Why no map grid mods?

[VulcanTourist]

It amazes me that no one has thought to make a mod that overlays a polar coordinate grid over the map, with some nomenclature strategy - like letters for latitude and numbers for longitude - for identifying and locating each grid element. The value of it should be obvious: it would provide a very handy means of naming and locating portals placed around the map. I'm struggling right now with how to name and re-locate my portals later, since no land masses in the game are even named, much less something more predictable.