AV-G20
Hillshade & Colour Relief
Render shaded relief and colour-by-height images from .hgt or GeoTIFF DEMs.
● Runs on your device; nothing is uploadedHow to use it
- Drop a .hgt, .hgt.zip or single-band GeoTIFF DEM.
- Pick Hillshade, Colour or Both.
- Set the sun azimuth, altitude and vertical exaggeration.
- Choose a Colour ramp and whether heights at or below 0 m show as water.
- Click Download PNG for a full-resolution image.
Limits
- File size
- 150 MB
- Raster cells
- 25 million (larger rasters are resampled)
- Preview
- 1,024 px on the longest side
- Sun azimuth
- 0–359°
- Sun altitude
- 1–90°
Features
- Horn's slope method, as used by GDAL
- Five colour ramps: Terrain, Hypsometric tints, Viridis, Magma, Greyscale
- Blend mode with adjustable shade strength
- Lon/lat grids converted to metres at the centre latitude
- Manual cell size when the file has none
- Rendering runs in a Web Worker
For AI agents: avtools_hillshade
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