17535 Esri.com – September 2011 – Using Automatic 3D Building Extraction to Enhance Your GIS Esri.com – September 2011 – Using Automatic 3D Building Extraction to Enhance Your GIS Beau Legeer of Exelis introduces the technology concept of 3D building extraction from LiDAR data. PC transform on HDF file with spectral subset incorrectly uses all bands Using IDL 8 Graphics (a.k.a. New Graphics)