geometry.py 文件源码

def cut_ring(ring: LinearRing) -> List[LinearRing]:
    rings = []
    new_ring = []
    # noinspection PyPropertyAccess
    for point in ring.coords:
        try:
            index = new_ring.index(point)
        except ValueError:
            new_ring.append(point)
            continue

        if len(new_ring) > 2+index:
            rings.append(LinearRing(new_ring[index:]+[point]))
        new_ring = new_ring[:index+1]

    return rings