[ka-Map-users] Scale to viewport
woodbri at swoodbridge.com
Tue Jan 24 11:49:14 EST 2006
David Badke wrote:
> Thanks for your responses - I get it now! I will add the necessary scale
> I still have a related question: why are the scale factors fixed as they
> are (that is, in the map array)? Is this a design choice, a requirement,
> or what? Not that I am saying it is bad, I just don't understand the why
> of it...
This comes from the concept of serving pre-rendered tiles like google
which in essence is what ka-map is doing. Yes it is generating the tiles
on the fly, but all the advantage is the after a while all the tiles you
need are pre-generated and cached so it is fast.
The more zoom scales you have the more sets of tiles you have to
generate. Hence the fixed (planned) number of zoom scales to you can
plan the disk space you need.
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