$p > svg > foreignObject > section summary :is(h4, marp-h4),div#\:\$p > svg > foreignObject > section summary :is(h5, marp-h5),div#\:\$p > svg > foreignObject > section summary :is(h6, marp-h6){display:inline-block}div#\:\$p > svg > foreignObject > section summary :is(h1, marp-h1) .anchor,div#\:\$p > svg > foreignObject > section summary :is(h2, marp-h2) .anchor,div#\:\$p > svg > foreignObject > section summary :is(h3, marp-h3) .anchor,div#\:\$p > svg > foreignObject > section summary :is(h4, marp-h4) .anchor,div#\:\$p > svg > foreignObject > section summary :is(h5, marp-h5) .anchor,div#\:\$p > svg > foreignObject > section summary :is(h6, marp-h6) .anchor{margin-left:-40px}div#\:\$p > svg > foreignObject > section summary :is(h1, marp-h1),div#\:\$p > svg > foreignObject > section summary :is(h2, marp-h2){border-bottom:0;padding-bottom:0}div#\:\$p > svg > foreignObject > section ol.no-list,div#\:\$p > svg > foreignObject > section ul.no-list{list-style-type:none;padding:0}div#\:\$p > svg > foreignObject > section ol[type="a s"]{list-style-type:lower-alpha}div#\:\$p > svg > foreignObject > section ol[type="A s"]{list-style-type:upper-alpha}div#\:\$p > svg > foreignObject > section ol[type="i s"]{list-style-type:lower-roman}div#\:\$p > svg > foreignObject > section ol[type="I s"]{list-style-type:upper-roman}div#\:\$p > svg > foreignObject > section div>ol:not([type]),div#\:\$p > svg > foreignObject > section ol[type="1"]{list-style-type:decimal}div#\:\$p > svg > foreignObject > section ol ol,div#\:\$p > svg > foreignObject > section ol ul,div#\:\$p > svg > foreignObject > section ul ol,div#\:\$p > svg > foreignObject > section ul ul{margin-bottom:0;margin-top:0}div#\:\$p > svg > foreignObject > section li>p{margin-top:16px}div#\:\$p > svg > foreignObject > section li+li{margin-top:.25em}div#\:\$p > svg > foreignObject > section dl{padding:0}div#\:\$p > svg > foreignObject > section dl dt{font-size:1em;font-style:italic;font-weight:var(--base-text-weight-semibold, 600);margin-top:16px;padding:0}div#\:\$p > svg > foreignObject > section dl dd{margin-bottom:16px;padding:0 16px}div#\:\$p > svg > foreignObject > section table th{font-weight:var(--base-text-weight-semibold, 600)}div#\:\$p > svg > foreignObject > section table td,div#\:\$p > svg > foreignObject > section table th{border:1px solid var(--borderColor-default);padding:6px 13px}div#\:\$p > svg > foreignObject > section table td>:last-child{margin-bottom:0}div#\:\$p > svg > foreignObject > section table tr{background-color:var(--bgColor-default);border-top:1px solid var(--borderColor-muted)}div#\:\$p > svg > foreignObject > section table tr:nth-child(2n){background-color:var(--bgColor-muted)}div#\:\$p > svg > foreignObject > section table img{background-color:transparent}div#\:\$p > svg > foreignObject > section img[align=right]{padding-left:20px}div#\:\$p > svg > foreignObject > section img[align=left]{padding-right:20px}div#\:\$p > svg > foreignObject > section .emoji{background-color:transparent;max-width:none;vertical-align:text-top}div#\:\$p > svg > foreignObject > section :is(span, marp-span).frame,div#\:\$p > svg > foreignObject > section :is(span, marp-span).frame>:is(span, marp-span){display:block;overflow:hidden}div#\:\$p > svg > foreignObject > section :is(span, marp-span).frame>:is(span, marp-span){border:1px solid var(--borderColor-default);float:left;margin:13px 0 0;padding:7px;width:auto}div#\:\$p > svg > foreignObject > section :is(span, marp-span).frame :is(span, marp-span) img{display:block;float:left}div#\:\$p > svg > foreignObject > section :is(span, marp-span).frame :is(span, marp-span) :is(span, marp-span){clear:both;color:var(--fgColor-default);display:block;padding:5px 0 0}div#\:\$p > svg > foreignObject > section :is(span, marp-span).align-center{clear:both;display:block;overflow:hidden}div#\:\$p > svg > foreignObject > section :is(span, marp-span).align-center>:is(span, marp-span){display:block;margin:13px auto 0;overflow:hidden;text-align:center}div#\:\$p > svg > foreignObject > section :is(span, marp-span).align-center :is(span, marp-span) img{margin:0 auto;text-align:center}div#\:\$p > svg > foreignObject > section :is(span, marp-span).align-right{clear:both;display:block;overflow:hidden}div#\:\$p > svg > foreignObject > section :is(span, marp-span).align-right>:is(span, marp-span){display:block;margin:13px 0 0;overflow:hidden;text-align:right}div#\:\$p > svg > foreignObject > section :is(span, marp-span).align-right :is(span, marp-span) img{margin:0;text-align:right}div#\:\$p > svg > foreignObject > section :is(span, marp-span).float-left{display:block;float:left;margin-right:13px;overflow:hidden}div#\:\$p > svg > foreignObject > section :is(span, marp-span).float-left :is(span, marp-span){margin:13px 0 0}div#\:\$p > svg > foreignObject > section :is(span, marp-span).float-right{display:block;float:right;margin-left:13px;overflow:hidden}div#\:\$p > svg > foreignObject > section :is(span, marp-span).float-right>:is(span, marp-span){display:block;margin:13px auto 0;overflow:hidden;text-align:right}div#\:\$p > svg > foreignObject > section code,div#\:\$p > svg > foreignObject > section tt{background-color:var(--bgColor-neutral-muted);border-radius:6px;font-size:85%;margin:0;padding:.2em .4em;white-space:break-spaces}div#\:\$p > svg > foreignObject > section code br,div#\:\$p > svg > foreignObject > section tt br{display:none}div#\:\$p > svg > foreignObject > section del