This is something very Important to all my Mapping friends, When you edit in Potlatch use maximum zoom to make roads and buildings, because half of the time is spent in clearing all unwanted data and correcting the errors made by fellow mappers,
Yes the Woodland problem is everywhere in India, One mapper has mapped everything what was looking green on landsat aerials as Landuse=wood. I delete this normaly. The same problem are also inacurate rivers, canals and drains.
Normaly is the landuse=wood tag totaly wrong, thats means there is nothing that can be renamed. The areas are so huge that they can cover citys like Mumbay or Delhi in it. Also you will find more then 1000 villages 10000 farms inside one area. Of cause, I rename it, if it makes sense. But mostly I draw a new ouline around the right small areas. This is much faster and more accurate.