I have got some GPS tracks (MultiLineString). As I import them to QGIS, they look like this:
I would like to merge them and to do so, I have to rename all of them like this (picture 2) otherwise an error occurs (all tracks become one single track at the same position).
I usually give numbers as names (e.g. 01-200). Sometimes I have only a few tracks but sometimes a lot.
Is it possible to rename all the tracks (layers) without renaming them one-by-one by hand?