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Generate minimalist desktop wallpapers from topographic contour lines (isohypses) and hillshaded relief.
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README.md

Isohypses Wallpaper

Generate minimalist desktop wallpapers from topographic contour lines (isohypses) and hillshaded relief.

The tool fetches SRTM elevation data for a user-defined geographic area and produces a high-resolution image suitable for desktop backgrounds, with customizable colors and contour spacing.

Features

  • Generate wallpapers from real-world terrain
  • Hillshade relief on a uniform background color
  • Optional contour (isohypse) lines
  • Configurable via command line
  • Uses free SRTM elevation data
  • Suitable for widescreen and high-resolution displays

Example Output

  • Uniform background color
  • Subtle hillshade for depth
  • Clean contour lines for structure

alt text

How it works

  1. Converts zoom level and latitude to meters-per-pixel using Web Mercator rules
  2. Computes a geographic bounding box matching the requested screen size
  3. Downloads and clips SRTM elevation data
  4. Resamples DEM to match output resolution
  5. Computes hillshade
  6. Applies hillshade to a uniform background color
  7. Saves the final image

Documentation

Data Sources

  • Elevation data: NASA SRTM (~30m spatial resolution) via elevation library

License

GNU General Public License (see LICENSE file).

Acknowledgements

  • NASA / USGS for SRTM data
  • GDAL and rasterio projects
  • matplotlib and scipy communities