code{text-decoration:inherit}div#\:\$p > svg > foreignObject > section samp{font-size:85%}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) code{font-size:100%}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre)>code{background:transparent;border:0;margin:0;padding:0;white-space:pre;word-break:normal}div#\:\$p > svg > foreignObject > section .highlight{margin-bottom:16px}div#\:\$p > svg > foreignObject > section .highlight :is(pre, marp-pre){margin-bottom:0;word-break:normal}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre){background-color:var(--bgColor-muted);border-radius:6px;color:var(--fgColor-default);font-size:85%;line-height:1.45;overflow:auto;padding:16px}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) code,div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) tt{display:inline;line-height:inherit;margin:0;max-width:auto;overflow:visible;padding:0;word-wrap:normal;background-color:transparent;border:0}div#\:\$p > svg > foreignObject > section .csv-data td,div#\:\$p > svg > foreignObject > section .csv-data th{font-size:12px;line-height:1;overflow:hidden;padding:5px;text-align:left;white-space:nowrap}div#\:\$p > svg > foreignObject > section .csv-data .blob-num{background:var(--bgColor-default);border:0;padding:10px 8px 9px;text-align:right}div#\:\$p > svg > foreignObject > section .csv-data tr{border-top:0}div#\:\$p > svg > foreignObject > section .csv-data th{background:var(--bgColor-muted);border-top:0;font-weight:var(--base-text-weight-semibold, 600)}div#\:\$p > svg > foreignObject > section [data-footnote-ref]:before{content:"["}div#\:\$p > svg > foreignObject > section [data-footnote-ref]:after{content:"]"}div#\:\$p > svg > foreignObject > section .footnotes{border-top:1px solid var(--borderColor-default);color:var(--fgColor-muted);font-size:12px}div#\:\$p > svg > foreignObject > section div#\:\$p > svg > foreignObject > section section.footnotes{--marpit-root-font-size:12px;}div#\:\$p > svg > foreignObject > section .footnotes ol{padding-left:16px}div#\:\$p > svg > foreignObject > section .footnotes ol ul{display:inline-block;margin-top:16px;padding-left:16px}div#\:\$p > svg > foreignObject > section .footnotes li{position:relative}div#\:\$p > svg > foreignObject > section .footnotes li:target:before{border:2px solid var(--borderColor-accent-emphasis);border-radius:6px;bottom:-8px;content:"";left:-24px;pointer-events:none;position:absolute;right:-8px;top:-8px}div#\:\$p > svg > foreignObject > section .footnotes li:target{color:var(--fgColor-default)}div#\:\$p > svg > foreignObject > section .footnotes .data-footnote-backref g-emoji{font-family:monospace}div#\:\$p > svg > foreignObject > section .pl-c{color:var(--color-prettylights-syntax-comment)}div#\:\$p > svg > foreignObject > section .pl-c1,div#\:\$p > svg > foreignObject > section .pl-s .pl-v{color:var(--color-prettylights-syntax-constant)}div#\:\$p > svg > foreignObject > section .pl-e,div#\:\$p > svg > foreignObject > section .pl-en{color:var(--color-prettylights-syntax-entity)}div#\:\$p > svg > foreignObject > section .pl-s .pl-s1,div#\:\$p > svg > foreignObject > section .pl-smi{color:var(--color-prettylights-syntax-storage-modifier-import)}div#\:\$p > svg > foreignObject > section .pl-ent{color:var(--color-prettylights-syntax-entity-tag)}div#\:\$p > svg > foreignObject > section .pl-k{color:var(--color-prettylights-syntax-keyword)}div#\:\$p > svg > foreignObject > section .pl-pds,div#\:\$p > svg > foreignObject > section .pl-s,div#\:\$p > svg > foreignObject > section .pl-s .pl-pse .pl-s1,div#\:\$p > svg > foreignObject > section .pl-sr,div#\:\$p > svg > foreignObject > section .pl-sr .pl-cce,div#\:\$p > svg > foreignObject > section .pl-sr .pl-sra,div#\:\$p > svg > foreignObject > section .pl-sr .pl-sre{color:var(--color-prettylights-syntax-string)}div#\:\$p > svg > foreignObject > section .pl-smw,div#\:\$p > svg > foreignObject > section .pl-v{color:var(--color-prettylights-syntax-variable)}div#\:\$p > svg > foreignObject > section .pl-bu{color:var(--color-prettylights-syntax-brackethighlighter-unmatched)}div#\:\$p > svg > foreignObject > section .pl-ii{background-color:var(--color-prettylights-syntax-invalid-illegal-bg);color:var(--color-prettylights-syntax-invalid-illegal-text)}div#\:\$p > svg > foreignObject > section .pl-c2{background-color:var(--color-prettylights-syntax-carriage-return-bg);color:var(--color-prettylights-syntax-carriage-return-text)}div#\:\$p > svg > foreignObject > section .pl-sr .pl-cce{color:var(--color-prettylights-syntax-string-regexp);font-weight:700}div#\:\$p > svg > foreignObject > section .pl-ml{color:var(--color-prettylights-syntax-markup-list)}div#\:\$p > svg > foreignObject > section .pl-mh,div#\:\$p > svg > foreignObject > section .pl-mh .pl-en,div#\:\$p > svg > foreignObject > section .pl-ms{color:var(--color-prettylights-syntax-markup-heading);font-weight:700}div#\:\$p > svg > foreignObject > section .pl-mi{color:var(--color-prettylights-syntax-markup-italic);font-style:italic}div#\:\$p > svg > foreignObject > section .pl-mb{color:var(--color-prettylights-syntax-markup-bold);font-weight:700}div#\:\$p > svg > foreignObject > section .pl-md{background-color:var(--color-prettylights-syntax-markup-deleted-bg);color:var(--color-prettylights-syntax-markup-deleted-text)}div#\:\$p > svg > foreignObject > section .pl-mi1{background-color:var(--color-prettylights-syntax-markup-inserted-bg);color:var(--color-prettylights-syntax-markup-inserted-text)}div#\:\$p > svg > foreignObject > section .pl-mc{background-color:var(--color-prettylights-syntax-markup-changed-bg);color:var(--color-prettylights-syntax-markup-changed-text)}div#\:\$p > svg > foreignObject > section .pl-mi2{background-color:var(--color-prettylights-syntax-markup-ignored-bg);color:var(--color-prettylights-syntax-markup-ignored-text)}div#\:\$p > svg > foreignObject > section .pl-mdr{color:var(--color-prettylights-syntax-meta-diff-range);font-weight:700}div#\:\$p > svg > foreignObject > section .pl-ba{color:var(--color-prettylights-syntax-brackethighlighter-angle)}div#\:\$p > svg > foreignObject > section .pl-sg{color:var(--color-prettylights-syntax-sublimelinter-gutter-mark)}div#\:\$p > svg > foreignObject > section .pl-corl{color:var(--color-prettylights-syntax-constant-other-reference-link);text-decoration:underline}div#\:\$p > svg > foreignObject > section [role=button]:focus:not(:focus-visible),div#\:\$p > svg > foreignObject > section [role=tabpanel][tabindex="0"]:focus:not(:focus-visible),div#\:\$p > svg > foreignObject > section a:focus:not(:focus-visible),div#\:\$p > svg > foreignObject > section button:focus:not(:focus-visible),div#\:\$p > svg > foreignObject > section summary:focus:not(:focus-visible){box-shadow:none;outline:none}div#\:\$p > svg > foreignObject > section [tabindex="0"]:focus:not(:focus-visible),div#\:\$p > svg > foreignObject > section details-dialog:focus:not(:focus-visible){outline:none}div#\:\$p > svg > foreignObject > section g-emoji{display:inline-block;font-family:Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol;font-size:1em;font-style:normal!important;font-weight:var(--base-text-weight-normal, 400);line-height:1;min-width:1ch;vertical-align:-.075em}div#\:\$p > svg > foreignObject > section g-emoji img{height:1em;width:1em}div#\:\$p > svg > foreignObject > section .task-list-item{list-style-type:none}div#\:\$p > svg > foreignObject > section .task-list-item label{font-weight:var(--base-text-weight-normal, 400)}div#\:\$p > svg > foreignObject > section .task-list-item.enabled label{cursor:pointer}div#\:\$p > svg > foreignObject > section .task-list-item+.task-list-item{margin-top:var(--base-size-4)}div#\:\$p > svg > foreignObject > section .task-list-item .handle{display:none}div#\:\$p > svg > foreignObject > section .task-list-item-checkbox{margin:0 .2em .25em -1.4em;vertical-align:middle}div#\:\$p > svg > foreignObject > section .contains-task-list:dir(rtl) .task-list-item-checkbox{margin:0 -1.6em .25em .2em}div#\:\$p > svg > foreignObject > section .contains-task-list{position:relative}div#\:\$p > svg > foreignObject > section .contains-task-list:focus-within .task-list-item-convert-container,div#\:\$p > svg > foreignObject > section .contains-task-list:hover .task-list-item-convert-container{display:block;height:24px;overflow:visible;width:auto;clip:auto}div#\:\$p > svg > foreignObject > section ::-webkit-calendar-picker-indicator{filter:invert(50%)}div#\:\$p > svg > foreignObject > section .markdown-alert{border-left:.25em solid var(--borderColor-default);color:inherit;margin-bottom:var(--base-size-16);padding:var(--base-size-8) var(--base-size-16)}div#\:\$p > svg > foreignObject > section .markdown-alert>:first-child{margin-top:0}div#\:\$p > svg > foreignObject > section .markdown-alert>:last-child{margin-bottom:0}div#\:\$p > svg > foreignObject > section .markdown-alert .markdown-alert-title{align-items:center;display:flex;font-weight:var(--base-text-weight-medium, 500);line-height:1}div#\:\$p > svg > foreignObject > section .markdown-alert.markdown-alert-note{border-left-color:var(--borderColor-accent-emphasis)}div#\:\$p > svg > foreignObject > section .markdown-alert.markdown-alert-note .markdown-alert-title{color:var(--fgColor-accent)}div#\:\$p > svg > foreignObject > section .markdown-alert.markdown-alert-important{border-left-color:var(--borderColor-done-emphasis)}div#\:\$p > svg > foreignObject > section .markdown-alert.markdown-alert-important .markdown-alert-title{color:var(--fgColor-done)}div#\:\$p > svg > foreignObject > section .markdown-alert.markdown-alert-warning{border-left-color:var(--borderColor-attention-emphasis)}div#\:\$p > svg > foreignObject > section .markdown-alert.markdown-alert-warning .markdown-alert-title{color:var(--fgColor-attention)}div#\:\$p > svg > foreignObject > section .markdown-alert.markdown-alert-tip{border-left-color:var(--borderColor-success-emphasis)}div#\:\$p > svg > foreignObject > section .markdown-alert.markdown-alert-tip .markdown-alert-title{color:var(--fgColor-success)}div#\:\$p > svg > foreignObject > section .markdown-alert.markdown-alert-caution{border-left-color:var(--borderColor-danger-emphasis)}div#\:\$p > svg > foreignObject > section .markdown-alert.markdown-alert-caution .markdown-alert-title{color:var(--fgColor-danger)}div#\:\$p > svg > foreignObject > section>:first-child>.heading-element:first-child{margin-top:0!important}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1){color:var(--h1-color);font-size:1.6em}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1),div#\:\$p > svg > foreignObject > section :is(h2, marp-h2){border-bottom:none}div#\:\$p > svg > foreignObject > section :is(h2, marp-h2){font-size:1.3em}div#\:\$p > svg > foreignObject > section :is(h3, marp-h3){font-size:1.1em}div#\:\$p > svg > foreignObject > section :is(h4, marp-h4){font-size:1.05em}div#\:\$p > svg > foreignObject > section :is(h5, marp-h5){font-size:1em}div#\:\$p > svg > foreignObject > section :is(h6, marp-h6){font-size:.9em}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1) strong,div#\:\$p > svg > foreignObject > section :is(h2, marp-h2) strong,div#\:\$p > svg > foreignObject > section :is(h3, marp-h3) strong,div#\:\$p > svg > foreignObject > section :is(h4, marp-h4) strong,div#\:\$p > svg > foreignObject > section :is(h5, marp-h5) strong,div#\:\$p > svg > foreignObject > section :is(h6, marp-h6) strong{color:var(--heading-strong-color);font-weight:inherit}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h2, marp-h2)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h3, marp-h3)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h4, marp-h4)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h5, marp-h5)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h6, marp-h6)::part(auto-scaling){max-height:563px}div#\:\$p > svg > foreignObject > section hr{height:0;padding-top:.25em}div#\:\$p > svg > foreignObject > section img{background-color:transparent}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre){border:1px solid var(--borderColor-default);line-height:1.15;overflow:visible}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre)::part(auto-scaling){max-height:529px}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs){color:var(--color-prettylights-syntax-storage-modifier-import)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-doctag),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-keyword),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-meta .hljs-keyword),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-template-tag),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-template-variable),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-type),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-variable.language_){color:var(--color-prettylights-syntax-keyword)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-title),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-title.class_),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-title.class_.inherited__),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-title.function_){color:var(--color-prettylights-syntax-entity)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-attr),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-attribute),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-literal),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-meta),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-number),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-operator),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-selector-attr),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-selector-class),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-selector-id),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-variable){color:var(--color-prettylights-syntax-constant)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-meta .hljs-string),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-regexp),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-string){color:var(--color-prettylights-syntax-string)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-built_in),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-symbol){color:var(--color-prettylights-syntax-variable)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-code),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-comment),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-formula){color:var(--color-prettylights-syntax-comment)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-name),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-quote),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-selector-pseudo),div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-selector-tag){color:var(--color-prettylights-syntax-entity-tag)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-subst){color:var(--color-prettylights-syntax-storage-modifier-import)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-section){color:var(--color-prettylights-syntax-markup-heading);font-weight:700}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-bullet){color:var(--color-prettylights-syntax-markup-list)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-emphasis){color:var(--color-prettylights-syntax-markup-italic);font-style:italic}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-strong){color:var(--color-prettylights-syntax-markup-bold);font-weight:700}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-addition){background-color:var(--color-prettylights-syntax-markup-inserted-bg);color:var(--color-prettylights-syntax-markup-inserted-text)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) :where(.hljs-deletion){background-color:var(--color-prettylights-syntax-markup-deleted-bg);color:var(--color-prettylights-syntax-markup-deleted-text)}div#\:\$p > svg > foreignObject > section footer,div#\:\$p > svg > foreignObject > section header{color:var(--header-footer-color);font-size:18px;left:30px;margin:0;position:absolute}div#\:\$p > svg > foreignObject > section header{top:21px}div#\:\$p > svg > foreignObject > section footer{bottom:21px}div#\:\$p > svg > foreignObject > section{--h1-color:#246;--header-footer-color:hsla(0,0%,40%,.75);--heading-strong-color:#48c;--paginate-color:#777;align-items:stretch;display:block;flex-flow:column