[OpenLayers-Users] OverviewMap - bad coords?

[Tim Schaub]

Jeff Dege wrote:
> Now I seem to remember having had a similar problem with KaMap on the
> main map, because the default tile size in OpenLayers was 256x256 and in
> KaMap was 200x200.  Which I fixed by setting the tilesize option to the
> OpenLayers.Map constructor.  So I passed a tilesize option to the
> OverviewMap constructor, and it made no difference.
> 

Please see the wiki page on the OverviewMap, specifically the section on 
custom map options[1].

You'll want to construct your overview map with some non-default 
options.  Set the mapOptions property of the options object as in the 
example, and you should get what you want.

To quote from the wiki:
The thing to keep in mind here is that the OverviewMap control is a 
control, not a map. This is an important distinction. The OverviewMap 
control *has* a map, but *it is not* a map itself. To set options on the 
control, use properties of the options object as you would with other 
controls. To set properties on the little map that the OverviewMap 
control controls, use the special mapOptions property of the options object.

Tim

[1] 
http://trac.openlayers.org/wiki/Control/OverviewMap#Custommapoptions-projectionsextentsetc.