This is a simple setup of Leaflet (via Mapbox) with d3 to show dots on a map. This can serve as a base for many interesting geographically based visualizations
Nice overview of using d3 + Leaflet. I found this slightly simpler to use than Mike’s classic post.
Built with blockbuilder.org
forked from enjalot‘s block: dots on a map: setup-gl
forked from enjalot‘s block: dots on a map: setup-gl
forked from enjalot‘s block: WWSD #11: Mapbox-gl + d3 SVG overlay
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src="//d3js.org/topojson.v1.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.25.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.25.0/mapbox-gl.css' rel='stylesheet' />
<style>
body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
#map {
position:absolute;
width: 100%;
height: 100%;
}
svg {
position: absolute;
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
mapboxgl.accessToken = 'pk.eyJ1IjoicmNuIiwiYSI6Img2bS1ZTzAifQ.5JQpWlniPX4Y7wX_wn0F0w'
//Setup mapbox-gl map
var map = new mapboxgl.Map({
container: 'map', // container id
style: 'mapbox://styles/rcn/ciyt1qkl900202rqm6yg72vhb',
center: [-0.1,51.5119112],
zoom: 1.2,
})
//map.scrollZoom.disable()
map.addControl(new mapboxgl.Navigation());
// Setup our svg layer that we can manipulate with d3
var container = map.getCanvasContainer()
var svg = d3.select(container).append("svg")
// we calculate the scale given mapbox state (derived from viewport-mercator-project's code)
// to define a d3 projection
function getD3() {
var bbox = document.body.getBoundingClientRect();
var center = map.getCenter();
var zoom = map.getZoom();
// 512 is hardcoded tile size, might need to be 256 or changed to suit your map config
var scale = (512) * 0.5 / Math.PI * Math.pow(2, zoom);
var d3projection = d3.geo.mercator()
.center([center.lng, center.lat])
.translate([bbox.width/2, bbox.height/2])
.scale(scale);
return d3projection;
}
// calculate the original d3 projection
var d3Projection = getD3();
var path = d3.geo.path()
d3.csv("rims.csv", function(err, data) {
var dots = g.selectAll("circle.dot")
.data(data)
dots.enter().append("circle").classed("dot", true)
.attr("r", 1)
.style({
fill: "#0082a3",
"fill-opacity": 0.6,
stroke: "#004d60",
"stroke-width": 1
})
.transition().duration(1000)
.attr("r", 6)
function render() {
d3Projection = getD3();
path.projection(d3Projection)
dots
.attr({
cx: function(d) {
var x = d3Projection(d.geometry.coordinates)[0];
return x
},
cy: function(d) {
var y = d3Projection(d.geometry.coordinates)[1];
return y
},
})
}
// re-render our visualization whenever the view changes
map.on("viewreset", function() {
render()
})
map.on("move", function() {
render()
})
// render our initial visualization
render()
})
</script>
</body>
office,lat,lon
kl,3.139003,101.686855
nairobi,-1.292066, 36.821946
panama,9.028102, -79.484711
beirut,33.893791, 35.501777
budapest,47.497912, 19.040235
geneva,46.204391, 6.143158
{
"features": [
{
"type": "Feature",
"properties": {
"name": "Budapest"
},
"geometry": {
"coordinates": [
19.045744,
47.493125
],
"type": "Point"
},
"id": "87726805cc1df0acfa948ed75a5e56d1"
},
{
"type": "Feature",
"properties": {},
"geometry": {
"coordinates": [
6.094703,
46.219712
],
"type": "Point"
},
"id": "df4d15532d396c1b63dd181bda3dfeca"
},
{
"type": "Feature",
"properties": {
"name": "Nairobi"
},
"geometry": {
"coordinates": [
36.817335,
-1.284726
],
"type": "Point"
},
"id": "e9d82d8dd025f5232d6dc6b58a9e379e"
},
{
"type": "Feature",
"properties": {
"name": "Kuala Lumpur"
},
"geometry": {
"coordinates": [
101.696759,
3.151145
],
"type": "Point"
},
"id": "f1cee6a97f05357fa274459ec0ef251a"
},
{
"type": "Feature",
"properties": {
"name": "Panama City"
},
"geometry": {
"coordinates": [
-79.533584,
8.972428
],
"type": "Point"
},
"id": "f524e1c89b77083ade3d58c626134498"
}
],
"type": "FeatureCollection"
}