Dumb question: best way to make a top view screenshot

[ColdFire]

Hi

I'm looking for a way to do "from top view" screenshots of maps, like to ones used for valve heat maps.
For example, the dustbowl one:

What would be the best way to make this kind of screenshots? It seems in Hammer we cannot render 2D view, and I'm so newb with hammer I'm not sure how to really use "view -> go to coordinates" to make that.
"setpos 0 0 1200" quite puts me where I want, but I can't figure the setang part (I told you, I'm a newbie)

Thanks for your help and suggestions!

 

[Snipergen]

I used a tut for making a radar in my first css map, it used some console commands to get to that view:

http://www.fpsbanana.com/tuts/1948

 

[ColdFire]

It seems it's exactly what I need
Thank you very much!

 

[Brandished]

Try:
cl_leveloverview 1