/// <summary>
/// Generates a URI at which to get the data for a tile.
/// </summary>
/// <param name="info">Information about a tile.</param>
/// <returns>The URI at which to get the data for the specified tile.</returns>
public Uri GetUri(TileInfo info)
{
var url = new StringBuilder(_baseUrl.AbsoluteUri);
url.Append("&SERVICE=WMS");
if (!string.IsNullOrEmpty(_version))
{
url.AppendFormat("&VERSION={0}", _version);
}
url.Append("&REQUEST=GetMap");
url.AppendFormat("&BBOX={0}", TileTransform.TileToWorld(new TileRange(info.Index.Col, info.Index.Row), info.Index.Level, _schema));
url.AppendFormat("&FORMAT={0}", _schema.Format);
url.AppendFormat("&WIDTH={0}", _schema.GetTileWidth(info.Index.Level));
url.AppendFormat("&HEIGHT={0}", _schema.GetTileHeight(info.Index.Level));
var crsFormat = !string.IsNullOrEmpty(_version) && string.CompareOrdinal(_version, "1.3.0") >= 0 ? "&CRS={0}" : "&SRS={0}";
url.AppendFormat(crsFormat, _schema.Srs);
url.AppendFormat("&LAYERS={0}", ToCommaSeparatedValues(_layers));
if (_styles != null && _styles.Count > 0)
{
url.AppendFormat("&STYLES={0}", ToCommaSeparatedValues(_styles));
}
AppendCustomParameters(url);
return(new Uri(url.ToString()));
}
private static TileRange WorldToTileInvertedY(Extent extent, int level, ITileSchema schema)
{
var resolution = schema.Resolutions[level];
var tileWidthWorldUnits = resolution.UnitsPerPixel * schema.GetTileWidth(level);
var tilHeightWorldUnits = resolution.UnitsPerPixel * schema.GetTileHeight(level);
var firstCol = (int)Math.Floor((extent.MinX - schema.GetOriginX(level)) / tileWidthWorldUnits + Tolerance);
var firstRow = (int)Math.Floor((-extent.MaxY + schema.GetOriginY(level)) / tilHeightWorldUnits + Tolerance);
var lastCol = (int)Math.Ceiling((extent.MaxX - schema.GetOriginX(level)) / tileWidthWorldUnits - Tolerance);
var lastRow = (int)Math.Ceiling((-extent.MinY + schema.GetOriginY(level)) / tilHeightWorldUnits - Tolerance);
return(new TileRange(firstCol, firstRow, lastCol - firstCol, lastRow - firstRow));
}
private static Extent TileToWorldInvertedY(TileRange range, int level, ITileSchema schema)
{
var resolution = schema.Resolutions[level];
var tileWidthWorldUnits = resolution.UnitsPerPixel * schema.GetTileWidth(level);
var tileHeightWorldUnits = resolution.UnitsPerPixel * schema.GetTileHeight(level);
var minX = range.FirstCol * tileWidthWorldUnits + schema.GetOriginX(level);
var minY = -(range.FirstRow + range.RowCount) * tileHeightWorldUnits + schema.GetOriginY(level);
var maxX = (range.FirstCol + range.ColCount) * tileWidthWorldUnits + schema.GetOriginX(level);
var maxY = -(range.FirstRow) * tileHeightWorldUnits + schema.GetOriginY(level);
return(new Extent(minX, minY, maxX, maxY));
}
public static void WriteWorldFile(string f, Extent extent, ITileSchema schema)
{
using (var sw = new StreamWriter(f))
{
var resX = (extent.MaxX - extent.MinX) / schema.GetTileWidth("0");
var resY = (extent.MaxY - extent.MinY) / schema.GetTileHeight("0");
sw.WriteLine(resX.ToString(CultureInfo.InvariantCulture));
sw.WriteLine("0");
sw.WriteLine("0");
sw.WriteLine((resY * -1).ToString(CultureInfo.InvariantCulture));
sw.WriteLine(extent.MinX.ToString(CultureInfo.InvariantCulture));