nowrap;font-size:29px;height:720px;padding:78.5px;place-content:safe center center;width:1280px}div#\:\$p > svg > foreignObject > section{--marpit-root-font-size:29px;}div#\:\$p > svg > foreignObject > section:where(.invert){--h1-color:#cee7ff;--header-footer-color:hsla(0,0%,60%,.75);--heading-strong-color:#7bf;--paginate-color:#999;}div#\:\$p > svg > foreignObject > section>:last-child,div#\:\$p > svg > foreignObject > section[data-footer]>:nth-last-child(2){margin-bottom:0}div#\:\$p > svg > foreignObject > section>:first-child,div#\:\$p > svg > foreignObject > section>header:first-child+*{margin-top:0}div#\:\$p > svg > foreignObject > section:after{bottom:21px;color:var(--paginate-color);font-size:24px;padding:0;position:absolute;right:30px}div#\:\$p > svg > foreignObject > section:after{--marpit-root-font-size:24px;}div#\:\$p > svg > foreignObject > section[data-color] :is(h1, marp-h1),div#\:\$p > svg > foreignObject > section[data-color] :is(h2, marp-h2),div#\:\$p > svg > foreignObject > section[data-color] :is(h3, marp-h3),div#\:\$p > svg > foreignObject > section[data-color] :is(h4, marp-h4),div#\:\$p > svg > foreignObject > section[data-color] :is(h5, marp-h5),div#\:\$p > svg > foreignObject > section[data-color] :is(h6, marp-h6){color:currentcolor}div#\:\$p > svg > foreignObject > :where(section){container-type:size}div#\:\$p > svg > foreignObject > section mjx-container[jax="SVG"]{direction:ltr}div#\:\$p > svg > foreignObject > section mjx-container[jax="SVG"] > svg{overflow:visible;min-height:1px;min-width:1px}div#\:\$p > svg > foreignObject > section mjx-container[jax="SVG"] > svg a{fill:blue;stroke:blue}div#\:\$p > svg > foreignObject > section mjx-container[jax="SVG"][display="true"]{display:block;text-align:center;margin:1em 0}div#\:\$p > svg > foreignObject > section mjx-container[jax="SVG"][display="true"][width="full"]{display:flex}div#\:\$p > svg > foreignObject > section mjx-container[jax="SVG"][justify="left"]{text-align:left}div#\:\$p > svg > foreignObject > section mjx-container[jax="SVG"][justify="right"]{text-align:right}div#\:\$p > svg > foreignObject > section g[data-mml-node="merror"] > g{fill:red;stroke:red}div#\:\$p > svg > foreignObject > section g[data-mml-node="merror"] > rect[data-background]{fill:yellow;stroke:none}div#\:\$p > svg > foreignObject > section g[data-mml-node="mtable"] > line[data-line], div#\:\$p > svg > foreignObject > section svg[data-table] > g > line[data-line]{stroke-width:70px;fill:none}div#\:\$p > svg > foreignObject > section g[data-mml-node="mtable"] > rect[data-frame], div#\:\$p > svg > foreignObject > section svg[data-table] > g > rect[data-frame]{stroke-width:70px;fill:none}div#\:\$p > svg > foreignObject > section g[data-mml-node="mtable"] > .mjx-dashed, div#\:\$p > svg > foreignObject > section svg[data-table] > g > .mjx-dashed{stroke-dasharray:140}div#\:\$p > svg > foreignObject > section g[data-mml-node="mtable"] > .mjx-dotted, div#\:\$p > svg > foreignObject > section svg[data-table] > g > .mjx-dotted{stroke-linecap:round;stroke-dasharray:0,140}div#\:\$p > svg > foreignObject > section g[data-mml-node="mtable"] > g > svg{overflow:visible}div#\:\$p > svg > foreignObject > section [jax="SVG"] mjx-tool{display:inline-block;position:relative;width:0;height:0}div#\:\$p > svg > foreignObject > section [jax="SVG"] mjx-tool > mjx-tip{position:absolute;top:0;left:0}div#\:\$p > svg > foreignObject > section mjx-tool > mjx-tip{display:inline-block;padding:.2em;border:1px solid #888;font-size:70%;background-color:#F8F8F8;color:black;box-shadow:2px 2px 5px #AAAAAA}div#\:\$p > svg > foreignObject > section g[data-mml-node="maction"][data-toggle]{cursor:pointer}div#\:\$p > svg > foreignObject > section mjx-status{display:block;position:fixed;left:1em;bottom:1em;min-width:25%;padding:.2em .4em;border:1px solid #888;font-size:90%;background-color:#F8F8F8;color:black}div#\:\$p > svg > foreignObject > section foreignObject[data-mjx-xml]{font-family:initial;line-height:normal;overflow:visible}div#\:\$p > svg > foreignObject > section mjx-container[jax="SVG"] path[data-c], div#\:\$p > svg > foreignObject > section mjx-container[jax="SVG"] use[data-c]{stroke-width:3}@media print{div#\:\$p > svg > foreignObject > section mjx-container[jax=SVG] path[data-c],div#\:\$p > svg > foreignObject > section mjx-container[jax=SVG] use[data-c]{stroke-width:0}}div#\:\$p > svg > foreignObject > section img[data-marp-twemoji]{background:transparent;height:1em;margin:0 .05em 0 .1em;vertical-align:-.1em;width:1em}div#\:\$p > svg > foreignObject > section .container{display:flex}div#\:\$p > svg > foreignObject > section .col{flex:1}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"]{columns:initial!important;display:block!important;padding:0!important}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"]::before, div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"]::after, div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="content"]::before, div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="content"]::after{display:none!important}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"] > div[data-marpit-advanced-background-container]{all:initial;display:flex;flex-direction:row;height:100%;overflow:hidden;width:100%}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"] > div[data-marpit-advanced-background-container][data-marpit-advanced-background-direction="vertical"]{flex-direction:column}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"][data-marpit-advanced-background-split] > div[data-marpit-advanced-background-container]{width:var(--marpit-advanced-background-split, 