PYTHON

geopandas set crs

my_geoseries = my_geoseries.set_crs("EPSG:4326")
my_geoseries = my_geoseries.set_crs(epsg=4326)

geopandas set CRS

# To set a CRS
gdf = gdf.set_crs('EPSG:4326')
# To transform and reprojet geometry into another CRS
gdf = gdf.to_crs('epsg:3857')
>>> gdf.crs  
<Projected CRS: EPSG:3857>
Name: WGS 84 / Pseudo-Mercator
Axis Info [cartesian]:
- X[east]: Easting (metre)
- Y[north]: Northing (metre)
Area of Use:
- name: World - 85°S to 85°N
- bounds: (-180.0, -85.06, 180.0, 85.06)
Coordinate Operation:
- name: Popular Visualisation Pseudo-Mercator
- method: Popular Visualisation Pseudo Mercator
Datum: World Geodetic System 1984
- Ellipsoid: WGS 84
- Prime Meridian: Greenwich