Hi, Your images must have the same resolutions (units/pixel) as the map at the various zoom levels.
Arnd -----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Im Auftrag von P Kishor Gesendet: Sonntag, 7. November 2010 19:16 An: users Betreff: [OpenLayers-Users] image dims at different zoom levels Now that I have figured out how to load and unload image layers on zoom change, I am trying to wrap my head around mapping coordinates to pixels. The aim is to pre-create a bunch of images that are loaded one-to-one to give the sharpest image no matter the zoom level. I have the following coords map: # map image in pixels width : 800; height: 360; # world coordinates in spherical mercator xmin : -20037508.34 ymin : -20037508.34 xmax : 20037508.34 ymax : 20037508.34 maxres: 156543.03 start_zoom: 8 aoi: # aoi image in pixels width : ? # 244 height: ? # 184 # aoi world coordinates xmin : -10179111.60 ymin : 5638990.53 xmax : -9829162.44 ymax : 5903962.12 In other words, I want to figure out what the size of my image should be at the default zoom level 8 so it shows up as is, without any stretching or shrinking. And, I want to figure out the same at other zoom levels from 1 through 10. Nudge me in the right direction, por favor. -- Puneet Kishor _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
