I am new to QGIS and trying to import two thousand geo pngs to create a raster map. each png is indexed 2-4 colours.
I have tried several things:
- importing one by one works, as does to drag-and-drop all of them at once, but i have to confirm the CRS for every file which is not practical. is there a way to say 'yes to all' ?
- i've created a VRT, but when that is imported, the files all render black, except the first one that renders red. i've tried playing around with the vrt styles, but it seems that is meant to use the colors from only first 1-3 bands, and in my VRT every file is a separate band?
- I also have separate layers as b&w geo-tiffs, that were used to create the coloured pngs. however importing them has exactly the same issues as A+B above, either I have to manually create each one, or the map ends up black.
I guess i don't understand something basic about raster rendering in gdal.