30:[{"id":"6b1776f5a0a0e76e6428805c0074a8f262e3f34b1b50944da27903e014b409958dc29b03a1c9cc331949d6a2a404c19dfd0d9d36d9c32274e6ffbc07c11350ee","href":"https://static.observableusercontent.com/files/6b1776f5a0a0e76e6428805c0074a8f262e3f34b1b50944da27903e014b409958dc29b03a1c9cc331949d6a2a404c19dfd0d9d36d9c32274e6ffbc07c11350ee","name":"counties-albers-10m.json","type":"application/octet-stream","lastModified":1614811796417.379,"size":795407}] 2e:{"title":"D3 U.S. map","cells":[{"id":0,"value":"# D3 U.S. map","pinned":false,"hidden":false,"mode":"md"},{"id":29,"value":"map = htl.html``","pinned":true,"hidden":false,"mode":"ojs"},{"id":47,"value":"path = d3.geoPath()","pinned":true,"hidden":false,"mode":"ojs"},{"id":104,"value":"states = topojson.mesh(us, us.objects.states, (a, b) => a !== b)","pinned":true,"hidden":false,"mode":"ojs"},{"id":108,"value":"nation = topojson.feature(us, us.objects.nation)","pinned":true,"hidden":false,"mode":"ojs"},{"id":101,"value":"counties = topojson.mesh(us, us.objects.counties, (a, b) => a !== b && (a.id / 1000 | 0) === (b.id / 1000 | 0))","pinned":true,"hidden":false,"mode":"ojs"},{"id":13,"value":"us = FileAttachment(\"counties-albers-10m.json\").json() // Already projected to Albers-USA!","pinned":true,"hidden":false,"mode":"ojs"},{"id":7,"value":"d3 = require(\"d3-geo@3\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":121,"value":"If you need to project data to this map, and have longitude, latitude pairs, use the following projection:","pinned":false,"hidden":false,"mode":"md"},{"id":37,"value":"projection = d3.geoAlbersUsa().scale(1300).translate([487.5, 305])","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W30","stdlib":"1","titling":"auto"}