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D3 Rotating Globe with Location Marker

D3 Rotating Globe with Location Marker

This is a D3 (v4) based animated orthographic globe which alows you to plot markers from a given set of geo coordinates. This solution also allows you to set spinning speed and tilt shift parameter in a config object.

<!DOCTYPE html>
<html>
<body>
<svg></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://d3js.org/topojson.v1.min.js"></script>
<script>
const width = 960;
const height = 500;
const config = {
speed: 0.005,
verticalTilt: -30,
horizontalTilt: 0
}
let locations = [];
const svg = d3.select('svg')
.attr('width', width).attr('height', height);
const markerGroup = svg.append('g');
const projection = d3.geoOrthographic();
const initialScale = projection.scale();
const path = d3.geoPath().projection(projection);
const center = [width/2, height/2];
drawGlobe();
drawGraticule();
enableRotation();
function drawGlobe() {
d3.queue()
.defer(d3.json, 'https://gist.githubusercontent.com/mbostock/4090846/raw/d534aba169207548a8a3d670c9c2cc719ff05c47/world-110m.json')
.defer(d3.json, 'locations.json')
.await((error, worldData, locationData) => {
svg.selectAll(".segment")
.data(topojson.feature(worldData, worldData.objects.countries).features)
.enter().append("path")
.attr("class", "segment")
.attr("d", path)
.style("stroke", "#888")
.style("stroke-width", "1px")
.style("fill", (d, i) => '#e5e5e5')
.style("opacity", ".6");
locations = locationData;
drawMarkers();
});
}
function drawGraticule() {
const graticule = d3.geoGraticule()
.step([10, 10]);
svg.append("path")
.datum(graticule)
.attr("class", "graticule")
.attr("d", path)
.style("fill", "#fff")
.style("stroke", "#ccc");
}
function enableRotation() {
d3.timer(function (elapsed) {
projection.rotate([config.speed * elapsed - 120, config.verticalTilt, config.horizontalTilt]);
svg.selectAll("path").attr("d", path);
drawMarkers();
});
}
function drawMarkers() {
const markers = markerGroup.selectAll('circle')
.data(locations);
markers
.enter()
.append('circle')
.merge(markers)
.attr('cx', d => projection([d.longitude, d.latitude])[0])
.attr('cy', d => projection([d.longitude, d.latitude])[1])
.attr('fill', d => {
const coordinate = [d.longitude, d.latitude];
gdistance = d3.geoDistance(coordinate, projection.invert(center));
return gdistance > 1.57 ? 'none' : 'steelblue';
})
.attr('r', 7);
markerGroup.each(function () {
this.parentNode.appendChild(this);
});
}
</script>
</body>
</html>
MIT License
Copyright (c) 2018-2022 Atanu Mallick
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
[
{"latitude": 22, "longitude": 88},
{"latitude": 12.61315, "longitude": 38.37723},
{"latitude": -30, "longitude": -58},
{"latitude": -14.270972, "longitude": -170.132217},
{"latitude": 28.033886, "longitude": 1.659626},
{"latitude": 40.463667, "longitude": -3.74922},
{"latitude": 35.907757, "longitude": 127.766922},
{"latitude": 23.634501, "longitude": -102.552784}
]
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