Fix a couple of typos.

Author: kring

Editor/CesiumUrlTemplateRasterOverlayEditor.cs

@@ -117,7 +117,7 @@ private void DrawUrlTemplateProperties()
 
             EditorGUILayout.PropertyField(
                 this._projection,
-                new GUIContent("Projection", "The type of projection used to protect the imagery onto the globe."));
+                new GUIContent("Projection", "The type of projection used to project the imagery onto the globe."));
 
             EditorGUILayout.PropertyField(
                 this._specifyTilingScheme,

Runtime/CesiumUrlTemplateRasterOverlay.cs

@@ -63,7 +63,7 @@ public string templateUrl
         private CesiumUrlTemplateRasterOverlayProjection _projection = CesiumUrlTemplateRasterOverlayProjection.WebMercator;
 
         /// <summary>
-        /// The type of projection used to protect the imagery onto the globe.
+        /// The type of projection used to project the imagery onto the globe.
         /// 
         /// For instance, EPSG:4326 uses geographic projection and EPSG:3857 uses Web Mercator.
         /// </summary>
@@ -191,7 +191,7 @@ public double rectangleEast
         }
 
         [SerializeField]
-        private double _rectangleNorth = -90.0;
+        private double _rectangleNorth = 90.0;
 
         /// <summary>
         /// The north boundary of the bounding rectangle used for the quadtree tiling