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);
}
}
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);
}
}