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9 lines
399 B
JavaScript
9 lines
399 B
JavaScript
const analyzeGPS = async (readings, boundary) => {
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const { booleanPointInPolygon, point, lineString, length } = await import('https://esm.sh/@turf/turf');
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const valid = readings
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.filter(r => booleanPointInPolygon(point(r.loc), boundary))
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.sort((a, b) => a.ts - b.ts);
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return valid.length < 2 ? 0 : +length(lineString(valid.map(r => r.loc))).toFixed(2);
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};
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export default analyzeGPS; |