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12 lines
393 B
JavaScript
12 lines
393 B
JavaScript
const analyzeGPS = async (readings, boundary) => {
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const T = await import('https://esm.sh/@turf/turf')
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const valid = 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 (valid.length < 2) return 0
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const line = T.lineString(valid.map(v => v.loc))
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return Math.round(T.length(line) * 1e2) / 1e2
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}
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export default analyzeGPS; |