Thank you Alexandre, I now realise that the (-180,-90,180,90) system wont work because Im using EPSG:900913, spherical mercator, which is where The projection maxExtent: new OpenLayers.Bounds(-20037508, -20037508,20037508, 20037508.34) comes in. Thank you. But Im still stuck as to how to set the map to focus on Ireland. I dont understand how to define the bounds of a suitable box. Can you give me any pointers there? Thanks,
Eoinyp. Alexandre Dube wrote: > > Hi, > > This should helps : > > http://trac.openlayers.org/wiki/FrequentlyAskedQuestions#Projections > > Regards, > > Alexandre > > eoinyp wrote: >> Hi all, >> Could someone please explain how to define the bounds of a map? >> >> I want to centre my map on Ireland when it initialises, but I am having >> trouble with the bounds arguments. >> As I understand it, the maxExtent of the globe is (-180,-90,180,90) >> A box around Ireland using the same coordinate system is (-13.5, 51.5, >> -4.5, >> 55.5) >> So shouldnt I be defining my map as: >> maxExtent: new OpenLayers.Bounds(-13.5,51.5,-4.5,55.5 ) >> ? >> This doesnt work, unsurprisingly. >> I found somewhere else the bounds of the world defined as: >> maxExtent: new OpenLayers.Bounds(-20037508, -20037508,20037508, >> 20037508.34) >> which works great, but it shows the entire globe, as I said, I want to >> focus >> on Ireland. >> What coordinate system is this? and how do I translate the area I want to >> map to this coordinate system? >> >> The variable maxResolution also seems to vary from map to map, I am not >> sure >> what this should be set to. >> The documentation doesnt give any idea of the range of appropriate >> values. >> Thanks, >> >> Eoinyp. >> >> > > > -- > Alexandre Dubé > Mapgears > www.mapgears.com > > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users > > -- View this message in context: http://n2.nabble.com/Bounds-tp3685720p3686056.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