50%)}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"][data-marpit-advanced-background-split="right"] > div[data-marpit-advanced-background-container]{margin-left:calc(100% - var(--marpit-advanced-background-split, 50%))}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"] > div[data-marpit-advanced-background-container] > figure{all:initial;background-position:center;background-repeat:no-repeat;background-size:cover;flex:auto;margin:0}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"] > div[data-marpit-advanced-background-container] > figure > figcaption{position:absolute;border:0;clip:rect(0, 0, 0, 0);height:1px;margin:-1px;overflow:hidden;padding:0;white-space:nowrap;width:1px}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="content"], div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="pseudo"]{background:transparent!important}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="pseudo"], div#\:\$p > svg[data-marpit-svg] > foreignObject[data-marpit-advanced-background="pseudo"]{pointer-events:none!important}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background-split]{width:100%;height:100%}
-</style></head><body><div class="bespoke-marp-osc"><button data-bespoke-marp-osc="prev" tabindex="-1" title="Previous slide">Previous slide</button><span data-bespoke-marp-osc="page"></span><button data-bespoke-marp-osc="next" tabindex="-1" title="Next slide">Next slide</button><button data-bespoke-marp-osc="fullscreen" tabindex="-1" title="Toggle fullscreen (f)">Toggle fullscreen</button><button data-bespoke-marp-osc="presenter" tabindex="-1" title="Open presenter view (p)">Open presenter view</button></div><div id=":$p"><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="1" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</style></head><body><div class="bespoke-marp-osc"><button data-bespoke-marp-osc="prev" tabindex="-1" title="Previous slide">Previous slide</button><span data-bespoke-marp-osc="page"></span><button data-bespoke-marp-osc="next" tabindex="-1" title="Next slide">Next slide</button><button data-bespoke-marp-osc="fullscreen" tabindex="-1" title="Toggle fullscreen (f)">Toggle fullscreen</button><button data-bespoke-marp-osc="presenter" tabindex="-1" title="Open presenter view (p)">Open presenter view</button></div><div id=":$p"><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="1" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h1 id="mapping-in-javascript">Mapping in JavaScript</h1>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="2" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="2" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="today">Today</h2>
 <ul>
 <li>Discuss types of maps &amp; appropriate library choices.</li>
 <li>Explore examples in D3, Leaflet, and MapLibreGL.</li>
 </ul>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;--marpit-advanced-background-split:50%;" data-marpit-advanced-background="background" data-marpit-advanced-background-split="left"><div data-marpit-advanced-background-container="true" data-marpit-advanced-background-direction="horizontal"><figure style="background-image:url(&quot;map1.png&quot;);background-size:contain;"></figure></div></section></foreignObject><foreignObject width="50%" height="720" x="50%"><section id="3" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;--marpit-advanced-background-split:50%;" data-marpit-advanced-background="content" data-marpit-advanced-background-split="left">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;--marpit-advanced-background-split:50%;" data-marpit-advanced-background="background" data-marpit-advanced-background-split="left"><div data-marpit-advanced-background-container="true" data-marpit-advanced-background-direction="horizontal"><figure style="background-image:url(&quot;map1.png&quot;);background-size:contain;"></figure></div></section></foreignObject><foreignObject width="50%" height="720" x="50%"><section id="3" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;--marpit-advanced-background-split:50%;" data-marpit-advanced-background="content" data-marpit-advanced-background-split="left">
 <h2 id="which-tool">Which Tool?</h2>
 <p><strong>What kind of map?</strong></p>
 
 <p>Abstract/geometric representation of data.</p>
 <p>D3 will provide the most flexibility &amp; can use existing tools for color scales/interactivity/etc.</p>
 </section>
-</foreignObject><foreignObject width="1280" height="720" data-marpit-advanced-background="pseudo"><section data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="" data-marpit-advanced-background="pseudo" data-marpit-advanced-background-split="left"></section></foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;--marpit-advanced-background-split:50%;" data-marpit-advanced-background="background" data-marpit-advanced-background-split="right"><div data-marpit-advanced-background-container="true" data-marpit-advanced-background-direction="horizontal"><figure style="background-image:url(&quot;map2.png&quot;);background-size:contain;"></figure></div></section></foreignObject><foreignObject width="50%" height="720"><section id="4" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;--marpit-advanced-background-split:50%;" data-marpit-advanced-background="content" data-marpit-advanced-background-split="right">
