Published
Edited
Dec 8, 2020
md`# Places of worship USA
Data: OpenStreetMap
`
placesOfWorship = {
const svg = DOM.svg(width, height);
const mainGroup = d3.select(svg).append('g');
//d3.select(svg)
const defs = d3.select(svg).append('defs');
defs
.append('clipPath')
.attr('id', 'clip-us')
.append('path')
.attr('d', path(us));
mainGroup.attr('clip-path', 'url(#clip-us)');
mainGroup
.selectAll('path')
.data(hex.grid.layout)
.enter()
.append('path')
.attr('d', hex.hexagon())
.attr('transform', d => `translate(${d.x} ${d.y})`)
.style('fill', d =>
!d.pointDensity ? marketColours(0) : marketColours(d.pointDensity)
);
//.style('stroke', '#ccc');
// .style('stroke-width', 0);
// .append('title')
// .text(d => `${JSON.stringify(d)}`);
return svg;
}
[...hex.grid.extentPointDensity].reverse()
marketColours = d3
.scaleSequential(t => {
var tNew = Math.pow(t, 20);
return d3.interpolateViridis(1 - tNew);
})
.domain([...hex.grid.extentPointDensity].reverse())
[...hex.grid.extentPointDensity].reverse()
c = ({
fillLand: '#f8f8f8',
fillLandDark: '#eee',
strokeLand: '#bbb',
strokeLandLight: '#ddd',
fillHex: 'cornflowerblue',
fillHexVeryLight: '#d0dff9',
fillHexLight: '#a2bff4',
fillHexDark: '#3c598e',
strokeHex: '#999'
})
height = 600
path = d3.geoPath().projection(projection)
projection = d3.geoAlbers().fitSize([width * 0.9, height * 0.9], us)
us = await d3.json(
'https://raw.githubusercontent.com/larsvers/map-store/master/us_mainland_geo.json'
)
data = (await FileAttachment('worship.json').json()).features.map(d => {return {'lat':d.coordinates[1],'lng':d.coordinates[0]}})
hex.grid
hex = hexgrid(data, ['lat', 'lng']) //preserve lat/lng props
hexgrid = d3
.hexgrid()
.extent([width, height])
.geography(us)
.projection(projection)
.pathGenerator(path)
.hexRadius(r)
// hexbin = d3
// .hexbin()
// .extent([[0, 0], [width, height]])
// .radius(r)
d3 = require('d3-array', 'd3-color', 'd3-drag', 'd3-ease', 'd3-fetch', 'd3-format', 'd3-geo', 'd3-hexbin', 'd3-hexgrid', 'd3-interpolate', 'd3-scale', 'd3-scale-chromatic', 'd3-selection', 'd3-shape', 'd3-zoom')
topojson = require('topojson@3')
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