hub/crs_conversion.py

import geopandas as gpd
from shapely.geometry import Polygon, MultiPolygon
from shapely.geometry.polygon import orient

input_file = 'data/selected_buildings.geojson'

output_file = 'data/selected_buildings_corrected.geojson'

gdf = gpd.read_file(input_file)

if gdf.crs is None:
    gdf.set_crs(epsg=3857, inplace=True)

gdf = gdf.to_crs(epsg=4326)

def reorient_geometry(geom):
    if geom.is_empty:
        return geom
    elif geom.geom_type == 'Polygon':
        return orient(geom, sign=1.0)
    elif geom.geom_type == 'MultiPolygon':
        reoriented_polygons = [orient(polygon, sign=1.0) for polygon in geom.geoms]
        return MultiPolygon(reoriented_polygons)
    else:
        return geom

gdf['geometry'] = gdf['geometry'].apply(reorient_geometry)

gdf.to_file(output_file, driver='GeoJSON')