When creating a new land use layer in shape file format, based on an existing buildings layer, that layer gets transformed as well and removed from the legend (so the user does not even realise the original data was changed).
The same does not happen when creating a new land use layer as a memory layer.
When creating a new land use layer in shape file format, based on an existing buildings layer, that layer gets transformed as well and removed from the legend (so the user does not even realise the original data was changed). The same does not happen when creating a new land use layer as a memory layer.