Websites such as this one: https://gisgeography.com/best-free-gis-data-sources-raster-vector/ have many references to elevation data. They are all in *.jpg or other image format, however. What I need is simply a flat text file with lat/long/elevation as real numbers. I suppose there is a way to find or extract such data. Any pointers?


My common tool to convert raster data to XYZ is in GRASS GIS r.out.xyz

QGIS processing (at least v2.18) offers GDAL module gdal2xyz

But be aware, larger DEM files can produce a really large TEXT files.

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