+</foreignObject><foreignObject width="1280" height="720" data-marpit-advanced-background="pseudo"><section data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="" data-marpit-advanced-background="pseudo" data-marpit-advanced-background-split="left"></section></foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;--marpit-advanced-background-split:50%;" data-marpit-advanced-background="background" data-marpit-advanced-background-split="right"><div data-marpit-advanced-background-container="true" data-marpit-advanced-background-direction="horizontal"><figure style="background-image:url(&quot;map2.png&quot;);background-size:contain;"></figure></div></section></foreignObject><foreignObject width="50%" height="720"><section id="4" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;--marpit-advanced-background-split:50%;" data-marpit-advanced-background="content" data-marpit-advanced-background-split="right">
 <h2 id="map-w-cartographic-features">Map w/ Cartographic Features</h2>
 
 <p>A different library will be necessary. Depending on needs <strong>raster</strong> or <strong>vector</strong> tiles.</p>
 </section>
-</foreignObject><foreignObject width="1280" height="720" data-marpit-advanced-background="pseudo"><section data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="" data-marpit-advanced-background="pseudo" data-marpit-advanced-background-split="right"></section></foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="5" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject><foreignObject width="1280" height="720" data-marpit-advanced-background="pseudo"><section data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="" data-marpit-advanced-background="pseudo" data-marpit-advanced-background-split="right"></section></foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="5" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="choropleths-in-d3">Choropleths in D3</h2>
 <p><a href="https://d3-graph-gallery.com/graph/choropleth_basic.html">https://d3-graph-gallery.com/graph/choropleth_basic.html</a></p>
 <h3 id="projection">Projection</h3>
 <p><a href="https://d3-graph-gallery.com/graph/backgroundmap_changeprojection.html">https://d3-graph-gallery.com/graph/backgroundmap_changeprojection.html</a></p>
 </section>
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+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="6" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="leaflet-and-maplibregl-choropleths">Leaflet and MapLibreGL Choropleths</h2>
 <ul>
 <li>Projection choice constrained by tile layers.</li>
@@ -44,7 +44,7 @@
 </ul>
 <p>Demo/Tutorial: <a href="https://leafletjs.com/examples/choropleth/">https://leafletjs.com/examples/choropleth/</a></p>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="7" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="7" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="base-maps">Base Maps</h2>
 <p>Instead of starting with a blank slate, it can be helpful to have a base map, but a base map is often comprised of many feature layers:</p>
 <ul>
@@ -57,12 +57,12 @@
 </ul>
 <p>Drawing all of these layers adds up.</p>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="8" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="8" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="raster-tiles">Raster Tiles</h2>
 <p>An innovation that made web mapping scalable in the mid-2000s was pre-rendering base layers into image tiles.</p>
 <p><img src="XYZ_Tiles.png" alt="" /></p>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="9" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="9" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="raster-tiles-1">Raster Tiles</h2>
 <h3 id="pros">Pros</h3>
 <ul>
@@ -74,7 +74,7 @@
 <li>Good for dense data.</li>
 </ul>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="10" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="10" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h3 id="cons">Cons</h3>
 <ul>
 <li>Fixed zoom levels and projection.</li>
@@ -83,7 +83,7 @@
 <li>No modifications to styling after the fact.</li>
 </ul>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="11" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="11" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="vector-tiles">Vector Tiles</h2>
 <p>Instead of images, data is sent as images.</p>
 <ul>
@@ -96,19 +96,19 @@
 </ul>
 <p>Blog Post from <em>today</em> on OSM switch to Vector tiles: <a href="https://tech.marksblogg.com/osm-mvt-vector-tiles.html">https://tech.marksblogg.com/osm-mvt-vector-tiles.html</a></p>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="12" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="12" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="leaflet">Leaflet</h2>
 <p><strong>Raster Tiles w/ Vector Layer on Top</strong></p>
 <p><a href="https://leafletjs.com/reference.html">https://leafletjs.com/reference.html</a></p>
 <p>(Has plugins to use Vector Tiles via MapLibreGL)</p>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="13" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="13" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="maplibregl">MapLibreGL</h2>
 <p>Vector-tile based library. Community fork of MapboxGL.</p>
 <p>Mapbox is an innovator in the space, but also quite expensive.</p>
