Complete multi-layered geographic databases including:

• Altimetric data
• Digital Terrain Models (DTM) obtained by:
• Existing regional databases (resolution 500 to 50 m)
• SPOT stereopairs (resolution 50 to 20 m)
• Aerial stereophotographs (resolution 20 to 1m)
• Digitizing exiting topographic maps (resolution depends on original map scale)
contour filled DTM          orthophoto+contour lines       blend orthophoto+DTM
 
• Building and vegetation height dataset

Digital raster maps

Scanned and georeferenced topographic or other thematic maps

• Satellite and aerial imagery
• Orthorectified satellite (LANDSAT, SPOT,...) and aerial images
• Land use maps
• Classification of natural and artificial features based on satellite scenes, aerial photographs or existing maps.

 
• Linear features (vectors)
• Roads, Highways, Railways
• Rivers, lakes
• Administrative borders, economic geography, population
• Coastal lines
  
  
• 3D models and stereo views