correctly parse ScaleHint values from WMS GetCapabilities response, thanks elemoine for the testcase, r=elemoine (closes #2150)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@9571 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Format/WMSCapabilities/v1_1.js

@@ -184,10 +184,10 @@ OpenLayers.Format.WMSCapabilities.v1_1 = OpenLayers.Class(
         var rad2 = Math.pow(2, 0.5);
         var ipm = OpenLayers.INCHES_PER_UNIT["m"];
         layer.maxScale = parseFloat(
-            ((rad2 * min) * ipm * OpenLayers.DOTS_PER_INCH).toPrecision(13)
+            ((min / rad2) * ipm * OpenLayers.DOTS_PER_INCH).toPrecision(13)
         );
         layer.minScale = parseFloat(
-            ((rad2 * max) * ipm * OpenLayers.DOTS_PER_INCH).toPrecision(13)
+            ((max / rad2) * ipm * OpenLayers.DOTS_PER_INCH).toPrecision(13)
         );
     },
     
@@ -311,4 +311,4 @@ OpenLayers.Format.WMSCapabilities.v1_1 = OpenLayers.Class(
 
     CLASS_NAME: "OpenLayers.Format.WMSCapabilities.v1_1" 
 
-});
+});

tests/Format/WMSCapabilities/v1_1_1.html

@@ -54,13 +54,25 @@
     }
     
     function test_ogc(t) {
-        t.plan(12)
+        t.plan(14)
+
+        /*
+         * Set up
+         */
         
+        // needed for the minScale/maxScale test, see below
+        var dpi = OpenLayers.DOTS_PER_INCH;
+        OpenLayers.DOTS_PER_INCH = 90.71;
+
         var xml = document.getElementById("ogcsample").firstChild.nodeValue;
         var doc = new OpenLayers.Format.XML().read(xml);
 
         var obj = new OpenLayers.Format.WMSCapabilities().read(doc);
         var capability = obj.capability;
+
+        /*
+         * Test
+         */
         
         var attribution = capability.layers[2].attribution;
         t.eq(attribution.title, "State College University", "attribution title parsed correctly.");
@@ -79,6 +91,28 @@
         t.eq(metadataURLs[0].type, "FGDC", "type parsed correctly.");
         t.eq(metadataURLs[0].format, "text/plain", "format parsed correctly.");
         t.eq(metadataURLs[0].href, "http://www.university.edu/metadata/roads.txt", "href parsed correctly.");
+
+        /*
+        Test minScale and maxScale
+
+        For Mapserver
+
+        <ScaleHint min="0.395998292216226" max="98.9995730540565" />
+
+        corresponds to (RESOLUTION keyword in MAP file has value of 90.71):
+
+        MAXSCALE 250000
+        MINSCALE 1000
+
+        */
+        t.eq(capability.layers[0].minScale, 250000, "layer.minScale is correct");
+        t.eq(capability.layers[0].maxScale, 1000, "layer.maxScale is correct");
+
+        /*
+         * Tear down
+         */
+
+        OpenLayers.DOTS_PER_INCH = dpi;
     }
     
     </script> 
@@ -310,6 +344,7 @@ Changes:
         </LegendURL>
 
     </Style>
+      <ScaleHint min="0.395998292216226" max="98.9995730540565" />
       </Layer>
       <Layer queryable="1">
     <Name>RIVERS_1M</Name>