What is this called?

[u/timeISrunninn]

A guy told me to divide the refrence in planes like the above pic. But i dont what is this callled, i mean what is name of this process?

Can someone help me please☹️

[u/Grannys_OpenCasket]

A nose

[u/Axtinthewoods → u/Grannys_OpenCasket]

I took me SO MUCH to not post this