Thanks to Alchemic and Lytron I finally implemented the decompression of the map arrangement data! Both of you definitely deserve a mention in the editor's credits :D
So here you can see the Map of the City of Euro. The tile arrangement seems to fit but the tileset graphics aren't correct yet...
I also decompressed the tileset data but it doesn't make sense to me at the moment.. Maybe they used another compression algorithm for these data sets :(
The decompression of the map metadata[10] data sets sees more promising. I think I found a data table there that I will further investigate.
I will need to implement the compression algorithm for these data sets so I can check back the changes I made to find out the meaning of this data.