[Convert a shapely Polygon to GeoJson using GeoPandas] from: https://stackoverflow.com/questions/51486454/convert-geopandas-shapely-polygon-to-geojson #python #datascience #gis

shapely_to_geojson.py

In [1]: from shapely.geometry import Point
In [2]: import geopandas as gpd

In [3]: shapely_polygon = Polygon([(0, 0), (0, 1), (1, 0)])

In [4]: gpd.GeoSeries([shapely_polygon]).__geo_interface__
Out[4]: 
{'bbox': (0.0, 0.0, 1.0, 1.0),
 'features': [{'bbox': (0.0, 0.0, 1.0, 1.0),
   'geometry': {'coordinates': (((0.0, 0.0),
      (0.0, 1.0),
      (1.0, 0.0),
      (0.0, 0.0)),),
    'type': 'Polygon'},
   'id': '0',
   'properties': {},
   'type': 'Feature'}],
 'type': 'FeatureCollection'}

import shapely
import json

shapely_polygon = shapely.geometry.Polygon([(0, 0), (0, 1), (1, 0)])
print(
    json.dumps(
        shapely.geometry.mapping(shapely_polygon),
        indent=4
    )
)

Output

{
    "type": "Polygon",
    "coordinates": [
        [
            [
                0.0,
                0.0
            ],
            [
                0.0,
                1.0
            ],
            [
                1.0,
                0.0
            ],
            [
                0.0,
                0.0
            ]
        ]
    ]
}

Excelent! Thanks a lot!