From [How to create a 3D shapefile from a raster?] For the moment, the geometry system of QGIS does not handle z-values but z-coordinates can be read by parsing the binary format of the geometry (see ...

This solution is needed mainly because mobile apps have a serious problem with large .shp files (although mobile app developers have the ability to change this ...

When OTF is on and the loaded shapefile is not in the same CRS as the project/default, it is located at the wrong place. I have this problem when I want to import a shapefile (in a projected CRS) into ...