Oblique images, 3D city model and True-Orthophoto
Oblique images with an average resolution of 8cm are captured for the urban areas using COWI's oblique aerial image system. Besides the four oblique cameras, this system also contains a high-resolution Nadir camera that acquires stereo images (55/75 overlap). The oblique images are used to automatically texture the detailed 3D model that is semi-automatically derived from the Vexcel stereo images using COWI’s powerful and in-house developed software tools based on MicroStation.
The 3D vector model is also used for the generation of a True-Orthophoto of the urban areas.Joint Venture with Space Imaging Middle East
The Qatar National Aerial Mapping 2008 project is a joint project between COWI Mapping & Geodata and Space Imaging Middle East (SIME). COWI is responsible for the aerial data acquisition, measurement of Ground Control Points and the 3D city model.
SIME is producing the AT, DTM Orthophoto and the vector map update.