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13 lines
476 B
JavaScript
13 lines
476 B
JavaScript
let turf$;
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const useTurf = () => turf$ ??= import('https://cdn.skypack.dev/@turf/turf?min');
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async function analyzeGPS(readings, boundary) {
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const t = await useTurf();
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const pts = readings
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.filter(r => t.booleanPointInPolygon(t.point(r.loc), boundary))
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.sort((a, b) => a.ts - b.ts);
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if (pts.length < 2) return 0;
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const km = t.length(t.lineString(pts.map(r => r.loc)), { units: 'kilometers' });
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return Math.round(km * 100) / 100;
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}
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export default analyzeGPS; |