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