Convert existing custom map to a tiled map for use with Carla 0.9.12 without Roadrunner

[patmalcolm91]

I currently have fairly large map that was created without Roadrunner. Since the performance of Carla with this map is relatively low, I would like to convert it to a tiled map to take advantage of the new "Large Map" feature in Carla 0.9.12. However, I can't find any specific information on how to go about this in the documentation.

From looking at the Town11 example, it seems that the lighting and other global objects in the world should be placed in the main umap file, and that each tile should be contained within its own umap file without any lighting or such objects. What is not so clear, however, is how Carla knows the bounds of each tile (and thus which one(s) to load). Is this indicated by some object(s) in the OpenDrive file, or via some other means?

Any help you can provide would be greatly appreciated!