[ka-Map-users] get the level up for keyMap

[Matias Thayer]

hi all,

i'am  trying to modify the keymap to make this to show 1 scale level up that
the current view in the main map(like the keymap from yahoo maps).
 I have modified the keymap.php to acept an image from an extent, but i
don't know how i can get the extent corresponding to 1 scale level up from
current view form main map.

Thanks for any help  (and sorry by my english)

Matias
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