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11 lines
399 B
JavaScript
11 lines
399 B
JavaScript
export async function analyzeGPS(readings, boundary) {
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const { booleanPointInPolygon, lineString, length } = await import('https://cdn.skypack.dev/@turf/turf');
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const pts = readings
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.filter(r => booleanPointInPolygon(r.loc, boundary))
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.sort((a, b) => a.ts - b.ts)
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.map(r => r.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; |