https://osm2cdr.com/formats/hgt/
Convert OpenStreetMap to SRTM HGT Elevation Tile | OSM2CDR
Download professional SRTM HGT raster maps from OpenStreetMap data. Getting a correctly structured HGT tile with a proper SRTM-convention name for tools...
to srtm hgtelevation tileconvertopenstreetmap