bd-offline-geocoder

PyPI Python License: MIT

Offline Bangladesh reverse geocoder for Python.

GPS → Bangladesh address parts: house, road, area/village, union/ward, thana/upazila, district, division, postal code, city.

No API key. No network. Same data as npm and Flutter.

Keywords: Bangladesh reverse geocoder, offline geocoding, upazila, thana, ward, Dhaka street, GIS Python.

from bd_offline_geocoder import BdOfflineGeocoder

geocoder = BdOfflineGeocoder.from_included_data()
result = geocoder.reverse(latitude=23.74015, longitude=90.38286)
print(result.formatted)
# House 3, Road 3, Dhanmondi, Ward No-49, Dhanmondi Thana, Dhaka 1209, Bangladesh
print(result.to_dict())
# {
#   "house_number": "3",
#   "road_number": "3",
#   "road_name": "",
#   "area_village": "Dhanmondi",
#   "union_ward": "Ward No-49",
#   "thana_upazila": "Dhanmondi Thana",
#   "district": "Dhaka",
#   "division": "Dhaka",
#   "postal_code": "1209",
#   "city": "Dhaka"
# }

Install

pip install bd-offline-geocoder

Python 3.9+. Zero runtime dependencies.

from_included_data() parses bundled GeoJSON once and caches the instance. Reuse it in Celery workers, FastAPI lifespan, or Gunicorn preload.

Published wheel is large (~admin polygons + Dhaka streets) because the feature is offline.

Usage

result = geocoder.reverse(latitude=23.74015, longitude=90.38286)
result.house_number   # 3
result.road_number    # 3
result.road_name      # None unless OSM has a named street
result.area_village   # Dhanmondi
result.union_ward     # Ward No-49
result.thana_upazila  # Dhanmondi Thana
result.district       # Dhaka
result.division       # Dhaka
result.postal_code    # 1209
result.city           # Dhaka
result.formatted
result.to_dict()

Outside Bangladesh: found is False and formatted is
This geocoder only supports locations inside Bangladesh.

Invalid / NaN coordinates raise ValueError.

Custom layers

from bd_offline_geocoder import BdOfflineGeocoder, BoundaryLayer, LayerType

layer = BoundaryLayer.from_file(
    "my_localities.geojson",
    id="localities",
    type=LayerType.LOCALITY,
    name_property_candidates=("name", "NAME"),
)
geocoder = BdOfflineGeocoder([layer])

Limits

  • Nationwide: administrative polygons only (ADM4 is simplified).
  • Roads / house numbers: central Dhaka OSM only; house numbers are sparse.
  • Not a Google Maps replacement for every rooftop.

Links
Source https://github.com/TasfiqulGhani/bd-offline-geocoder
Architecture https://github.com/TasfiqulGhani/bd-offline-geocoder/blob/main/docs/ARCHITECTURE.md
Flutter https://pub.dev/packages/bd_offline_geocoder
npm https://www.npmjs.com/package/bd-offline-geocoder

Author: Tasfiqul Ghani. MIT code; see notices for HDX / OSM.

Project links

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Credits

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Author: Tasfiqul Ghani

GitHub Statistics

Data verified by PyPI on Aug 22, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

MIT
View SPDX License List

Requires

Python >=3.9

Provides Extra

publish test

Tags

bangladesh district division geocoding geojson gis offline-geocoder reverse-geocoder union upazila ward

Classifiers

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