In ISO 15926-3 in subclause 5.3 the following schema for 'coordinate system' is shown:
Coordinate system to ISO 15926-3
Although I admit that I am not an expert in geometry, I had a hunch that this could not be correct. Below are my two cents of wisdom on this:
Coordinate system to ISO 15926-2
Either the one or the other must be incorrect. Don't shoot the messenger!
Please see also here...
The following three templates apply:
Defining a coordinate system
Position of class members in a coordinate system
Position of a temporal part in a coordinate system