ideas for worldbuilding

Hi guys. I don't know if there was such a question or suggestion before, in world building. I just started building a world, quite a complex one, and in the process I realized that it would help a lot if you could mark different routes on the map, for example, air, sea, railway, caravan, or just patrol routes. Which would make the npck a little more lively place, random encounters would be possible. And for example, it would be easier to connect continents and islands with such routes. And there could be height and depth parts on the map. because now, for example, it is quite difficult to create a system of canals or dungeons running under a city, because it flows together with the city. And for example, creating flying islands could also become easier.