Geometry is in a geographic CRS. Results from 'buffer' are likely incorrect. Use 'GeoSeries.to_crs()' to re-project geometries to a projected CRS before this operation code example

Example 1: geopandas set crs

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

Example 2: assigning crs using python pyproj

import pyproj 
crs = pyproj.CRS("EPSG:32643")
print(crs.is_projected)