Typical Directory Structure for Developers using the VTP Software (Source)

• VTP
  • TerrainApps -- Contains the VTP applications
    • Enviro -- The VTP runtime environment application
    • BExtractor -- A tool that reads USGS Digital Raster Graphic files and extracts coordinates of buildings
    • VTBuilder -- A GIS tool which imports/merges/sub-samples/edit all types of geospatial data
    • CManager -- A content manager application (very preliminary, for advanced users only)
    • wxSimple -- A very simple example of using vtlib with wxWindows
    • glutSimple -- A very simple example of using vtlib with GLUT
    • mfcSimple -- A very simple example of using vtlib with MFC
    • sdlSimple -- A very simple example of using vtlib with SDL
    • wxSimple -- A very simple example of using vtlib with wxWindows
    • Data - Cultural and geospatial data used by the software goes here
  • TerrainSDK -- Contains the VTP libraries
    • vtdata -- a library for handling common terrain-data types and formats
    • vtlib -- a library for displaying the terrain data as a 3D world
    • xmlhelper -- a library for reading XML files

• APIs -- Contains third-party libraries, which may include directories such as:
  • gdalxxx -- GDAL library includes OGR for projections and a great many file formats
  • libpng-x.x.x -- support for PNG files
  • netcdf-x.x.x.win32bin -- support for NetCDF files, commonly used for bathymetry
  • osg-x.x.x-bin -- 3D scene graph library
  • wxx.x.x - wxWindows, a portable GUI library