Hola. I swear I'm not trying to be fussy here, I'd have gone for "perspective" like Green did, and that was it. However, I did a search for "conical perspective" related to design applications and what I actually found was that "conical projection" popped up several times, as opposed to "perspective" (just one by some imartinez@..., which I fear has been literally translated from Spanish into English). I think the difference lies on "perspective" being the perception the eye feels about depth/distance. Projection is the shape, form, whatever, chosen by the artist/nature (hit me now lads!). Well OK, I see now I'm really being fussy. Take it as just another option. Checking these links will help: Link 1: google findings. Link 2: a sample of those: "Geodyssey's Hipparchus C/C++ Component Function Libraries... a consequence of this design, the developer is ... functions in the application. ... h3_InitConical
Initialize conical projection...". Mmmm... Good luck and sorry for the length of this. Bye now :-)