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11 lines
451 B
JavaScript
11 lines
451 B
JavaScript
const analyzeGPS = async (readings, boundary) => {
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const t = await import('https://cdn.jsdelivr.net/npm/@turf/turf/+esm');
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const pts = readings
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.filter(({ loc }) => t.booleanPointInPolygon(t.point(loc), boundary, { ignoreBoundary: true }))
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.sort((a, b) => a.ts - b.ts)
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.map(({ loc }) => loc);
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return pts.length < 2 ? 0 :
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Math.round(t.length(t.lineString(pts), { units: 'kilometers' }) * 100) / 100;
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};
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export default analyzeGPS; |