public virtual void LatitudeToPixelYTest() { foreach (int tileSize in TILE_SIZES) { for (sbyte zoomLevel = ZOOM_LEVEL_MIN; zoomLevel <= ZOOM_LEVEL_MAX; ++zoomLevel) { long mapSize = MercatorProjection.GetMapSize(zoomLevel, tileSize); double pixelY = MercatorProjection.LatitudeToPixelY(MercatorProjection.LATITUDE_MAX, mapSize); Assert.AreEqual(0, pixelY, 0); pixelY = MercatorProjection.LatitudeToPixelYWithScaleFactor(MercatorProjection.LATITUDE_MAX, MercatorProjection.ZoomLevelToScaleFactor(zoomLevel), tileSize); Assert.AreEqual(0, pixelY, 0); pixelY = MercatorProjection.LatitudeToPixelY(0, mapSize); Assert.AreEqual((float)mapSize / 2, pixelY, 0); pixelY = MercatorProjection.LatitudeToPixelYWithScaleFactor(0, MercatorProjection.ZoomLevelToScaleFactor(zoomLevel), tileSize); Assert.AreEqual((float)mapSize / 2, pixelY, 0); pixelY = MercatorProjection.LatitudeToPixelY(MercatorProjection.LATITUDE_MIN, mapSize); Assert.AreEqual(mapSize, pixelY, 0); pixelY = MercatorProjection.LatitudeToPixelYWithScaleFactor(MercatorProjection.LATITUDE_MIN, MercatorProjection.ZoomLevelToScaleFactor(zoomLevel), tileSize); Assert.AreEqual(mapSize, pixelY, 0); } } }
public virtual void PixelYToLatitudeTest() { foreach (int tileSize in TILE_SIZES) { for (sbyte zoomLevel = ZOOM_LEVEL_MIN; zoomLevel <= ZOOM_LEVEL_MAX; ++zoomLevel) { long mapSize = MercatorProjection.GetMapSize(zoomLevel, tileSize); double latitude = MercatorProjection.PixelYToLatitude(0, mapSize); Assert.AreEqual(MercatorProjection.LATITUDE_MAX, latitude, 0); latitude = MercatorProjection.PixelYToLatitudeWithScaleFactor(0, MercatorProjection.ZoomLevelToScaleFactor(zoomLevel), tileSize); Assert.AreEqual(MercatorProjection.LATITUDE_MAX, latitude, 0); latitude = MercatorProjection.PixelYToLatitude((float)mapSize / 2, mapSize); Assert.AreEqual(0, latitude, 0); mapSize = MercatorProjection.GetMapSizeWithScaleFactor(MercatorProjection.ZoomLevelToScaleFactor(zoomLevel), tileSize); latitude = MercatorProjection.PixelYToLatitudeWithScaleFactor((float)mapSize / 2, MercatorProjection.ZoomLevelToScaleFactor(zoomLevel), tileSize); Assert.AreEqual(0, latitude, 0); latitude = MercatorProjection.PixelYToLatitude(mapSize, mapSize); Assert.AreEqual(MercatorProjection.LATITUDE_MIN, latitude, 0); latitude = MercatorProjection.PixelYToLatitudeWithScaleFactor(mapSize, MercatorProjection.ZoomLevelToScaleFactor(zoomLevel), tileSize); Assert.AreEqual(MercatorProjection.LATITUDE_MIN, latitude, 0); } VerifyInvalidPixelYToLatitude(-1, (sbyte)0, tileSize); VerifyInvalidPixelYToLatitude(tileSize + 1, (sbyte)0, tileSize); } }
public virtual void MetersToPixelTest() { foreach (int tileSize in TILE_SIZES) { Assert.True(MercatorProjection.MetersToPixels(10, 10.0, MercatorProjection.GetMapSize((sbyte)1, tileSize)) < 1); Assert.True(MercatorProjection.MetersToPixels((long)(40 * 10e7), 10.0, MercatorProjection.GetMapSize((sbyte)1, tileSize)) > 1); Assert.True(MercatorProjection.MetersToPixels(10, 10.0, MercatorProjection.GetMapSize((sbyte)20, tileSize)) > 1); Assert.True(MercatorProjection.MetersToPixels(10, 89.0, MercatorProjection.GetMapSize((sbyte)1, tileSize)) < 1); Assert.True(MercatorProjection.MetersToPixels((int)(40 * 10e3), 50, MercatorProjection.GetMapSize((sbyte)10, tileSize)) > 1); } }
