30:Tbff,function geoAlbersUsaPr() { var cache, cacheStream, lower48 = d3.geoAlbers(), lower48Point, alaska = d3.geoConicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, hawaii = d3.geoConicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, puertoRico = d3.geoConicEqualArea().rotate([66, 0]).center([0, 18]).parallels([8, 18]), puertoRicoPoint, point, pointStream = {point: function(x, y) { point = [x, y]; }}; function albersUsa(coordinates) { var x = coordinates[0], y = coordinates[1]; return point = null, (lower48Point.point(x, y), point) || (alaskaPoint.point(x, y), point) || (hawaiiPoint.point(x, y), point) || (puertoRicoPoint.point(x, y), point); } albersUsa.invert = function(coordinates) { var k = lower48.scale(), t = lower48.translate(), x = (coordinates[0] - t[0]) / k, y = (coordinates[1] - t[1]) / k; return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii : y >= 0.204 && y < 0.234 && x >= 0.320 && x < 0.380 ? puertoRico : lower48).invert(coordinates); }; albersUsa.stream = function(stream) { return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream), puertoRico.stream(stream)]); }; albersUsa.precision = function(_) { if (!arguments.length) return lower48.precision(); lower48.precision(_), alaska.precision(_), hawaii.precision(_), puertoRico.precision(_); return reset(); }; albersUsa.scale = function(_) { if (!arguments.length) return lower48.scale(); lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_), puertoRico.scale(_); return albersUsa.translate(lower48.translate()); }; albersUsa.translate = function(_) { if (!arguments.length) return lower48.translate(); var k = lower48.scale(), x = +_[0], y = +_[1]; lower48Point = lower48 .translate(_) .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]]) .stream(pointStream); alaskaPoint = alaska .translate([x - 0.307 * k, y + 0.201 * k]) .clipExtent([[x - 0.425 * k + epsilon, y + 0.120 * k + epsilon], [x - 0.214 * k - epsilon, y + 0.234 * k - epsilon]]) .stream(pointStream); hawaiiPoint = hawaii .translate([x - 0.205 * k, y + 0.212 * k]) .clipExtent([[x - 0.214 * k + epsilon, y + 0.166 * k + epsilon], [x - 0.115 * k - epsilon, y + 0.234 * k - epsilon]]) .stream(pointStream); puertoRicoPoint = puertoRico .translate([x + 0.350 * k, y + 0.224 * k]) .clipExtent([[x + 0.320 * k, y + 0.204 * k], [x + 0.380 * k, y + 0.234 * k]]) .stream(pointStream).point; return reset(); }; function reset() { cache = cacheStream = null; return albersUsa; } return albersUsa.scale(1070); }31:[{"id":"8326f37ebb0e430088bde96410bb0426ff6a71b3a592bb20987200ca00f8be73a0083b26ab17cb714ce111f936f695b96e77faffc560a0071d839e0742bb54f5","href":"https://static.observableusercontent.com/files/8326f37ebb0e430088bde96410bb0426ff6a71b3a592bb20987200ca00f8be73a0083b26ab17cb714ce111f936f695b96e77faffc560a0071d839e0742bb54f5","name":"counties-10m.json","type":"application/octet-stream","lastModified":1572391561214.514,"size":842177}] 2e:{"title":"U.S. Map with Puerto Rico","cells":[{"id":0,"value":"md`# U.S. Map with Puerto Rico\n\nThis map modifies D3’s U.S. Albers projection (a [conic equal-area](/@d3/conic-equal-area) projection), which has insets for Alaska and Hawaii, to also inset Puerto Rico.`","pinned":false,"hidden":false,"mode":"ojs"},{"id":37,"value":"projection = geoAlbersUsaPr().scale(1300).translate([487.5, 305])","pinned":true,"hidden":false,"mode":"ojs"},{"id":29,"value":"map = html``","pinned":true,"hidden":false,"mode":"ojs"},{"id":47,"value":"path = d3.geoPath(projection)","pinned":true,"hidden":false,"mode":"ojs"},{"id":100,"value":"$30","pinned":true,"hidden":false,"mode":"ojs"},{"id":95,"value":"function multiplex(streams) {\n const n = streams.length;\n return {\n point(x, y) { for (const s of streams) s.point(x, y); },\n sphere() { for (const s of streams) s.sphere(); },\n lineStart() { for (const s of streams) s.lineStart(); },\n lineEnd() { for (const s of streams) s.lineEnd(); },\n polygonStart() { for (const s of streams) s.polygonStart(); },\n polygonEnd() { for (const s of streams) s.polygonEnd(); }\n };\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":109,"value":"epsilon = 1e-6","pinned":true,"hidden":false,"mode":"ojs"},{"id":13,"value":"us = FileAttachment(\"counties-10m.json\").json()","pinned":true,"hidden":false,"mode":"ojs"},{"id":10,"value":"topojson = require(\"topojson-client@3\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":7,"value":"d3 = require(\"d3-geo@2\")","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}