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11 lines
453 B
JavaScript
11 lines
453 B
JavaScript
const analyzeGPS = async (readings, boundary) => {
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const { point, booleanPointInPolygon, lineString, length } = await import('https://cdn.jsdelivr.net/npm/@turf/turf/+esm');
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const path = readings
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.filter(({ loc }) => booleanPointInPolygon(point(loc), boundary, { ignoreBoundary: true }))
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.sort((a, b) => a.ts - b.ts)
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.map(r => r.loc);
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return path.length < 2 ? 0 : +length(lineString(path)).toFixed(2);
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};
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export default analyzeGPS; |