{
const junctions = new NumMap(CoordNum.fromXy);
junctions.set([10, 10], "potato");
return junctions.get([10,10,10]);
}
async function buildTopology(traceResult, options) {
options = Object.assign({ smooth: true }, options);
options.round ??= options.smooth;
const geojson = await buildGeoJsonRaw(traceResult);
let topology = topojson.topology({traced: geojson});
topology.properties = { options };
topology.bbox = traceResult.bbox;
if (options.smooth) {
smoothTopology(topology, traceResult.coordClasses);
// Remove unneeded points
const simplified = topojson.presimplify(topology);
simplified.arcs.flat()
.filter(c => c[2] == 0 && traceResult.coordClasses.get(c) == "junction")
.forEach(c => c[2] = Infinity);
topology = topojson.simplify(simplified, 0.5 / smoothTopology.roundFactor);
// Round to int
if (options.round) scaleTopology(topology, smoothTopology.roundFactor);
}
return topology;
}
li = new LoadIndicator(sampleImage);
li.canvas
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
