Bidirectional UTM-WGS84 converter for python
import utm
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
the northern parameter instead, which is a named parameter and can be set
to either True or 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 py.test.
- Tobias Bieniek <[email protected]>
Copyright (C) 2012 Tobias Bieniek <[email protected]>
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