New Year's Resolution for 2017: Make a D3 Block a day to teach myself D3. This is Number 21. This example extends the January 11 Example Rhode Island click-to-zoom example to be a full chloropleth with the colors indicating number of tested students. The topoJSON files used to construct this visualization were created by me using shape files provided by the United States Census Bureau. The Center for Assessment makes these state and national school district topoJSON files available for anyone to use in their own development.
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January 27, 2017 01:36
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D3 Block-a-Day: Day 21, January 21st, 2017
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| license:gpl-3.0 | |
| height:600 | |
| border:no | |
| Raw |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <head> | |
| <title>D3 Block-a-Day: Day 11, January 11, 2017</title> | |
| <style> | |
| .background { | |
| fill: none; | |
| pointer-events: all; | |
| } | |
| #districts { | |
| fill: #ccc; | |
| } | |
| #districts .active { | |
| fill: orange; | |
| } | |
| #district-borders { | |
| fill: none; | |
| stroke: white; | |
| stroke-width: 1px; | |
| stroke-linejoin: round; | |
| stroke-linecap: round; | |
| pointer-events: none; | |
| } | |
| .hidden { | |
| display: none; | |
| } | |
| div.tooltip { | |
| background-color: #ffffff; | |
| padding: 7px; | |
| text-shadow: #f5f5f5 0 1px 0; | |
| font: 13px Helvetica Neue; | |
| border: 2.5px solid; | |
| border-color: black; | |
| border-radius: 3px; | |
| opacity: 0.9; | |
| position: absolute; | |
| box-shadow: rgba(0, 0, 0, 0.3) 0 2px 10px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script src="//d3js.org/d3.v4.min.js"></script> | |
| <script src="//d3js.org/topojson.v1.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 600, | |
| centered; | |
| var projection = d3.geoMercator() | |
| .center([ -71.5, 41.7 ]) | |
| .scale(24000); | |
| var path = d3.geoPath() | |
| .projection(projection); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| svg.append("rect") | |
| .attr("class", "background") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .on("click", clicked); | |
| var tooltip = d3.select('body').append('div') | |
| .attr('class', 'hidden tooltip'); | |
| var g = svg.append("g"); | |
| d3.json("RI_Districts.topojson", function(error, state_districts) { | |
| if (error) throw error; | |
| g.append("g") | |
| .attr("id", "districts") | |
| .selectAll("path") | |
| .data(topojson.feature(state_districts, state_districts.objects.districts).features) | |
| .enter().append("path") | |
| .attr("d", path) | |
| .on("click", clicked) | |
| .on('mousemove', function(d) { | |
| var mouse = d3.mouse(svg.node()).map(function(d) { | |
| return parseInt(d); | |
| }); | |
| tooltip.classed('hidden', false) | |
| .attr('style', 'left:' + (mouse[0] + 10) +'px; top:' + (mouse[1] - 20) + 'px') | |
| .html(d.properties.name); | |
| }) | |
| .on('mouseout', function() { | |
| tooltip.classed('hidden', true); | |
| });; | |
| g.append("path") | |
| .datum(topojson.mesh(state_districts, state_districts.objects.districts, function(a, b) { return a !== b; })) | |
| .attr("id", "district-borders") | |
| .attr("d", path); | |
| }); | |
| function clicked(d) { | |
| var x, y, k; | |
| if (d && centered !== d) { | |
| var centroid = path.centroid(d); | |
| x = centroid[0]; | |
| y = centroid[1]; | |
| k = 4; | |
| centered = d; | |
| } else { | |
| x = width / 2; | |
| y = height / 2; | |
| k = 1; | |
| centered = null; | |
| } | |
| g.selectAll("path") | |
