python - 从 Shapely 中的多边形中提取点/坐标

Question

如何获取/提取定义 shapely 多边形的点？谢谢!

形状多边形示例

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)

Answer 1

诀窍是使用 Polygon 类方法的组合:

from shapely.geometry import Polygon

# Create polygon from lists of points
x = [0.0, 0.0, 1.0, 1.0, 0.0]
y = [0.0, 1.0, 1.0, 0.0, 0.0]

poly = Polygon(zip(x,y))

# Extract the point values that define the perimeter of the polygon
xx, yy = poly.exterior.coords.xy

# Note above return values are of type `array.array` 
assert x == xx.tolist()
assert y == yy.tolist()