I have one shape-file with a lot of features (polygons) and if I try to merge these into one big polygon in QGIS it takes days to complete the merge. So I wonder if there is another way? I saw this question:
The problem is that I don't know python and I have no idea of what they are talking about... So, could someone either give me some advice to perhaps do this operation from command line (I'm using Mac) or maybe if someone has a ready python script that does the trick?