diff --git a/MapProjections/Shared/GeoApiProjection.cs b/MapProjections/Shared/GeoApiProjection.cs
index acf4a42c..1baf2ee2 100644
--- a/MapProjections/Shared/GeoApiProjection.cs
+++ b/MapProjections/Shared/GeoApiProjection.cs
@@ -96,21 +96,21 @@ namespace MapControl.Projections
 
         public IMathTransform MapToLocationTransform { get; private set; }
 
-        public override Point GetRelativeScale(Location location)
+        public override Point GetRelativeScale(double latitude, double longitude)
         {
             var k = coordinateSystem?.Projection?.GetParameter("scale_factor")?.Value ?? 1d;
 
             return new Point(k, k);
         }
 
-        public override Point? LocationToMap(Location location)
+        public override Point? LocationToMap(double latitude, double longitude)
         {
             if (LocationToMapTransform == null)
             {
                 throw new InvalidOperationException("The CoordinateSystem property is not set.");
             }
 
-            var coordinate = LocationToMapTransform.Transform(new Coordinate(location.Longitude, location.Latitude));
+            var coordinate = LocationToMapTransform.Transform(new Coordinate(longitude, latitude));
 
             if (coordinate == null)
             {
@@ -120,14 +120,14 @@ namespace MapControl.Projections
             return new Point(coordinate.X, coordinate.Y);
         }
 
-        public override Location MapToLocation(Point point)
+        public override Location MapToLocation(double x, double y)
         {
             if (MapToLocationTransform == null)
             {
                 throw new InvalidOperationException("The CoordinateSystem property is not set.");
             }
 
-            var coordinate = MapToLocationTransform.Transform(new Coordinate(point.X, point.Y));
+            var coordinate = MapToLocationTransform.Transform(new Coordinate(x, y));
 
             return new Location(coordinate.Y, coordinate.X);
         }
diff --git a/MapProjections/Shared/WebMercatorProjection.cs b/MapProjections/Shared/WebMercatorProjection.cs
index 27b15d25..c8cbb219 100644
--- a/MapProjections/Shared/WebMercatorProjection.cs
+++ b/MapProjections/Shared/WebMercatorProjection.cs
@@ -19,9 +19,9 @@ namespace MapControl.Projections
             CoordinateSystem = ProjectedCoordinateSystem.WebMercator;
         }
 
-        public override Point GetRelativeScale(Location location)
+        public override Point GetRelativeScale(double latitude, double longitude)
         {
-            var k = 1d / Math.Cos(location.Latitude * Math.PI / 180d); // p.44 (7-3)
+            var k = 1d / Math.Cos(latitude * Math.PI / 180d); // p.44 (7-3)
 
             return new Point(k, k);
         }
diff --git a/MapProjections/Shared/WorldMercatorProjection.cs b/MapProjections/Shared/WorldMercatorProjection.cs
index 56853147..8dc5b74f 100644
--- a/MapProjections/Shared/WorldMercatorProjection.cs
+++ b/MapProjections/Shared/WorldMercatorProjection.cs
@@ -40,9 +40,9 @@ namespace MapControl.Projections
                 + "AUTHORITY[\"EPSG\",\"3395\"]]";
         }
 
-        public override Point GetRelativeScale(Location location)
+        public override Point GetRelativeScale(double latitude, double longitude)
         {
-            var lat = location.Latitude * Math.PI / 180d;
+            var lat = latitude * Math.PI / 180d;
             var eSinLat = Wgs84Eccentricity * Math.Sin(lat);
             var k = Math.Sqrt(1d - eSinLat * eSinLat) / Math.Cos(lat); // p.44 (7-8)