| .classed("active", centered && function(d) { return d === centered; }); | |
| g.transition() | |
| .duration(750) | |
| .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")scale(" + k + ")translate(" + -x + "," + -y + ")") | |
| .style("stroke-width", 1.5 / k + "px"); | |
| } | |
| </script> |
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| {"type":"Topology","transform":{"scale":[0.00007909330933093269,0.00009230583058305855],"translate":[-71.907258,41.095833999999996]},"objects":{"districts":{"type":"GeometryCollection","geometries":[{"type":"Polygon","arcs":[[0,1,2,3,4,5,6]],"properties":{"name":"Foster-Glocester Regional School District","state":"44"}},{"type":"Polygon","arcs":[[7,8,9,10,11,12]],"properties":{"name":"Exeter-West Greenwich Regional School District","state":"44"}},{"type":"Polygon","arcs":[[13,2,3,4]],"properties":{"name":"Foster Elementary School District","state":"44"}},{"type":"Polygon","arcs":[[0,1,-14,5,6]],"properties":{"name":"Glocester Elementary School District","state":"44"}},{"type":"Polygon","arcs":[[14,15,16,17,18,19]],"properties":{"name":"Jamestown School District","state":"44"}},{"type":"Polygon","arcs":[[20,21,22]],"properties":{"name":"Little Compton School District","state":"44"}},{"type":"Polygon","arcs":[[23,24,25,26,27]],"properties":{"name":"Barrington School District","state":"44"}},{"type":"Polygon","arcs":[[-26,28,29,30]],"properties":{"name":"Bristol-Warren Regional School District","state":"44"}},{"type":"Polygon","arcs":[[31,-7,32]],"properties":{"name":"Burrillville School District","state":"44"}},{"type":"Polygon","arcs":[[33,34,35]],"properties":{"name":"Central Falls School District","state":"44"}},{"type":"Polygon","arcs":[[36,-12,37,38,39]],"properties":{"name":"Chariho Regional School District","state":"44"}},{"type":"Polygon","arcs":[[40,41,42,43,-8,44,-4]],"properties":{"name":"Coventry School District","state":"44"}},{"type":"Polygon","arcs":[[45,46,47,48,49,-42,50]],"properties":{"name":"Cranston School District","state":"44"}},{"type":"Polygon","arcs":[[51,-34,52,53]],"properties":{"name":"Cumberland School District","state":"44"}},{"type":"Polygon","arcs":[[54,55,56,-9,-44]],"properties":{"name":"East Greenwich School District","state":"44"}},{"type":"Polygon","arcs":[[57,58,-24,59,-48,60]],"properties":{"name":"East Providence School District","state":"44"}},{"type":"Polygon","arcs":[[61,62,-46,63,64]],"properties":{"name":"Johnston School District","state":"44"}},{"type":"Polygon","arcs":[[65,-53,-36,66,67,68]],"properties":{"name":"Lincoln School District","state":"44"}},{"type":"Polygon","arcs":[[69,70,71,-17]],"properties":{"name":"Middletown School District","state":"44"}},{"type":"Polygon","arcs":[[72,-20,73,74]],"properties":{"name":"Narragansett School District","state":"44"}},{"type":"Polygon","arcs":[[75]],"properties":{"name":"New Shoreham School District","state":"44"}},{"type":"Polygon","arcs":[[-72,76,-18]],"properties":{"name":"Newport School District","state":"44"}},{"type":"Polygon","arcs":[[77,78,-15,-73,79,-10,-57]],"properties":{"name":"North Kingstown School District","state":"44"}},{"type":"Polygon","arcs":[[-68,80,81,-62,82]],"properties":{"name":"North Providence School District","state":"44"}},{"type":"Polygon","arcs":[[83,84,-66,85,-32]],"properties":{"name":"North Smithfield School District","state":"44"}},{"type":"Polygon","arcs":[[-67,-35,86,-58,87,-81]],"properties":{"name":"Pawtucket School District","state":"44"}},{"type":"Polygon","arcs":[[88,-27,-31,89,-23,90,-70,-16,-79]],"properties":{"name":"Portsmouth School