Access elevation value of tiles in game

[Impatient]

Hi!

Does a tile in game have an elevation value?
Can the elevation value of a tile be accessed in game and how?

I could not find anything else then the api-doc for the tile properties struct.
https://lua-api.factorio.com/latest/Con ... Properties

But I can not find anything about how to get that struct or an elevation value for a tile in game.