In Reply To:
clever math??? you mean, doing stuff like
if you go uphill and the angle is alpha, would do d is it was flat and therefore do d/cos (alpha)...
and add each little segment...
pretty ok software sure...but very clever math, certainly not.
No, I don't mean that, that's all a piece of cake even to we mortals. I was referring to things like the terrain layer, which adds perspective for elevation of all of the visible terrain from the current viewpoint, or the fact that the software uses photographs that obviously are not all taken from directly above, so need to be stretched etc to match the map (you'll see the sides of some vertical buildings, but the map measurements are still correct). It's all just Pythag, but lots of it. Actually, to the average bloke in the street, basic Pythag'
is clever math! What's clever to some may not be to you, but your reply is as condescending as if somebody got excited about managing to run a 7 minute mile, and then you were to tell them that it's not fast 'cos you can run 26 of them at the end of an Ironman (if you ever finish one).