BExtractor

• "Building Extractor" application is/was 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 Windows machines only (because it was built on MFC).

Program and source code were available as part of the full VTP distribution, but it has fallen into a bit of disrepair over the years.

Online Documentation