Some information on how to map specific objects are on the wiki page at http://wiki.openstreetmap.org/wiki/Map_Features . If you have something that is disused, the osm preference for that is the `disused` prefix. So, if you have a disused colliery tip, you could tag it `disused:landuse=colliery_tip`. Another good way to see how to tag a specific thing is to look at others in the are and see how they are tagged. tagged. And taginfo, as mentioned. A prominent german colliery tip is tagged simply as `landuse=landfill`. I would think that is bad, though, because then there is no distinction between a waste dump landfill and a coal dump tip. So, to sum it up: disused:landuse=colliery_tip disused:landuse=spoil_heap landuse=forest/grass/heath/...

Some information on how to map specific objects are on the wiki page at http://wiki.openstreetmap.org/wiki/Map_Features . If you have something that is disused, the osm preference for that is the `disused` prefix. So, if you have a disused colliery tip, you could tag it `disused:landuse=colliery_tip`. Another good way to see how to tag a specific thing is to look at others in the are and see how they are tagged. A prominent german colliery tip is tagged simply as `landuse=landfill`. I would think that is bad, though, because then there is no distinction between a waste dump landfill and a coal dump tip. So, to sum it up: disused:landuse=colliery_tip landuse=forest/grass/heath/...