public ActionResult Index(int x, int y, int z)
{
var ymax = 1 << z;
y = ymax - y - 1;
var memoryStream = new MemoryStream();
using (var bitmap = new Bitmap(256, 256))
using (var g = Graphics.FromImage(bitmap))
using (var pen = new Pen(Color.Blue, 2.0f))
{
g.CompositingMode = CompositingMode.SourceOver;
g.CompositingQuality = CompositingQuality.HighQuality;
var boundsGeographyLL = GetBoundingBoxInLatLng(x, y, z);
if (boundsGeographyLL.Bottom > 0)
{
var states = new GeometryDataSource().Query(boundsGeographyLL.ToSqlGeography(), "states");
var builder = new GraphicsPathBuilder(SphericalMercator.FromLonLat(boundsGeographyLL), new Size(256, 256));
foreach (var state in states)
{
var geography = (SqlGeography)state["geom"];
{
using (var gp = builder.Build(geography))
{
g.DrawPath(pen, gp);
}
}
}
}
bitmap.Save(memoryStream, ImageFormat.Png);
}
return(File(memoryStream.ToArray(), "image/png"));
}
private static GraphicsPath CreateGraphicsPath(RectangleF bounds, Bitmap bitmap, SqlGeography geography)
{
var builder = new GraphicsPathBuilder(bounds, bitmap.Size);
var gp = builder.Build(geography);
return(gp);
}