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14 lines
466 B
JavaScript
14 lines
466 B
JavaScript
const analyzeGPS = async (readings, boundary) => {
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const turf = await import('https://esm.sh/@turf/turf@7.1.0');
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const validReadings = readings
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.filter(r => turf.booleanPointInPolygon(turf.point(r.loc), boundary))
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.sort((a, b) => a.ts - b.ts);
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if (validReadings.length < 2) return 0;
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const lineString = turf.lineString(validReadings.map(r => r.loc));
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return Math.round(turf.length(lineString) * 100) / 100;
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};
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export default analyzeGPS; |