Gridding Tree canopy data
I have tree canopy data in shp polygon format. I want to grid it so that I can convert to a clutter dataset in ascii grid. The tree canopy has no height value so I would like to globally assign a 1m elevation to all polygons and then grid based on this. What tool in GM would i use to add a global attribute like this to the DBF file and then I assume I can use the normal gridding tools.