private static void VerifyInvalidPixelYToLatitude(double pixelY, sbyte zoomLevel, int tileSize) { try { MercatorProjection.PixelYToLatitude(pixelY, MercatorProjection.GetMapSize(zoomLevel, tileSize)); Assert.Fail("pixelY: " + pixelY + ", zoomLevel: " + zoomLevel); } catch (System.ArgumentException) { Assert.True(true); } }
private static void VerifyInvalidGetMapSize(sbyte zoomLevel, int tileSize) { try { MercatorProjection.GetMapSize(zoomLevel, tileSize); Assert.Fail("zoomLevel: " + zoomLevel); } catch (System.ArgumentException) { Assert.True(true); } }
public virtual void GetMapSizeTest() { foreach (int tileSize in TILE_SIZES) { for (sbyte zoomLevel = ZOOM_LEVEL_MIN; zoomLevel <= ZOOM_LEVEL_MAX; ++zoomLevel) { long factor = (long)Math.Round(MercatorProjection.ZoomLevelToScaleFactor(zoomLevel)); Assert.AreEqual(tileSize * factor, MercatorProjection.GetMapSize(zoomLevel, tileSize)); Assert.AreEqual(MercatorProjection.GetMapSizeWithScaleFactor(MercatorProjection.ZoomLevelToScaleFactor(zoomLevel), tileSize), MercatorProjection.GetMapSize(zoomLevel, tileSize)); } VerifyInvalidGetMapSize((sbyte)-1, tileSize); } }
public virtual void TileYToLatitudeTest() { foreach (int tileSize in TILE_SIZES) { for (sbyte zoomLevel = ZOOM_LEVEL_MIN; zoomLevel <= ZOOM_LEVEL_MAX; ++zoomLevel) { double latitude = MercatorProjection.TileYToLatitude(0, zoomLevel); Assert.AreEqual(MercatorProjection.LATITUDE_MAX, latitude, 0); latitude = MercatorProjection.TileYToLatitude(0, MercatorProjection.ZoomLevelToScaleFactor(zoomLevel)); Assert.AreEqual(MercatorProjection.LATITUDE_MAX, latitude, 0); long tileY = MercatorProjection.GetMapSize(zoomLevel, tileSize) / tileSize; latitude = MercatorProjection.TileYToLatitude(tileY, zoomLevel); Assert.AreEqual(MercatorProjection.LATITUDE_MIN, latitude, 0); tileY = MercatorProjection.GetMapSizeWithScaleFactor(MercatorProjection.ZoomLevelToScaleFactor(zoomLevel), tileSize) / tileSize; latitude = MercatorProjection.TileYToLatitude(tileY, MercatorProjection.ZoomLevelToScaleFactor(zoomLevel)); Assert.AreEqual(MercatorProjection.LATITUDE_MIN, latitude, 0); } } }
/// <summary> /// Calculates the zoom level that allows to display the <seealso cref="BoundingBox"/> on a view with the <seealso cref="Dimension"/> and /// tile size. /// </summary> /// <param name="dimension"> /// the <seealso cref="Dimension"/> of the view. </param> /// <param name="boundingBox"> /// the <seealso cref="BoundingBox"/> to display. </param> /// <param name="tileSize"> /// the size of the tiles. </param> /// <returns> the zoom level that allows to display the <seealso cref="BoundingBox"/> on a view with the <seealso cref="Dimension"/> and /// tile size. </returns> public static sbyte ZoomForBounds(Dimension dimension, BoundingBox boundingBox, int tileSize) { long mapSize = MercatorProjection.GetMapSize((sbyte)0, tileSize); double pixelXMax = MercatorProjection.LongitudeToPixelX(boundingBox.MaxLongitude, mapSize); double pixelXMin = MercatorProjection.LongitudeToPixelX(boundingBox.MinLongitude, mapSize); double zoomX = -Math.Log(Math.Abs(pixelXMax - pixelXMin) / dimension.Width) / Math.Log(2); double pixelYMax = MercatorProjection.LatitudeToPixelY(boundingBox.MaxLatitude, mapSize); double pixelYMin = MercatorProjection.LatitudeToPixelY(boundingBox.MinLatitude, mapSize); double zoomY = -Math.Log(Math.Abs(pixelYMax - pixelYMin) / dimension.Height) / Math.Log(2); double zoom = Math.Floor(Math.Min(zoomX, zoomY)); if (zoom < 0) { return(0); } if (zoom > sbyte.MaxValue) { return(sbyte.MaxValue); } return((sbyte)zoom); }