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Wrapper around rasterio to query points on a Digital Elevation Model

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Wrapper around rasterio to query points on a Digital Elevation Model.


  • Use multiple raster files without having to merge them into a new file
  • Query many points at once
  • Optional 2D interpolation (linear, cubic, or quintic)
  • Reasonably performant by reading the minimal data required from raster


I recommend first installing dependencies with Conda, then installing demquery itself with pip.

conda install gdal rasterio numpy scipy -c conda-forge
pip install demquery


from demquery import Query

dem_paths = ['dem1.tif', 'dem2.tif']
query = Query(dem_paths)

# Points must be in longitude, latitude order!
# These points are in Manhattan, not Antarctica
points = [(-73.985564, 40.757965), (-73.968520, 40.778912)]
elevations = query.query_points(points, interp_kind='linear')

Data Download

For a great visual tool to download worldwide SRTM data, check out these sites:


[0.2.1] - 2019-12-04

  • Include requirements.txt and requirements_dev.txt in manifest bundle

[0.2.0] - 2019-12-02

  • Fix virtual raster issues.

[0.1.0] - 2019-11-27

  • Initial release on PyPI

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