Eric Lemoine wrote: > On Monday, November 23, 2009, Andreas Hocevar <ahoce...@opengeo.org> wrote: > >> Hi, >> >> srweal wrote: >> >>> Actually, to simplify this question a bit, can someone please just explain >>> how the setting for mapExtents on a Layer, as opposed to setting mapExtents >>> on the Map differ? >>> >>> >> The maxExtent of the active base layer takes precedence over the >> maxExtent of the map. For overlays, maxExtent is only used to determine >> if the layer is to be displayed or not, i.e. if it would be visible in >> the current viewport. >> > > are you sure about that Andreas? I thought only minResolution and > maxResolution were looked at to determine whether an overlay is to be > displayed. I may be wrong, and would appreciate being corrected and > pointed to the relevant code in that case. Thanks, >
You are right, calculateInRange (which turns layer visibility on and off) only uses min/maxResolution. OpenLayers.Tile::draw determines tiles to be loaded by checking interectsBounds of the viewport with the layers maxExtent. Regards, Andreas. -- Andreas Hocevar OpenGeo - http://opengeo.org/ Expert service straight from the developers. _______________________________________________ Users mailing list Users@openlayers.org http://openlayers.org/mailman/listinfo/users
