byte:       01 - tile
dword:      width
dword:      height
dword:      tile id
dword:      blocking tile?
dword:      image id (in resource)
            .
            .
            .
            -1 ( end of images )

    *** repeat
byte:       02 - map
dword:      tiles per row
dword:      rows
dword:      is isometric
byte....:   map data in bytes

    *** repeat