VTP Implementation - Libraries

• VTP Terrain Library (vtlib)
  • a set of C++ classes for 3D terrain and culture generation
• VTP Data Library (vtdata)
  • a set of C++ classes for handling raw geospatial data
  • reads, or encapsulates support for reading common terrain-data formats, including DEM, DTED, LULC, DLG, Shapefiles, and BMP
  • reads and writes native VTP formats (BT, VTST, RMF, etc.)
  • manages geographical coordinates and projections by extending OGR/PROJ.4

Dependencies: Third-party Libraries Currently Used by the VTP software

"If I have seen further than others, it is because I have stood on the shoulders of giants..."

Library	License	About
wxWidgets	LGPL-style	Portable GUI library, free for every platform.  Some porting issues, see Porting wxWindows Icons.  The library size can be reduced by turning off features we don't need: see Shrinking wxWindows on Win32.
GDAL / OGR	MIT/X	GDAL for raster formats, OGR for vector formats.
PROJ.4	MIT	Cartographic Projections Library, like GCTPC, but newer and cleaner
Shapelib	LGPL or MIT-style	Read/write ArcView Shapefiles (bundled into GDAL)
libgeotiff	'X style license'	Read/write GeoTIFF files (bundled into GDAL)
libpng/zlib	custom	Read/write PNG files and Gzip-compressed files.
libcurl	MIT/X	Client-side URL transfer library, supporting FTP, HTTP, and related protocols.
libMini	LGPL	CLOD library by Stefan Röttger, also does paging of large elevation/texture data via tilesets.
NetCDF	custom	Reads the CDF format
OpenSceneGraph (OSG)	custom	Portable 3D scene-graph library.  Besides basic scene graph functionality, it also provides the VTP with an art path, via .3DS and other 3D model formats.
QuikGrid	LGPL	By John Coulthard.  Reads a set of scattered data points, generates a grid, then display the surface as a contour map.
OpenGL		3D rendering, both directly and indirectly through the scene-graph library.

Alternatives to OSG:

• OpenSG (LGPL)
• SGL - another Scene Graph Library

Other Potential Libraries