// same as above
public static BoundingRect2 GeographicTilingSchemeTileXYToRectangle(int x, int y, int level)
{
double southE = -1.4844222297453324;
double northE = 1.4844222297453322;
double eastE = 3.141592653589793;
double westE = -3.141592653589793;
// y = MapUtil.FlipY(y, level);
var rectangle = new BoundingRect2()
{
East = eastE, North = northE, South = southE, West = westE
};
var xTiles = GetNumberOfXTilesAtLevel(level);
var yTiles = GetNumberOfYTilesAtLevel(level);
var xTileWidth = ComputeWidth(rectangle) / xTiles;
var west = x * xTileWidth + rectangle.West;
var east = (x + 1) * xTileWidth + rectangle.West;
var yTileHeight = ComputeHeight(rectangle) / yTiles;
var north = rectangle.North - y * yTileHeight;
var south = rectangle.North - (y + 1) * yTileHeight;
// Y is south to north in this case
// var south = rectangle.South + y * yTileHeight;
// var north = rectangle.South + (y + 1) * yTileHeight;
return(new BoundingRect2(west, south, east, north));
}
// special Cesium Code
public static double ComputeWidth(BoundingRect2 rectangle)
{
var east = rectangle.East;
var west = rectangle.West;
if (east < west)
{
east += Math.PI * 2;
}
return(east - west);
}
public static double ComputeHeight(BoundingRect2 rectangle)
{
return(rectangle.North - rectangle.South);
}