When working with GeoDataFrames, the coordinate reference system (CRS) is stored as a pyproj.CRS object: geopandas.GeoDataFrame.crs. So in swmmio, I expected to get the same behavior when calling model.crs and model.links.geodataframe.crs. However, I realized that the first returns a str and the second returns pyproj.CRS.

Example:

from swmmio.examples import philly
import copy

model = copy.deepcopy(philly)

print(f'Data type of model.crs: {type(model.crs)}')
print(f'Data type of model.links.geodataframe.crs: {type(model.links.geodataframe.crs)}')

Output:

Data type of model.crs: <class 'str'>
Data type of model.links.geodataframe.crs: <class 'pyproj.crs.crs.CRS'>

I could see a benefit to aligning model.crs with the GeoPandas convention. Thoughts?