District","state":"44"}},{"type":"Polygon","arcs":[[-82,-88,-61,-47,-63]],"properties":{"name":"Providence School District","state":"44"}},{"type":"Polygon","arcs":[[-2,-64,-51,-41,-3]],"properties":{"name":"Scituate School District","state":"44"}},{"type":"Polygon","arcs":[[-86,-69,-83,-65,-1]],"properties":{"name":"Smithfield School District","state":"44"}},{"type":"Polygon","arcs":[[-11,-80,-75,91,-38]],"properties":{"name":"South Kingstown School District","state":"44"}},{"type":"Polygon","arcs":[[-30,92,-21,-90]],"properties":{"name":"Tiverton School District","state":"44"}},{"type":"Polygon","arcs":[[-49,-60,-28,-89,-78,-56,93]],"properties":{"name":"Warwick School District","state":"44"}},{"type":"Polygon","arcs":[[-50,-94,-55,-43]],"properties":{"name":"West Warwick School District","state":"44"}},{"type":"Polygon","arcs":[[-40,94]],"properties":{"name":"Westerly School District","state":"44"}},{"type":"Polygon","arcs":[[95,-54,-85]],"properties":{"name":"Woonsocket School District","state":"44"}}]}},"arcs":[[[4010,9081],[188,-819]],[[4198,8262],[-1464,-22]],[[2734,8240],[294,-1398]],[[3028,6842],[-1543,-32]],[[1485,6810],[-63,1408]],[[1422,8218],[-38,803]],[[1384,9021],[2626,60]],[[1517,6069],[3042,59]],[[4559,6128],[305,-639]],[[4864,5489],[184,-1111]],[[5048,4378],[-1330,275]],[[3718,4653],[-97,420],[-2157,-200]],[[1464,4873],[53,1196]],[[1422,8218],[1312,22]],[[6267,4426],[304,1075]],[[6571,5501],[934,-380]],[[7505,5121],[23,-503]],[[7528,4618],[-629,-623]],[[6899,3995],[-763,-170]],[[6136,3825],[131,601]],[[8676,4848],[1177,210]],[[9853,5058],[99,-851],[-1149,173]],[[8803,4380],[-127,468]],[[6852,6931],[600,438]],[[7452,7369],[423,-152]],[[7875,7217],[-564,-889]],[[7311,6328],[-26,76]],[[7285,6404],[-433,527]],[[7875,7217],[961,-775]],[[8836,6442],[-205,-266]],[[8631,6176],[-1320,152]],[[3805,9939],[205,-858]],[[1384,9021],[-19,862],[2440,56]],[[6485,8687],[160,-49]],[[6645,8638],[-289,-136]],[[6356,8502],[129,185]],[[1384,3477],[80,1396]],[[3718,4653],[227,-857],[-713,-1602]],[[3232,2194],[-982,-223]],[[2250,1971],[-21,1306],[-845,200]],[[3028,6842],[1546,29]],[[4574,6871],[144,1]],[[4718,6872],[23,-735]],[[4741,6137],[-182,-9]],[[1517,6069],[-32,741]],[[4395,7516],[1213,166]],[[5608,7682],[1081,-223]],[[6689,7459],[-2,-315]],[[6687,7144],[-1335,-255]],[[5352,6889],[-634,-17]],[[4574,6871],[-179,645]],[[5679,9987],[970,12],[-4,-1361]],[[6485,8687],[-1177,882]],[[5308,9569],[371,418]],[[4741,6137],[417,6]],[[5158,6143],[397,-312]],[[5555,5831],[-691,-342]],[[6734,8247],[509,46]],[[7243,8293],[209,-924]],[[6852,6931],[-165,213]],[[6689,7459],[45,788]],[[5206,8373],[288,-342]],[[5494,8031],[114,-349]],[[4395,7516],[-197,746]],[[4198,8262],[1008,111]],[[5274,9185],[34,384]],[[6356,8502],[-224,-23]],[[6132,8479],[-573,-64]],[[5559,8415],[-285,770]],[[7505,5121],[1016,-581]],[[8521,4540],[-665,-279]],[[7856,4261],[-328,357]],[[5779,4398],[488,28]],[[6136,3825],[-1107,-1529],[-831,143]],[[4198,2439],[1581,1959]],[[2888,683],[687,1249],[845,215],[1019,-1500],[-1702,-630],[-849,666]],[[7856,4261],[-957,-266]],[[5555,5831],[1103,175]],[[6658,6006],[-87,-505]],[[5779,4398],[-731,-20]],[[6132,8479],[59,-207]],[[6191,8272],[-697,-241]],[[5206,8373],[353,42]],[[3805,9939],[976,19]],[[4781,9958],[527,-389]],[[5274,9185],[-1264,-104]],[[6645,8638],[598,-345]],[[6734,8247],[-543,25]],[[6658,6006],[627,398]],[[8631,6176],[45,-1328]],[[8803,4380],[-282,160]],[[4198,2439],[-966,-245]],[[8836,6442],[958,-326],[59,-1058]],[[5158,6143],[194,746]],[[2250,1971],[-782,-1013],[-1468,1301],[1384,1218]],[[4781,9958],[898,29]]]} |
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