Changeset 7970

Timestamp:

09/06/08 11:09:13 (2 years ago)

Author:

crschmidt

Message:

Measure includes a great circle distance, to emonstrate the ability to use
the geometry attached to the event to generate your own length measurement.

Files:

• trunk/openlayers/examples/measure.html (modified) (2 diffs)

trunk/openlayers/examples/measure.html

@@ -93 +93 @@
-            document.getElementById('noneToggle').checked = true;
-        }
+
+        function calcVincenty(geometry) {
+            var dist = 0;
+            for (var i = 1; i < geometry.components.length; i++) {
+                var first = geometry.components[i-1];
+                var second = geometry.components[i];
+                dist += OpenLayers.Util.distVincenty(
+                   new OpenLayers.LonLat(first.x, first.y), 
+                   new OpenLayers.LonLat(second.x, second.y)
+                );
+            }
+            return dist;
+        }    
-        
-        function handleMeasurements(event) {
@@ -103 +116 @@
-            if(order == 1) {
-                out += "measure: " + measure.toFixed(3) + " " + units;
+                if (map.getProjection() == "EPSG:4326") {
+                    out += "<br /> Great Circle Distance: " + 
+                        calcVincenty(geometry).toFixed(3) + " km"; 
+                }        
-            } else {
-                out += "measure: " + measure.toFixed(3) + " " + units + "<sup>2</" + "sup>";