d3.hello/5.basic_map.html at master · eva1721/d3.hello · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Basic Map</title>
    <script src="js/d3.v5.min.js"></script>
    <style>
        body {
            margin: 0;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
        }

        svg {
            width: 1000px;
            height: 800px;
        }
    </style>
</head>
<body>
<!-- http://bl.ocks.org/almccon/fe445f1d6b177fd0946800a48aa59c71 -->
<script>
let width = 500
let height = 480

let svg = d3.select("body").append("svg")

let projection = d3.geoMercator()
    .scale(width / 2 / Math.PI)
    .translate([width / 2, height / 2])

let path = d3.geoPath()
    .projection(projection)

let url = "data/world-110m.geojson"

d3.json(url).then((geojson) => {
    svg.append("path")
        .attr("d", path(geojson))
})

</script>
</body>
</html>