sw.WriteLine(extent.MaxY.ToString(CultureInfo.InvariantCulture));
sw.Close();
}
}
public static void WriteWorldFile(string f, Extent extent, ITileSchema schema)
{
using (var sw = new StreamWriter(f))
{
var resX = (extent.MaxX - extent.MinX) / schema.GetTileWidth("0");
var resY = (extent.MaxY - extent.MinY) / schema.GetTileHeight("0");
sw.WriteLine(resX.ToString(CultureInfo.InvariantCulture));
sw.WriteLine("0");
sw.WriteLine("0");
sw.WriteLine((resY * -1).ToString(CultureInfo.InvariantCulture));
sw.WriteLine(extent.MinX.ToString(CultureInfo.InvariantCulture));
sw.WriteLine(extent.MaxY.ToString(CultureInfo.InvariantCulture));
sw.Close();
}
}
private void SafeSchema(ITileSchema schema)
{
_axis = schema.YAxis;
_minX = schema.Extent.MinX;
_maxX = schema.Extent.MaxX;
_minY = schema.Extent.MinY;
_maxY = schema.Extent.MaxY;
_format = schema.Format;
_height = schema.GetTileHeight(String.Empty);
_width = schema.GetTileWidth(String.Empty);
_schemaName = schema.Name;
_originX = schema.GetOriginX(String.Empty);
_originY = schema.GetOriginY(String.Empty);
_srs = schema.Srs;
_resolutions = new Dictionary <string, Resolution>();
foreach (var resolution in schema.Resolutions)
{
_resolutions.Add(resolution.Key, resolution.Value);
}
}
private void SafeSchema(ITileSchema schema)
{
_axis = schema.YAxis;
_minX = schema.Extent.MinX;
_maxX = schema.Extent.MaxX;
_minY = schema.Extent.MinY;
_maxY = schema.Extent.MaxY;
_format = schema.Format;
_height = schema.GetTileHeight(String.Empty);
_width = schema.GetTileWidth(String.Empty);
_schemaName = schema.Name;
_originX = schema.GetOriginX(String.Empty);
_originY = schema.GetOriginY(String.Empty);
_srs = schema.Srs;
_resolutions = new Dictionary<string, Resolution>();
foreach (var resolution in schema.Resolutions)
_resolutions.Add(resolution.Key, resolution.Value);
}
private static void DrawTile(ITileSchema schema, Graphics graphics, Bitmap bitmap, RectangleF extent, int level)
{
// For drawing on WinForms there are two things to take into account
// to prevent seams between tiles.
// 1) The WrapMode should be set to TileFlipXY. This is related
// to how pixels are rounded by GDI+
var imageAttributes = new ImageAttributes();
imageAttributes.SetWrapMode(WrapMode.TileFlipXY);
// 2) The rectangle should be rounded to actual pixels.
var roundedExtent = RoundToPixel(extent);
graphics.DrawImage(bitmap, roundedExtent, 0, 0, schema.GetTileWidth(level), schema.GetTileHeight(level), GraphicsUnit.Pixel, imageAttributes);
}
private static void DrawTile(ITileSchema schema, Graphics graphics, Bitmap bitmap, RectangleF extent, string levelId)
{
// For drawing on WinForms there are two things to take into account
// to prevent seams between tiles.
// 1) The WrapMode should be set to TileFlipXY. This is related
// to how pixels are rounded by GDI+
var imageAttributes = new ImageAttributes();
imageAttributes.SetWrapMode(WrapMode.TileFlipXY);
// 2) The rectangle should be rounded to actual pixels.
var roundedExtent = RoundToPixel(extent);
graphics.DrawImage(bitmap, roundedExtent, 0, 0, schema.GetTileWidth(levelId), schema.GetTileHeight(levelId), GraphicsUnit.Pixel, imageAttributes);
}
