I have two files (shapefiles). A file with 50x50 meter cells. and a grid with 100 by 100 meter cells. I want to do 'union' so that I know which 4 cells of the 50x50 meter vector layer make up one cell of the 100 by 100 meter layer. However, when I do this, there is for some reason a mistake when doing this. I am expecting 4 different ID values for the 50x50 meter file to 1 ID value for the 100x100 meter grid. However, there is many more. This makes me conclude the layers are not aligned. However,
I use the same projection for both vector layers, so I think that should not be the problem. When I zoom in as far as I can and I change the transparency of the top layer, I still do not see even the slightest mistake in terms of alignment. I have also tried intersect.