http://SERVER/ new OpenLayers.Projection("EPSG:900913") new OpenLayers.Projection("EPSG:4326") 'm' 156543.0339 3 19 new OpenLayers.Bounds(-20037508, -20037508, 20037508, 20037508.34) [] TMS Road http://tile.openstreetmap.org/ 'png' osm_getTileURL true new OpenLayers.Projection("EPSG:900913") new OpenLayers.Projection("EPSG:4326") 'm' 156543.0339 3 19 new OpenLayers.Bounds(-20037508, -20037508, 20037508, 20037508.34) 8 2 TMS OverviewMap 3 19 http://tile.openstreetmap.org/ 'png' osm_getTileURL true