从Shapely中的多边形中提取点/坐标 [英] Extract points/coordinates from a polygon in Shapely

问题描述

如何获取/提取定义shapely多边形的点? 谢谢！

How do you get/extract the points that define a shapely polygon? Thanks!

形状多边形的示例

from shapely.geometry import Polygon

# Create polygon from lists of points
x = [list of x vals]
y = [list of y vals]

polygon = Polygon(x,y)

推荐答案

因此，我发现诀窍是结合使用Polygon类方法来实现.

So, I discovered the trick is to use a combination of the Polygon class methods to achieve this.

如果需要测地坐标，则需要将其转换回WGS84(通过pyproj，matplotlib的basemap等).

If you want geodesic coordinates, you then need to transform these back to WGS84 (via pyproj, matplotlib's basemap, or something).

from shapely.geometry import Polygon

#Create polygon from lists of points
x = [list of x vals]
y = [list of y vals]

some_poly = Polygon(x,y)

# Extract the point values that define the perimeter of the polygon
x, y = some_poly.exterior.coords.xy

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