General
The Image Server is a CGI-script that provides pictures in various dimensions. 
Features
- request with arbitrary bounding box
 
- original picture ratio is maintained
 
- delivering and caching of pictures in dimensions of a certain raster.
 
- picture fits into bounding box (no dimension will be larger, but can be smaller)
 
- picture is just scaled down
 
- allow browser side caching, even for different bounding boxes (using redirection)
 
- support extern storage of scaled pictures to allow mirroring. (redirection map)