 <p>MaplibreGL/MapboxGL are mostly compatible.</p>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="14" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="14" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="general-workflow">General Workflow</h2>
 <ul>
 <li>Use library to render map(s) to div(s) on page.</li>
@@ -117,20 +117,29 @@
 <li>If vector, possibly apply additional styling to base.</li>
 </ul>
 </li>
-<li>Add additional vector layers based on your data &amp; its features.</li>
+<li>Add additional vector layers based on your data &amp; its features. Do this using methods on the <code>map</code> object you got back in the earlier steps.</li>
 <li>Attach event handlers for interactivity on your features and/or input elements adjacent to the map.</li>
 </ul>
 </section>
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+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;--marpit-advanced-background-split:50%;" data-marpit-advanced-background="background" data-marpit-advanced-background-split="right"><div data-marpit-advanced-background-container="true" data-marpit-advanced-background-direction="horizontal"><figure style="background-image:url(&quot;clustering.png&quot;);background-size:contain;"></figure></div></section></foreignObject><foreignObject width="50%" height="720"><section id="15" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;--marpit-advanced-background-split:50%;" data-marpit-advanced-background="content" data-marpit-advanced-background-split="right">
+<h2 id="clustering">Clustering</h2>
+
+<p>Helps reduce visual clutter and increase performance when there are many points.</p>
+<ul>
+<li><a href="https://github.com/Leaflet/Leaflet.markercluster">https://github.com/Leaflet/Leaflet.markercluster</a></li>
+<li><a href="https://maplibre.org/maplibre-gl-js/docs/examples/cluster/">https://maplibre.org/maplibre-gl-js/docs/examples/cluster/</a></li>
+</ul>
+</section>
+</foreignObject><foreignObject width="1280" height="720" data-marpit-advanced-background="pseudo"><section data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="" data-marpit-advanced-background="pseudo" data-marpit-advanced-background-split="right"></section></foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="16" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="pop-ups">Pop-ups</h2>
 <p>Leaflet/MapLibre offer a simple API for adding pop-ups to features.</p>
 <p>Reminder: hover/pop-up alone is <strong>not enough interactivity</strong> for final product.</p>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="16" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="17" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="examples">Examples</h2>
 <p>Leaflet &amp; MapLibre examples</p>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="17" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="18" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="custom-base-layers">Custom Base Layers</h2>
 <ul>
 <li><a href="https://stadiamaps.com/products/map-tiles/">Stadia Maps Hosted Tiles</a>, free for noncommercial/academic use. You will need an account though.</li>
@@ -138,7 +147,7 @@
 <li><a href="https://www.mapbox.com">Mapbox</a> - another paid solution, $$$.</li>
 </ul>
 </section>
-</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="18" data-theme="idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy" lang="en-US" style="--theme:idfsmo6ll39jn0gij7x2cdg4gbpbflwv3aiq73b5xy;">
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="19" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
 <h2 id="other-libraries">Other Libraries</h2>
 <ul>
 <li><a href="https://deck.gl">Deck.gl</a> - Alternative renderer similar to Map*GL. TypeScript/React focused mostly, hard to use with JS we covered.</li>
@@ -150,6 +159,13 @@
 </li>
 </ul>
 </section>
+</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="20" data-theme="filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r" lang="en-US" style="--theme:filhvj2rzms2k0mokvv48s5v69y2qsxcg9aj2hije18r;">
+<h2 id="more-examples">More Examples</h2>
+<ul>
+<li><a href="https://projects.fivethirtyeight.com/redistricting-maps/alabama/#Competitive">https://projects.fivethirtyeight.com/redistricting-maps/alabama/#Competitive</a></li>
+<li><a href="https://projects.fivethirtyeight.com/partisan-gerrymandering-north-carolina/">https://projects.fivethirtyeight.com/partisan-gerrymandering-north-carolina/</a></li>
+</ul>
+</section>
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diff --git a/13.js-mapping/slides.md b/13.js-mapping/slides.md
index d61beb7..ed6595d 100644
--- a/13.js-mapping/slides.md
+++ b/13.js-mapping/slides.md
@@ -134,11 +134,22 @@ MaplibreGL/MapboxGL are mostly compatible.
 - Use library to render map(s) to div(s) on page.
 - Pick base layer, either raster or vector.
     - If vector, possibly apply additional styling to base.
-- Add additional vector layers based on your data & its features.
+- Add additional vector layers based on your data & its features. Do this using methods on the `map` object you got back in the earlier steps.
 - Attach event handlers for interactivity on your features and/or input elements adjacent to the map.
 
 ---
 
+## Clustering
+
+![bg fit right](clustering.png)
+
+Helps reduce visual clutter and increase performance when there are many points.
+
+- <https://github.com/Leaflet/Leaflet.markercluster>
+- <https://maplibre.org/maplibre-gl-js/docs/examples/cluster/>
+
+---
+
 ## Pop-ups
 
 Leaflet/MapLibre offer a simple API for adding pop-ups to features.