How to calculate the center of gravity with shapely in python?

python shapely
Vianney Bailleux picture Vianney Bailleux · Nov 27, 2018 · Viewed 8.5k times · Source

I discovered shapely but I did not find how to calculated the center of gravity of a polygon!

Does someone have the solution?

Answer

ewcz picture ewcz · Nov 29, 2018

If your polygon has a uniform density, its center of mass coincides with its centroid. In shapely, the centroid can be directly calculated as:

from shapely.geometry import Polygon

P = Polygon([[0, 0], [1, 0], [1, 1], [0, 1]])

print(P.centroid)
#POINT (0.5 0.5)

Related questions

Extract points/coordinates from a polygon in Shapely

How do you get/extract the points that define a shapely polygon? Thanks! Example of a shapely polygon from shapely.geometry import Polygon # Create polygon from lists of points x = [list of x vals] y = [list of y vals] polygon = …

Read More
How to create a shapely Polygon from a list of shapely Points?

I want to create a polygon from shapely points. from shapely import geometry p1 = geometry.Point(0,0) p2 = geometry.Point(1,0) p3 = geometry.Point(1,1) p4 = geometry.Point(0,1) pointList = [p1, p2, p3, p4, p1] poly = geometry.Polygon(pointList) gives me an type error …

Read More
Faster way of polygon intersection with shapely

I have a large number of polygons (~100000) and try to find a smart way of calculating their intersecting area with a regular grid cells. Currently, I am creating the polygons and the grid cells using shapely (based on their corner …

Read More