Function closestPointOnPolylines

closestPointOnPolylines(p, lines): {
    closestIndex: number;
    closestLength: number;
    closestPoint: GeoPoint;
    closestPointIndex: number;
    closestPrePointDist: number;
}
点到多条线的最近点
Parameters
- p: GeoPoint
- lines: GeoPoint[][]
Returns {
    closestIndex: number;
    closestLength: number;
    closestPoint: GeoPoint;
    closestPointIndex: number;
    closestPrePointDist: number;
}
- closestIndex: number
- closestLength: number
- closestPoint: GeoPoint
- closestPointIndex: number
- closestPrePointDist: number