[OpenLayers-Users] Question about radius and bounds

[Bas Wolvers]

Hi

Im working on a openlayer - openstreet map implementation.

I was wondering can someone help me to set the closest zoomlevel when i have
a latlon and a radius in km.

For example i have a latlon :> 4.7500454  and  52.6316131
I want to center the map on this latlon and then zoom in to the closed
zoomlevel when i have a radius of 10km  (the map is always a square)

I was trying with bounds but i don't know how to subtract 10 km from the
latlon.


Thanks in advanced.

Bas
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