I have been to the Netherlands and mapped some runs and walks. I was impressed by the import of the AND/3dshapes there and hope that I have not interfered with automatic repairs. The GPX tracks are uploaded, so that other might check and
Some of the data seems to be for rendering only - most rivers are split, when they flow under a bridge. In some areas the streets run through the houses, but it was not possible to detect whether the importet house shapes are correct or the streets...