I want to create a map of Africa using d3.js and topoJSON. I have this data source https://gist.githubusercontent.com/bricedev/3905007f1794b0cb0bcd/raw/ad5c995f6990f7c3c7fad5c6206bc6fd5462f1fb/africa.json
This is my code. How can I get properties and create the correct map? Please help me, where is the mistake?
<!DOCTYPE html>
<html>
<head>
<meta name="description" content="D3byEX 12.15" />
<meta charset="utf-8">
</head>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script>
var width = 1000, height = 728;
var svg = d3.select("body").append("svg")
.attr({ width: width, height: height });
var mainGroup = svg.append("g");
mainGroup.style({ stroke: "white", "stroke-width": "2px", "stroke-opacity": 0.0 });
var projection = d3.geo.mercator();
var path = d3.geo.path().projection(projection);
var url = 'https://gist.githubusercontent.com/bricedev/3905007f1794b0cb0bcd/raw/ad5c995f6990f7c3c7fad5c6206bc6fd5462f1fb/africa.json';
d3.json(url, function (error, africa) {
var countries = topojson.feature(africa, africa.objects.countries).features;
var neighbors = topojson.neighbors(africa.objects.countries.geometries);
var color = d3.scale.category20();
mainGroup.selectAll("path", "countries")
.data(countries)
.enter().append("path")
.attr("d", path)
.style("fill", function (d, i) {
return color(d.color = d3.max(neighbors[i],
function (n) { return countries[n].color; }) + 1 | 0);
});
mainGroup.selectAll("path")
.on("mouseover", function () {
console.log("mouseover");
d3.select(this).style("stroke-opacity", 1.0);
});
mainGroup.selectAll("path")
.on("mouseout", function () {
d3.select(this).style("stroke-opacity", 0.0);
});
});
</script>
source
share