polygons.py 文件源码

def polygon_hash(polygon):
    '''
    An approximate hash of a a shapely Polygon object.

    Arguments
    ---------
    polygon: shapely.geometry.Polygon object

    Returns
    ---------
    hash: (5) length list of hash representing input polygon
    '''
    result = [len(polygon.interiors),
              polygon.convex_hull.area,
              polygon.convex_hull.length,
              polygon.area, 
              polygon.length]
    return result