Basic D3 map (live mods) d3v4

A basic map in D3 using some projection from here: https://github.com/d3/d3/blob/master/API.md#geographies-d3-geo

Built with blockbuilder.org

forked from enjalot's block: WWSD #6: d3.js projections

forked from almccon's block: Basic D3 map (Mercator)

forked from almccon's block: Basic D3 map (Mercator) d3v4

forked from almccon's block: Basic D3 map (Robinson) d3v4

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="//d3js.org/d3.v4.js"></script>
  <script src="//d3js.org/d3-geo-projection.v2.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg { width:100%; height: 100% }
  </style>
</head>

<body>
  <script>
    var width = 800;
    var height = 500;
    
    var svg = d3.select("body").append("svg")
    
    var projection = d3.geoStereographic()
      .scale(width / 2 / Math.PI)
      .scale(200)
      .translate([width / 2, height / 2])

var path = d3.geoPath()
      .projection(projection);
    
    var url = "https://enjalot.github.io/wwsd/data/world/world-110m.geojson";
    var url2 = "https://enjalot.github.io/wwsd/data/world/ne_50m_populated_places_simple.geojson";
    d3.json(url, function(err, world_geojson) {
    	d3.json(url2, function(err, places_geojson) {

svg.append("path")
        	.attr("d", path(world_geojson))
					.attr("fill","lightgray")
        
        svg.selectAll("circle")
          .data(places_geojson.features)
        .enter()
      		.append("circle")
      		.attr("r", function(d) {
          	console.log(d);
            return d.properties.pop_max/1000000;
        	})
      		.attr('cx',function(d) {
          	return projection(d.geometry.coordinates)[0]  
        	})
        	.attr('cy',function(d) {
          	return projection(d.geometry.coordinates)[1]  
        	})
        	.attr("fill",function(d) {
            if(d.properties.megacity == 1) {
              return "darkgreen";
            } else {
              return "salmon";
            }
        	})
          .attr("opacity",0.5)
        		
    	})
    })
    
  </script>
</body>

https://d3js.org/d3.v4.js

https://d3js.org/d3-geo-projection.v2.min.js