text: It's probably the most ugly bit of imported data in all of openstreetmap. I remember during the Nepal earthquake response mapping trying to tidy up a bunch of this over near Kathmandu. As a manual fixup process, one approach seemed to be to find a place where the big polygon naturally divides e.g. a valley bottom with no forest. Make that division in a rough way, just in order to break off a reasonable chunk to work on... and repeat.
   
  Worth noting that the forest coverage visible in imagery may be seasonal (try zooming right out to get a fuzzy view of green areas taken at a different time of year) so in some ways the data is not as hopeless as it might look... but yeah pretty hopeless.
  We should do a coordinated fixup project and link it here: https://wiki.openstreetmap.org/wiki/WikiProject_India#Projects