LOS and spotting

[evan]

I am sure both of these are explained in the manual and on the forum but I'm being a bit lazy about a couple of questions.

1: Trees blocking LOS; how many trees between you and the enemy will block LOS and how high are trees assumed to be from the point of view of blocking somebody on a hill?

2: Why can I never see enemy infantry untill it's far too late? OK not quite true but they seem to hide very well and I don't feel that I get the same advantage in that the Ai always seems to know where my troops and guns are all the time

3 height of hills. what is this measured in for game purpose; relates q1 above.