Thread:Extension talk:Maps/Custom Coordinate systems?/reply (3)

That really depends on what you exactly want to be able to do, and with which mapping service. The easiest approach would be to just work with a single image. Only if you have a really huge space, like in a game world, you'd need to have server side tile rendering. Working with just one image won't take very long to implement, like I sated before, it should not take more then a few days. Multiply that by €50/h and you have my estimate.