Scaling linestrings gives incorrected final scale

Question

I have a shapefile with about 5000 line strings. I am translating and scaling this file using GeoPandas:

import geopandas

green = geopandas.read_file('./shapefiles/unnamed (1)_green.shp')

The translation process completes with no problem but the scaling projects wrong coordinates.

Translating:

green['geometry'].translate(510959.95011, 3935297.77119)

Scaling:

green['geometry'] = green['geometry'].scale(2,2,2)

Is there a workaround?

Answer 1

If you don't use origin parameter, a geometry is scaled from its bounding box center. Therefore, use an appropriate center coordinate for origin.

For example:

green['geometry'].scale(2, 2, origin=(510959.95011, 3935297.77119))