Hello NG!

i am painting multiple markers on a map and need to change the zoom
level afterward so the user can see all of the markers in the viewing
area.
i already calculate the center position right, but deciding the zoom
level brings me to a problem.

how can i calculate which zoom level i need? is there a special sense
behind the levels?

i found an article about the scale of the levels, but i am not sure if
this is correct...
http://laudontech.com/GISBlog/?p=28
would be great if someone can bring light into this (for me)

thanks a lot in advance
lumo
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