41:null 42:["$","title",null,{"children":"Chicago Census Blocks | Hugh | Observable"}] 48:T459,censusBlocksSvg = function(geoJsonFeaturesCollection) { const height = 1.3 * width; const projection = d3.geoMercator() .fitSize([width, height], geoJsonFeaturesCollection); const pathGenerator = d3.geoPath() .projection(projection); const svg = d3.create('svg') .attr("viewBox", [0, 0, width, height]); const g = svg.append('g') .selectAll('path') .data(geoJsonFeaturesCollection.features) .enter() .append('path') .attr('d', pathGenerator) .attr('fill', d => 'lightSkyBlue') .append('title') .text(d => { const properties = d.properties; const state = d3.format("02d")(properties.census_b_1.slice(0, 2)); const county = d3.format("03d")(properties.census_b_1.slice(2, 5)); const tract = d3.format("04d")(properties.census_tra.slice(0, 4)); const suffix = d3.format("02d")(properties.census_tra.slice(-2)); const block = d3.format("04d")(properties.census_blo); return state + '-' + county + '-' + tract + '.' + suffix + '-' + block; }) return svg.node(); }49:[] 46:{"id":"6d348c693a98be0f","slug":"chicago-census-blocks","title":"Chicago Census Blocks","thumbnail":"5805a8351c8543323899a4353875ba27f0ee3bc9ef17ba76c341b5b6fdde0628","access_level":"public","create_time":"$D2020-12-06T21:35:34.046Z","update_time":"$D2020-12-16T04:03:38.801Z","view_time":null,"first_public_time":"$D2020-12-06T21:59:25.011Z","has_unpublished_edits":null,"fork":{"id":"69c5d45bb4ffa3fe","slug":"chicago-census-tracts","title":"Chicago Census Tracts","owner":{"id":"19d63ba1bb706983","login":"hughdevlin","name":"Hugh"}},"stars":0,"starred":false,"owner":{"type":"team","id":"19d63ba1bb706983","login":"hughdevlin","name":"Hugh","avatar_url":"https://avatars-next.observableusercontent.com/3855a0736872056a5d9935eac93135690611be581eecc094283af2704b215a2b","tier":"starter_2024","bio":"","following":false},"version":77,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"ee6e4e8d8597a695","login":"hughdevlin","name":"Hugh","avatar_url":"https://avatars-next.observableusercontent.com/3855a0736872056a5d9935eac93135690611be581eecc094283af2704b215a2b","tier":null,"bio":"","following":false}],"members":[{"type":"individual","id":"ee6e4e8d8597a695","login":"hughdevlin","name":"Hugh","avatar_url":"https://avatars-next.observableusercontent.com/3855a0736872056a5d9935eac93135690611be581eecc094283af2704b215a2b","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":{"id":"4d78672ecf245912","slug":"chicago-data-portal","title":"Chicago Data Portal Maps","owner":{"id":"19d63ba1bb706983","login":"hughdevlin","name":"Hugh"}},"type":"notebook","body":{"titling":"auto","title":"Chicago Census Blocks","cells":[{"id":0,"value":"md`# Chicago Census Blocks `","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":35,"value":"html `

${censusBlocksSvg(chicagoCensusBlocksGeoJson)}

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This work by Hugh J Devlin CC BY 4.0