Changeset 7927

Timestamp:

09/02/08 11:43:57 (3 months ago)

Author:

pagameba

Message:

Tiled MapGuide layers require different base assumptions for DPI and inches per unit in order to report the correct coordinates. The example is updated with a clear explanation of how to make these changes per-application. r=me (Closes #1511)

Files:

• trunk/openlayers/examples/mapguide.html (modified) (3 diffs)

trunk/openlayers/examples/mapguide.html

@@ -22 +22 @@
-    
-        var map, layer;
-
+?USERNAME=Anonymous&
-        //you can use this URL when MapGuide OS is installed locally
-        //var url = "/mapguide/mapagent/mapagent.fcgi";
+        
+        //Adjust the scale assumptions for MapGuide layers
+        //Tiled layers MUST use a DPI value of 96, untiled layers can use a 
+        //different DPI value which will be passed to the server as a parameter.
+        //Tiled and untiled layers must adjust the OL INCHES_PER_UNIT values
+        //for any degree-based projections.
+        var metersPerUnit = 111319.4908;  //value returned from mapguide
+        var inPerUnit = OpenLayers.INCHES_PER_UNIT.m * metersPerUnit;
+        OpenLayers.INCHES_PER_UNIT["dd"] = inPerUnit;
+        OpenLayers.INCHES_PER_UNIT["degrees"] = inPerUnit;
+        OpenLayers.DOTS_PER_INCH = 96;
-        
-        //tiled version
-        function initTiled(){
-        
-            OpenLayers.DOTS_PER_INCH = 96;
-            var extent = new OpenLayers.Bounds(-3631568.75,-1293815.5,4491139.5833333321,4937122);
-            var tempScales = [50000000,23207944.16806,10772173.45016,5000000,2320794.41681,1077217.34502,500000,232079.44168,107721.7345,50000];
@@ -56 +66 @@
-        function initUntiled() {
-        
-          OpenLayers.DOTS_PER_INCH = 96;
-          var extent = new OpenLayers.Bounds(-87.865114442365922,43.665065564837931,-87.595394059497067,43.823852564430069);
-          var mapOptions = {
@@ -98 +107 @@
-              mapName: 'Sheboygan',
-              session: '0b8cb80e-0000-1000-8003-0017a4e6ff5d_en_C0A802AD0AFC0AFB0AFA',
+
+
+
+              mapName: 'Sheboygan',
+              session: '0b8cb80e-0000-1000-8003-0017a4e6ff5d_en_C0A802AD0AFC0AFB0AFA',
+              version: '2.0.0',
+              selectioncolor: '0xFF0000',
+              behavior: 7
-            };
-            layer = new OpenLayers.Layer.MapGuide( "MapGuide OS Overlay layer", url, params, options );