//百度坐标转墨卡托
public static PointF LatLng2Mercator(LatLngPoint p)
{
double[] arr = null;
double n_lat = p.Lat > 74 ? 74 : p.Lat;
n_lat = n_lat < -74 ? -74 : n_lat;
for (var i = 0; i < array1.Length; i++)
{
if (p.Lat >= array1[i])
{
arr = array2[i];
break;
}
}
if (arr == null)
{
for (var i = array1.Length - 1; i >= 0; i--)
{
if (p.Lat <= -array1[i])
{
arr = array2[i];
break;
}
}
}
double[] res = Convertor(p.Lng, p.Lat, arr);
return(new PointF((float)res[0], (float)res[1]));
}
/// <summary>
/// 高德坐标系转换
/// </summary>
//高德经纬度坐标转瓦片坐标
public static Point LatLng2TileXY(LatLngPoint p, int level)
{
int tileX = (int)Math.Floor(((p.Lng + 180) / 360) * Math.Pow(2, level));
int tileY = (int)Math.Floor((1 - (Math.Log((Math.Tan(p.Lat * Math.PI / 180) + 1 / Math.Cos(p.Lat * Math.PI / 180))) / Math.PI)) * Math.Pow(2, level - 1));
return(new Point(tileX, tileY));
}
//高德经纬度坐标转瓦片坐标
public static Point LatLng2PixelXY(LatLngPoint p, int level)
{
int pixelX = (int)Math.Floor((p.Lng + 180) / 360 * Math.Pow(2, level) * 256 % 256 + 0.5);
int pixelY = (int)Math.Floor((1 - (Math.Log((Math.Tan(p.Lat * Math.PI / 180) + 1 / Math.Cos(p.Lat * Math.PI / 180))) / Math.PI)) * Math.Pow(2, level - 1) * 256 % 256 + 0.5);
return(new Point(pixelX, pixelY));
}
