SRTM.py

SRTM.py is a python parser for the Shuttle Radar Topography Mission elevation data.

See: http://www2.jpl.nasa.gov/srtm/.

Usage:

import srtm
elevation_data = srtm.get_data()
print 'CGN Airport elevation (meters):', elevation_data.get_elevation(50.8682, 7.1377)

With get_elevation() an elevation of the the nearest location found in the SRTM data will be given. If you need an approximation based on nearby locations, you can use:

elevation_data.get_elevation(50.8682, 7.1377, approximate=True)

You can create elevation images with:

import srtm
geo_elevation_data = srtm.get_data()
image = geo_elevation_data.get_image((500, 500), (45, 46), (13, 14), 300)
# the image s a standard PIL object, you can save or show it:
image.show()

On every elevation requested the library will:

• Check if the SRTM file is stored locally
• If not -- download it from NASA servers
• Parse elevations from it

That's why the first run of your application will always take a few seconds.

Example images

Istra and Trieste:

Rio de Janeiro:

Miami and florida:

Sidney:

gpxelevations

gpxelevations is a utility commandline tool to add/update elevations in a GPS track file:

$ gpxelevations -h
usage: gpxelevations [-h] [-o] [-p] [-s] [-c] [-f FILE] [-v]
                     [gpx_files [gpx_files ...]]

Adds elevation to GPX files

positional arguments:
  gpx_files             GPX files

optional arguments:
  -h, --help            show this help message and exit
  -o, --overwrite       Overwrite existing elevations (otherwise will add
                        elevations only where not yet present)
  -p, --approximate     Approximate elevations with neighbour point elevations
  -s, --smooth          Smooth elevations
  -c, --calculate       Calculate elevations (but don't change the GPX file
  -f FILE, --file FILE  Output filename
  -v, --verbose         Verbose output

License

GPX.py is licensed under the Apache License, Version 2.0