[Help Request] WMO Minimaps

[xalcon]

Hello there,
currently I'm working on my pather and to help orientating on those path-files, I draw the minimap behind those pathes. For adt-based minimap tiles this is working realy well (since it is quite easy), but I have a problem with the WMO "minimaps". How do I know where do I have to draw those minimap tiles?

For example: Ragefire chasm has 19 minimap tiles. Those tiles have a dynamic size between 64x64 to 256x256 pixels and the tiles are NOT drawn on a gridlike pattern. It seems they have a fixed position relative to a parent tile or something. Here is an example how those 19 tiles are "puzzled" to the full minimap:

The Minimap files for ragefire are located in [WoW Virtual File System]\World\wmo\Dungeon\KL_OgrimmarLavaDungeon

Is there a DBC File for those positions or something?

Thanks in advance,
Xalcon