VisionMap A3 Digital Mapping System
| Overview | |
|---|---|
| Type | Airborn Digital Camera |
| Sensor/medium | |
| Sensor type | Dual CCD |
| Maximum resolution | 4006 x 2666 / 7812 x 2666 (dual) |
| Recording medium | Flash Drive 500GB |
| Shutter | |
| Frame rate | 7 fps |
| General | |
| Dimensions | 70 x 70 x 30 cm |
| Weight | 30Kg |
A3 Camera System is an automatic aerial mapping system that consists of an airborn camera and a ground processing system[1] produced by Vision Map. The airborn part of the system consists of a dual CCD camera, a Jpeg2000 compression and storage unit and a GPS unit. The captured data is post-processed in the ground system in order to create the final large image.
Camera Operation
The typical workflow consist of flight planning, aerial survey and a data post-processing, which includes multiple geometric transformations in order to produce the result orthophoto.
The camera consists of a frame, two lenses mounted on the special motor controlled axis that is attached to the frame. This construction allows the camera to operate in a sweeping mode in the cross-track direction. Such a mode provides a very wide 104 degrees FOV an improvement compared to the single lens which provides relatively small 6.9x4.9 degrees FOV.
The captured frames are compressed using hardware Jpeg2000 lossless compression unit allowing high data throughput. These frames along with the metadata recorded during the flight are processed on the ground after the flight.
The processing includes various techniques like aerial triangulation, image registration. The process can optionally produce the digital terrain model along with the final large image.
Major features
- Fully automatic processing with no ground control needed.
- digital terrain and surface models generation
- Large 104 Degrees field of view
- 300mm focal length allowing operation at high altitudes