Version 4.12.1 Added AutoEquirectangularProjection

MapControl/Shared/AutoEquirectangularProjection.cs

@@ -0,0 +1,72 @@
+// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
+// © 2019 Clemens Fischer
+// Licensed under the Microsoft Public License (Ms-PL)
+
+using System;
+using System.Globalization;
+#if WINDOWS_UWP
+using Windows.Foundation;
+#else
+using System.Windows;
+#endif
+
+namespace MapControl
+{
+    public class AutoEquirectangularProjection : MapProjection
+    {
+        public Location ProjectionCenter { get; private set; } = new Location();
+
+        public AutoEquirectangularProjection()
+            : this("AUTO2:42004")
+        {
+        }
+
+        public AutoEquirectangularProjection(string crsId)
+        {
+            CrsId = crsId;
+            IsNormalCylindrical = true;
+        }
+
+        public override Point LocationToPoint(Location location)
+        {
+            var xScale = MetersPerDegree * Math.Cos(ProjectionCenter.Latitude * Math.PI / 180d);
+
+            return new Point(
+                xScale * (location.Longitude - ProjectionCenter.Longitude),
+                MetersPerDegree * location.Latitude);
+        }
+
+        public override Location PointToLocation(Point point)
+        {
+            var xScale = MetersPerDegree * Math.Cos(ProjectionCenter.Latitude * Math.PI / 180d);
+
+            return new Location(
+                point.Y / MetersPerDegree,
+                point.X / xScale + ProjectionCenter.Longitude);
+        }
+
+        public override void SetViewportTransform(Location projectionCenter, Location mapCenter, Point viewportCenter, double zoomLevel, double heading)
+        {
+            ProjectionCenter = projectionCenter;
+
+            base.SetViewportTransform(projectionCenter, mapCenter, viewportCenter, zoomLevel, heading);
+        }
+
+        public override string WmsQueryParameters(BoundingBox boundingBox)
+        {
+            if (string.IsNullOrEmpty(CrsId))
+            {
+                return null;
+            }
+
+            var rect = BoundingBoxToRect(boundingBox);
+            var width = (int)Math.Round(ViewportScale * rect.Width);
+            var height = (int)Math.Round(ViewportScale * rect.Height);
+
+            return string.Format(CultureInfo.InvariantCulture,
+                "CRS={0},1,{1},{2}&BBOX={3},{4},{5},{6}&WIDTH={7}&HEIGHT={8}",
+                CrsId, ProjectionCenter.Longitude, ProjectionCenter.Latitude,
+                rect.X, rect.Y, (rect.X + rect.Width), (rect.Y + rect.Height), width, height);
+        }
+    }
+}