AV-G17
HGT → EXR
Convert SRTM .hgt elevation tiles (or .hgt.zip) into 32-bit float OpenEXR heightmaps.
● Runs on your device; nothing is uploadedHow to use it
- Drop a .hgt or .hgt.zip tile
- Choose how Voids (-32768) are handled
- Pick Values, Channels and Compression
- Check the preview and stats, then click Download EXR
Limits
- Input file size
- 60 MB
- Input formats
- .hgt, or .zip containing a .hgt
- Grid
- Square 16-bit grid (SRTM1 3601², SRTM3 1201²)
- Preview
- Longest side 512 px
Features
- 32-bit float OpenEXR output, ZIP (lossless) or uncompressed
- Voids filled from neighbours, kept as NaN, set to tile minimum or 0
- Raw heights in metres or normalised 0–1
- Single Y channel or RGB for wider compatibility
- Tile bounds read from SRTM file names such as N27E086
- Converts in a Web Worker; grayscale preview shows voids in red
For AI agents: avtools_hgt_to_exr
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