how to cut a big raster gis

[Leopold Schefcik (MULTIMEDIAPLAN.AT)]

hi list, a general question:

How can I cut a big raster gis (satellite picture) to many small ones with
different quality for different zoom factors?

Leopold

e.g.
zoom factor: 1 -> 1 file
zoom factor: 10 -> 4 files
zoom factor: 100 -> 16 files
zoom factor: 1000 -> 64 files
zoom factor: 10000 -> 256 files
zoom factor: 100000 -> 1024 files
....
all files shoult have the same size.