--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/djol/SquareMeasureTool.js	Mon Aug 21 17:47:00 2017 +0300
@@ -0,0 +1,61 @@
+define([
+    "dojo/_base/declare",
+    "implab/safe",
+    "./MeasureToolBase",
+    "implab/text/format",
+    "dojo/i18n!./format/nls/units",
+    "ol" ],
+
+function(declare, safe, MeasureToolBase, format, units, ol) {
+    return declare([ MeasureToolBase ], {
+
+        isGeodesic : true,
+        
+        units : 'metric',
+        
+        constructor : function(opts) {
+            if (opts)
+                safe.mixin(this,opts,["isGeodesic", "units"]);
+        },
+
+        _createDraw : function(source) {
+            return new ol.interaction.Draw({
+                source : source,
+                type : "Polygon",
+                style : this.drawStyle
+            });
+        },
+
+        _formatTooltip : function(sketch, proj) {
+            var area;
+            if (this.isGeodesic) {
+                                var geom = sketch.getGeometry().clone().transform(proj, 'EPSG:4326');
+                var coordinates = geom.getLinearRing(0).getCoordinates();
+                area = Math.abs(this.wgs84Sphere.geodesicArea(coordinates));
+            } else {
+                area = sketch.getGeometry().getArea();
+            }
+            
+            var mpu, unitName;
+            switch (this.units) {
+                case "nautical":
+                    mpu = 1852*1852;
+                    unitName = units.nmiles2;
+                    break;
+                default:
+                    mpu = 1852*1852;
+                    unitName = units.kilometers2;
+            }
+
+            if (area > mpu/10) {
+                return format(
+                    "{0:#0.##} {1}",
+                    area / mpu,
+                    unitName);
+            } else {
+                return format("{0:#0.##} {1}", area, units.meters2);
+            }
+        }
+
+    });
+});
\ No newline at end of file