17871 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. Imaging Notes – Summer 2011 – Observing a Volatile Earth GPS World Magazine – October 2011 – Exelis Introduces Software for Extracting Features from LiDAR Data