BExtractor

• "Building Extractor" application, part of the VTP software
• reads USGS DRG (scanned topographic maps)
• identifies the location of individual buildings, by looking for the small black squares
• also allows manual identification, manual extraction of larger building footprints, and touchup
• writes .VTST (Structure Files), which can be loaded by VTBuilder, Enviro, and the VTP libraries

• If the buildings in your DRG look like this, their locations can be automatically extracted:

• If not, BExtractor can still be used to manually digitize the building locations and footprints.

Runs on Win32 machines.  Due to the large size of DRG files, at least 128MB RAM is recommended.

Program and source code is available as part of the full VTP distribution, available on request.

Online Documentation