public static BoundingBox GetWgs84ImageBoundingBox(int row, int column, int zoom)
{
int numberOfImages = (int)Math.Pow(2, zoom);
var unit = 360.0 / numberOfImages;
double minLongitude = column * unit;
double maxLongitude = (column + 1) * unit;
minLongitude = minLongitude - 180;
maxLongitude = maxLongitude - 180;
var yUnit = (MaxIsometricLatitude - MinIsometricLatitude) / numberOfImages;
var maxTempRow = row;
double minTempRow = row;
if (row > numberOfImages / 2.0)
{
maxTempRow = (int)(row - numberOfImages / 2.0);
minTempRow = maxTempRow + 1;
yUnit *= -1;
}
else
{
maxTempRow = (int)(numberOfImages / 2.0) - row;
minTempRow = maxTempRow - 1;
}
var latitude01 = MapProjects.IsometricLatitudeToGeodeticLatitude(maxTempRow * yUnit, FirstEccentricity);
var latitude02 = MapProjects.IsometricLatitudeToGeodeticLatitude(minTempRow * yUnit, FirstEccentricity);
double minLatitude, maxLatitude;
if (latitude01 < latitude02)
{
minLatitude = latitude01;
maxLatitude = latitude02;
}
else
{
minLatitude = latitude02;
maxLatitude = latitude01;
}
//var min = Transformation.ChangeDatum(new Point(minLongitude, minLatitude), Ellipsoids.Sphere, Ellipsoids.WGS84);
//var max = Transformation.ChangeDatum(new Point(maxLongitude, maxLatitude), Ellipsoids.Sphere, Ellipsoids.WGS84);
//return new BoundingBox(min.X, min.Y, max.X, max.Y);
return(new BoundingBox(minLongitude, minLatitude, maxLongitude, maxLatitude));
}