Shapely Python – Is It Possible to Do an Affine Operation on Shape Polygon?

Question

I am trying to create a rotated rectangle in lat/lon coordinates.

Basically, I have the coordinates of the center and rotation angle around the center.

Is it possible to do using, shapely or gdal, or something else?

Answer 1

Shapely's affinity module supports affine transformations on any geometry, for example:

from shapely import affinity
from shapely.geometry import LineString

# Example geometry
line = LineString([(1, 3), (1, 1), (4, 1)])

# Rotate 30 degrees CCW from origin at the center of bbox
line_rot_center = affinity.rotate(line, 30, 'center')

# Rotate from origin at (1, 1)
line_rot_11 = affinity.rotate(line, 30, (1, 1))