geopandas.GeoSeries.convex_hull

property GeoSeries.convex_hull

返回一个 GeoSeries，表示每个几何图形的凸包。

几何的凸包是包含每个几何中所有点的最小凸多边形，除非几何对象中的点数少于三个。对于两个点，凸包缩减为线串；对于一个点，缩减为点。

另请参阅

GeoSeries.concave_hull

凹壳几何

GeoSeries.envelope

边界矩形几何

示例

>>> from shapely.geometry import Polygon, LineString, Point, MultiPoint
>>> s = geopandas.GeoSeries(
...     [
...         Polygon([(0, 0), (1, 1), (0, 1)]),
...         LineString([(0, 0), (1, 1), (1, 0)]),
...         MultiPoint([(0, 0), (1, 1), (0, 1), (1, 0), (0.5, 0.5)]),
...         MultiPoint([(0, 0), (1, 1)]),
...         Point(0, 0),
...     ]
... )
>>> s
0                       POLYGON ((0 0, 1 1, 0 1, 0 0))
1                           LINESTRING (0 0, 1 1, 1 0)
2    MULTIPOINT ((0 0), (1 1), (0 1), (1 0), (0.5 0...
3                            MULTIPOINT ((0 0), (1 1))
4                                          POINT (0 0)
dtype: geometry

>>> s.convex_hull
0         POLYGON ((0 0, 0 1, 1 1, 0 0))
1         POLYGON ((0 0, 1 1, 1 0, 0 0))
2    POLYGON ((0 0, 0 1, 1 1, 1 0, 0 0))
3                  LINESTRING (0 0, 1 1)
4                            POINT (0 0)
dtype: geometry