Maidenhead <-> Lat/Lon

maidenhead provides a simple, yet effective location hashing algorithm. Maidenhead allows global location precision down to 750m

Maidenhead provides 4 levels of increasing accuracy

pip install maidenhead

or for development version

git clone https://github.com/space-physics/maidenhead

pip install -e maidenhead

Examples assume first doing

import maidenhead as mh

Lat, lon to Maidenhead locator:

mh.to_maiden(lat, lon, level)

returns a char (len = lvl*2)

Maidenhead locator to lat lon:

mh.to_location('AB01cd')

takes Maidenhead location string and returns top-left lat, lon of Maidenhead grid square.

The center=True option outputs lat lon of the center of provided maidenhead grid square, instead of the default southwest corner.

Maidenhead locator to geoJSON (RFC 7946)

geo_obj = mh.to_geoJSONObject('AB01cd', center=True, nosquare=False)
geoJSON = json.dumps(geo_obj, indent=2)

Command Line

The command line interface takes either decimal degrees for "latitude longitude" or the Maidenhead locator string:

python -m maidenhead 65.0 -148.0

BP65aa

python -m maidenhead BP65aa12

65.0083 -147.9917

The "python -m" CLI is also available:

python -m maidenhead 65.0 -148.0

The --center option outputs lat lon of the center of provided maidenhead grid square, instead of the default southwest corner.

python -m maidenhead --center --geojson EN35ld

{"type": "FeatureCollection", "features": [{"type": "Feature", "properties": {"QTHLocator_Centerpoint": "EN35ld"}, "geometry": {"type": "Point", "coordinates": [-93.04166666666667, 45.145833333333336]}}, {"type": "Feature", "properties": {"QTHLocator": "EN35ld"}, "geometry": {"type": "Polygon", "coordinates": [[[-93.08333333333333, 45.125], [-93.08333333333333, 45.166666666666664], [-93.0, 45.166666666666664], [-93.0, 45.125], [-93.08333333333333, 45.125]]]}}]}

The --center option enables adding center point of the grid square as Point feature.

The --nosquare option disables adding Polygon feature for the requested grid square

Alternatives

Open Location Codes a.k.a Plus Codes are in Python code by Google.

Web convertor Earth Point - Tools for Google Earth.