I have drawn a base tileset of background tiles, at 64 x 64, and created a tilemap at that size. It's working ok, but I also have some 128 x 128, 128 x 256, 256 x 128, 256 x 256, and a couple of 512 x 512, to represent bigger buildings, compounds etc ... that I will want on the map as well. All the various sizes will be on the same game-map, and it will be scrollable as a city map
Example of work in progress below ...

Do I have to create a seperate tilemap and tileset for each tile size ?
If so do I have to create seperate scroll scripts for each tilemap or will the one suffice for all while playing ?
Thanks in advance for any advice, answers..