@Walter Hinteler,
because LIDAR shoots laser pulses at the rate of thousnds per second, it will shoot between the spaces of trees, slopes in grain fields, and will interpolate around buildings. So it is actually possible, using the "Slopeshade " option, to totally remove all buildings and reinforce any previous rises that have a rectalinear pattern. Coupling LIDAR with a multispectral image (IR,FLIR,UV, UUV, False color, X-ray) can give a whole nother look down. I hope thyve reviewwed the record with this site.
The biggest problems are acquiring the software and hving someone ho gives a **** to play with it.
"Saturation digging" is so last year. Using it you can screw up your site by test pitting when you are using the pits to actually locate what you are interested in.