md`# Vascular chart of San Francisco
Different levels of road infrastructure portrayed as the vascular system.
Data: Open Street Map`
chart = {
const svg = d3.create("svg").attr("viewBox", [0, 0, width, height]);
//Container for the gradients
var defs = svg.append("defs");
//Filter for the outside glow
// var filter = defs.append("filter").attr("id", "glow");
// filter
// .append("feGaussianBlur")
// .attr("stdDeviation", "2")
// .attr("result", "coloredBlur");
// var feMerge = filter.append("feMerge");
// feMerge.append("feMergeNode").attr("in", "coloredBlur");
// feMerge.append("feMergeNode").attr("in", "SourceGraphic");
svg
.append('rect')
.attr('width', width)
.attr('height', height)
.attr('fill', 'black');
svg
.append('g')
.selectAll('path')
.data(aggDataGeoJSON.features)
.enter()
.append("path")
.attr("fill", 'none')
.attr("stroke", "red")
.attr("stroke-linejoin", "round")
.attr('class', d => d.properties.highway)
.attr('opacity', d => {
if (
d.properties.highway == 'motorway' ||
d.properties.highway == 'trunk'
) {
return 0.95;
} else if (d.properties.highway == 'primary') {
return 0.9;
} else if (d.properties.highway == 'secondary') {
return 0.8;
} else if (d.properties.highway == 'tertiary') {
return 0.7;
} else if (d.properties.highway == 'residential') {
return 0.6;
} else {
return 0.4;
}
})
.attr('stroke-width', d => {
if (
d.properties.highway == 'motorway' ||
d.properties.highway == 'trunk'
) {
return 3;
} else if (d.properties.highway == 'primary') {
return 1.5;
} else if (d.properties.highway == 'secondary') {
return 0.6;
} else if (d.properties.highway == 'tertiary') {
return 0.4;
} else if (d.properties.highway == 'residential') {
return 0.3;
} else {
return 0.2;
}
})
// .style("filter", d => {
// if (
// d.properties.highway == 'motorway' ||
// d.properties.highway == 'trunk'
// ) {
// return "url(#glow)";
// }
// })
.attr("d", path);
return svg.node();
}
[...new Set(d3.map(aggDataGeoJSON.features, d => d.properties.highway))]
aggDataGeoJSON = topojson.feature(aggData, aggData.objects.sf2)
// aggDataGeoJSON = topojson.mesh(aggData, aggData.objects.sf2)
//aggData = JSON.parse(await FileAttachment('sf.all.topojson').text())
aggData = JSON.parse(await FileAttachment('sf.all.trimmed.topojson').text())
// canvas = {
// const context = DOM.context2d(width, height * 1.1);
// const path = d3.geoPath(null, context);
// context.canvas.style.maxWidth = "100%";
// context.lineJoin = "round";
// context.lineCap = "round";
// context.fillStyle = "black";
// context.fillRect(0, 0, width, height * 1.1);
// var geoGenerator = d3
// .geoPath()
// .pointRadius(5)
// .projection(projection)
// .context(context);
// context.strokeStyle = "red";
// context.beginPath();
// context.lineWidth = 3;
// geoGenerator({ type: 'FeatureCollection', features: data.features });
// context.stroke();
// context.beginPath();
// context.lineWidth = 3;
// geoGenerator({ type: 'FeatureCollection', features: trunk.features });
// context.stroke();
// context.beginPath();
// context.lineWidth = 1;
// geoGenerator({
// type: 'FeatureCollection',
// features: primary.features
// });
// context.stroke();
// context.beginPath();
// context.lineWidth = 0.6;
// geoGenerator({
// type: 'FeatureCollection',
// features: secondary.features
// });
// context.stroke();
// context.beginPath();
// context.lineWidth = 0.4;
// geoGenerator({
// type: 'FeatureCollection',
// features: tertiary.features
// });
// context.stroke();
// context.beginPath();
// context.lineWidth = 0.3;
// geoGenerator({
// type: 'FeatureCollection',
// features: residential.features
// });
// context.stroke();
// return context.canvas;
// }
path = d3.geoPath().projection(projection)
height = 600
projection = d3.geoMercator().fitSize([width, height], data)
// residential = JSON.parse(await FileAttachment('sf.residential.geojson').text())
data = JSON.parse(await FileAttachment('sf.motorway@1.geojson').text())
// secondary = JSON.parse(await FileAttachment('sf.secondary.geojson').text())
// tertiary = JSON.parse(await FileAttachment('sf.tertiary.geojson').text())
// trunk = JSON.parse(await FileAttachment('sf.trunk.geojson').text())
// primary = JSON.parse(await FileAttachment('sf.primary.geojson').text())
topojson = require("topojson-client@3")
d3 = require('d3@6')
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