Bidirectional UTM-WGS84 converter for python
Convert a (latitude, longitude) tuple into an UTM coordinate:
utm.from_latlon(51.2, 7.5) >>> (395201.3103811303, 5673135.241182375, 32, 'U')
The syntax is utm.from_latlon(LATITUDE, LONGITUDE).
The return has the form (EASTING, NORTHING, ZONE NUMBER, ZONE LETTER).
Convert an UTM coordinate into a (latitude, longitude) tuple:
utm.to_latlon(340000, 5710000, 32, 'U') >>> (51.51852098408468, 6.693872395145327)
The syntax is utm.to_latlon(EASTING, NORTHING, ZONE NUMBER, ZONE LETTER).
The return has the form (LATITUDE, LONGITUDE).
Since the zone letter is not strictly needed for the conversion you may also
northern parameter instead, which is a named parameter and can be set
False. Have a look at the unit tests to see how it
can be used.
The UTM coordinate system is explained on this Wikipedia page.
The library has been compared to the more generic pyproj library by running the unit test suite through pyproj instead of utm. These are the results:
- with pyproj (without projection cache): 4.0 - 4.5 sec
- with pyproj (with projection cache): 0.9 - 1.0 sec
- with utm: 0.4 - 0.5 sec
Create a new
virtualenv and install the library via
pip install -e ..
After that install the
pytest package via
pip install pytest and run
the unit test suite by calling
see CHANGELOG.rst file
Copyright (C) 2012 Tobias Bieniek <Tobias.Bieniek@gmx.de>
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