public void TestSimpleWebMercator()
{
// TODO: stabalize the webmercator projection numerically for lower zoom levels (0-9).
var mercator = new WebMercator();
for (int zoomLevel = 10; zoomLevel <= 25; zoomLevel++)
{
var tile = Tile.CreateAroundLocation(new GeoCoordinate(0, 0), zoomLevel);
double[] topleft = mercator.ToPixel(tile.Box.TopLeft);
double[] bottomright = mercator.ToPixel(tile.Box.BottomRight);
double scaleFactor = mercator.ToZoomFactor(zoomLevel);
Assert.AreEqual(-256, (topleft[0] - bottomright[0]) * scaleFactor, 0.01);
Assert.AreEqual(-256, (topleft[1] - bottomright[1]) * scaleFactor, 0.01);
}
var coordinate = new GeoCoordinate(51.26337, 4.78739);
double[] projected = mercator.ToPixel(coordinate);
var reProjected = mercator.ToGeoCoordinates(projected[0], projected[1]);
Assert.AreEqual(coordinate.Longitude, reProjected.Longitude, 0.0001);
Assert.AreEqual(coordinate.Latitude, reProjected.Latitude, 0.0001);
}