Moved INCHES_PER_UNIT and DOTS_PER_INCH into Util.js.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@1159 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Util.js

@@ -1115,3 +1115,18 @@ OpenLayers.Util.createUniqueID = function(prefix) {
     }
     return prefix + Math.round(Math.random() * 10000);        
 };
+
+/** constant inches per unit */
+OpenLayers.INCHES_PER_UNIT = { // borrowed from MapServer mapscale.c
+    inches: 1.0,
+    in: 1.0,
+    ft: 12.0,
+    mi: 63360.0,
+    m: 39.3701,
+    km: 39370.1,
+    dd: 4374754,
+    degrees: 4374754,
+};
+
+/** sensible default */
+OpenLayers.DOTS_PER_INCH = 72;