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Brief overview and tutorial for QT Modeler's point cloud Classification & building extraction tool. This is an easy and powerful tool which can: - Automatically classify point clouds - Automatically identify and extract building footprints, roof outlines, and centroids. - Create a Digital Terrain Model (DTM , aka "bare earth) - Create a Digital Surface Model (DSM) - Edit and clean up results manually with easy, specialized tools. - Export a wide variety of products to different platforms.