If you do not wish to load overlayed layers at startup you can load them via your own layer control mechanism when the user wants to see them.
http://demo.cubewerx.com.au/OSDM/interopDemo01.html In this demo, I load no layers other than the base. I then build a Layer control of my own that shows all selected layers in the LayerSwitcher as well. If you have loaded the layer once the cache remember the tiles and is faster on a redisplay. Works well for me. Cheers, Brad -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of R. Ortner Sent: Thursday, 11 October 2007 10:44 PM To: [email protected] Subject: Re: [OpenLayers-Users] preload layers This is what OpenLayers is supposed to do. If something else is happening, it is either a misconfiguration or a bug. Can you share the HTML this is happening with? Regards, -- Christopher Schmidt MetaCarta _______________________________________________ <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html xmlns="http://www.w3.org/1999/xhtml";> <head> <style type="text/css"> #map { width: 100%; height: 100%; border: 1px solid black; } </style> <script src="http://172.21.18.45/openlayers/lib/OpenLayers.js";></script> <script type="text/javascript"> var map; function init(){ var options = { scales: [600000, 250000, 12500, 75000, 30000, 10000] }; map = new OpenLayers.Map('map', {'projection':'EPSG:31258', 'units':'m', 'maxExtent': new OpenLayers.Bounds(390730, 119473, 594760, 238680), 'maxResolution': "auto" }, { controls: [] }); //map.addControl(new OpenLayers.Control.PanZoomBar()); map.addControl(new OpenLayers.Control.MouseToolbar()); //map.addControl(new OpenLayers.Control.MousePosition()); //map.addControl(new OpenLayers.Control.OverviewMap()); map.addControl(new OpenLayers.Control.Scale()); // --------------------------------------------- Layer ------------------------------------------------------// // ---------------------------------------------------------------------------- -------------------- // ---------------------------------- WMS --------------------------------------------------------- // ---------------------------------------------------------------------------- -------------------- var oek50_wms = new OpenLayers.Layer.WMS( "OEK50 WMS", "http://172.21.18.45/cgi-bin/mapserv?";, {layers: 'OEK50',map:'/usr/share/ka-map-1.0-20070205/htdocs/geoland_test.map', transparent: 'true', format: 'png'}, {'isBaseLayer':false}, {projection: "EPSG:31258"}); oek50_wms.setVisibility(false) var ortho_wms = new OpenLayers.Layer.WMS( "Orthophotos WMS", "http://172.21.18.45/cgi-bin/mapserv?";, {layers: 'Orthofotos',map:'/usr/share/ka-map-1.0-20070205/htdocs/geoland_test.map', format: 'png24'}, {'isBaseLayer':false}, {projection: "EPSG:31258"}); ortho_wms.setVisibility(false) var land_wms = new OpenLayers.Layer.WMS( "Land WMS", "http://172.21.18.45/cgi-bin/mapserv?";, {layers: 'Land',map:'/usr/share/ka-map-1.0-20070205/htdocs/geoland_test.map', transparent: 'true', format: 'png'}, {'isBaseLayer':false}, {projection: "EPSG:31258"}); land_wms.setVisibility(false) var bezirk_wms = new OpenLayers.Layer.WMS( "Bezirk WMS", "http://172.21.18.45/cgi-bin/mapserv?";, {layers: 'Bezirk',map:'/usr/share/ka-map-1.0-20070205/htdocs/geoland_test.map', transparent: 'true', format: 'png'},{projection: "EPSG:31258"}, {'isBaseLayer':false}); bezirk_wms.setVisibility(false) var gemeinde_wms = new OpenLayers.Layer.WMS( "Gemeinde WMS", "http://172.21.18.45/cgi-bin/mapserv?";, {layers: 'Gemeinde',map:'/usr/share/ka-map-1.0-20070205/htdocs/geoland_test.map', transparent: 'true', format: 'png'},{projection: "EPSG:31258"}, {'isBaseLayer':false}); gemeinde_wms.setVisibility(false) // ---------------------------------------------------------------------------- -------------------- // -------------------------------- ka-Map -------------------------------------------------------- // ---------------------------------------------------------------------------- -------------------- //var ortho_kamap = new OpenLayers.Layer.KaMap( "Orthophotos ka-Map", //"http://172.21.18.45/ka-map/tile.php";, {g: 'Orthophotos', map: '/usr/share/ka-map-1.0-20070205/htdocs/geoland_test.map', transparent: 'true', i: 'png'}, {'isBaseLayer':false}); //ortho_kamap.setVisibility(false) var oek50_kamap = new OpenLayers.Layer.KaMap( "OEK50 ka-Map", "http://172.21.18.45/ka-map/tile.php";, {g: 'OEK50', map: '/usr/share/ka-map-1.0-20070205/htdocs/geoland_test.map', transparent: 'true', i: 'png'}, {'isBaseLayer':false}); oek50_kamap.setVisibility(false) var land_kamap = new OpenLayers.Layer.KaMap( "Land ka-Map", "http://172.21.18.45/ka-map/tile.php";, {g: 'Land', map: '/usr/share/ka-map-1.0-20070205/htdocs/geoland_test.map', transparent: 'true', i: 'png'}, {'isBaseLayer':true}); land_kamap.setVisibility(true) var bezirk_kamap = new OpenLayers.Layer.KaMap( "Bezirk ka-Map", "http://172.21.18.45/ka-map/tile.php";, {g: 'Bezirk', map: '/usr/share/ka-map-1.0-20070205/htdocs/geoland_test.map', transparent: 'true', i: 'png'}, {'isBaseLayer':false}); bezirk_kamap.setVisibility(true) var gemeinde_kamap = new OpenLayers.Layer.KaMap( "Gemeinde ka-Map", "http://172.21.18.45/ka-map/tile.php";, {g: 'Gemeinde', map: '/usr/share/ka-map-1.0-20070205/htdocs/geoland_test.map', transparent: 'true', i: 'png'}, {'isBaseLayer':false}); gemeinde_kamap.setVisibility(false) map.addLayers([ortho_wms, oek50_wms, oek50_kamap, land_wms, bezirk_wms, bezirk_kamap, gemeinde_wms, gemeinde_kamap, land_kamap]); map.addControl(new OpenLayers.Control.LayerSwitcher()); map.zoomToMaxExtent(); } </script> </head> <body onload="init()"> <!-- <h1>Orthophotos</h1> --> <div id="map"></div> </body> </html> -- View this message in context: http://www.nabble.com/preload-layers-tf4605757.html#a13154913 Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
