I'm building software and want to use good terminology for variables, tables, etc.
Most of my work involves blueprint drawings on which I render shapes (pins, polygons, etc). The same set of pins can be represented on different blueprints which has different "projections". The main blueprint is my "base projection".
A section blueprint of a beam will be rotated along x or y so it has a completely different coordinate system.
Another section blueprint can represent the same 2d plane as the base blueprint but with an offset origin and a different scale. I guess that the offset could be called datum, but I call it transform as is usual in computer graphics terminology.
For now I'm calling my different coordinate systems "Projections", but they are not projections in GIS terms, i.e. transformations from spherical to planar.
I'll soon implement support for working with maps, which will probably be WGS84 (Google maps). The term projection will for sure be used in that implementation.
Question: Should I call my 2D projections anything else than projections? Is there another term for this?