I am new to QGIS and I am trying to import more than 700 xyz (it is the same as ASCII?) files into the map so I can get a digital elevation model and then get the average elevation for some small polygons. I can simply import individual xyz file but importing more at once doesn't work for me?
I would like to make something such as a virtual raster catalog but I get:
Warning 6: gdalbuildvrt does not support positive NS resolution.
My files look like this: (they have no headers)
383000.0 97000.0 83.30 383005.0 97000.0 82.80 383010.0 97000.0 82.70...