I have a dataset of over 400 .tif-files, which I'm supposed to merge in QGIS into a single layer, representing a base map. These .tif files are pieces of a topography map (scale of 1 to 50000), and the file sizes are between 2 MB and 83 MB.
I'm relatively new to QGIS, and I have no idea what would be the smartest way to handle this (if there is any). Is it possible to create anything similar to ArcMap mosaic datasets in QGIS? I was specifically requested to find a way to do this in QGIS.
My research on the topic suggested that I could try to 1. build pyramids and then build a virtual raster or 2. use the merge function. Well, building pyramids for 400+ files seems painfully slow and manual.
Building a virtual raster without pyramids only gave me the error: "The process failed to start. Either the invoked program is missing, or you may have insufficient permissions to invoke the program". I have a write permission to the disk with the input and output locations, so that shouldn't be the problem.
Merge-function apparently only works for a few rasters at a time, not 400 of them.