Area of Application
Modules and Process Workflow
Zeiss LMK 15
BD Topo project
BD Topo project for creation of a topographic data base on the territory of France was the main production project of Racurs in 2005.
Main technical characteristics:
Input images scale: 1:25000
Camera: F=153.972 mm
Scanning resolution: 28 mkm
Code table including 133 codes
Required accuracy: 1 m (for 3D vectorization)
Racurs has processed LOT 1 and LOT 2. Twenty five blocks with the total area ~ 25000 km2 (or ~ 4.5% of the France’s territory)
Alltogether over 40 operators were trained and engaged in the project.
Specific features of the 3D vectorization:
High accuracy requirements
Necessity to work in 1:3, 1:4 zoom levels
Interpretation complexity: many codes; lack of field survey; specific requirements for topology, etc.
Strict requirements and formalism in quality control
Continuous work with raster map.