I tried a few things concerning the zoom-levels. I thought the zoom-levels of Map Image API (1-12), could be translated to the regular zoom-levels which are used for Yahoo Maps tiles (for example zoom-level 1 of the Map Image API would be zoom-level 17). But actually the Map Image API uses completely different zoom-level steps!
What I want to do, is to calculate the bounds/extent of the map image I fetched.
This formulas (http://tech.groups.yahoo.com/group/yws-maps/message/1037)
seem to be not valid any more (http://tech.groups.yahoo.com/group/yws-maps/message/5481)
The description of the REST API says: "Fetch a map image programmatically and stitch tiles together to build your own map."
That is exactly what I want to do, but therefor I will have to know, the bounds of the map images.
Does anybody have an idea how to do this?