The standard square grid has two axis: x and y, how would a grid made from tesselating equilateral triangles work? (An isometric grid) Triangles don't have 2 sets of parrallel sides, like squares so as far as I can tell 3 axis are needed: Isometric Axis
But then there is no easy way of interpreting it as each axis must have its respective grid lines coming of it from either a 30' angle or a 60' angle. And you have the problem where not all coordinate combinations can actually lie on the grid, eg. (x:1, y:2, z:3).
Is there some pre-existing method/standard of plotting "isometric coordinates" or is there no other way?
Ps. Sorry if the tags are wrong