I am working on a tree crown delimitation project with lidar data. Everything is going well but at some point, it just seems I can't use the query builder in the con tool. I've used it in steps before this point so I don't know where the trouble might be....
Here are the steps thus far:
invert canopy raster (Math/Negate tool)
- tree peaks become ponds
- branches/crowns become watersheds
Smooth inverted raster (Filter)
Determine local minima
- focal flow to extract tree tops (Con tool, VALUE = “255”, if true, return Inverted raster
Remove lowest trees (< 7 meters) --> here comme the trouble, trying to use the con tool, I don't have access to the data in the Query Builder of the con tool!!
Any help would be appreciated!