Python: find area of polygon from xyz coordinates

Question

I\'m trying to use the shapely.geometry.Polygon module to find the area of polygons but it performs all calculations on the xy plane. This is fine

Answer 1

The area of a 2D polygon can be calculated using Numpy as a one-liner...

poly_Area(vertices) = np.sum( [0.5, -0.5] * vertices * np.roll( np.roll(vertices, 1, axis=0), 1, axis=1) )