1

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?

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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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