コード例 #1
0
        /// <summary>
        /// Get tile envelope in  WGS-84 coordinates
        /// </summary>
        /// <param name="x">x index</param>
        /// <param name="y">y index</param>
        /// <param name="zoom">zoom</param>
        /// <returns>Envelope in WGS-84</returns>
        private static Envelope GetTileEnvelope(int x, int y, int zoom)
        {
            var currTopLeftPixXY = TileCalculator.TileXYToTopLeftPixelXY(x, y);
            var currTopLeftCoord = TileCalculator.PixelXYToLatLong((int)currTopLeftPixXY.X, (int)currTopLeftPixXY.Y, zoom);

            var currBtmRightPixXY = TileCalculator.TileXYToBottomRightPixelXY(x, y);
            var currBtmRightCoord = TileCalculator.PixelXYToLatLong((int)currBtmRightPixXY.X, (int)currBtmRightPixXY.Y, zoom);

            return(new Envelope(currTopLeftCoord, currBtmRightCoord));
        }
コード例 #2
0
ファイル: TileManager.cs プロジェクト: yangkf1985/DotSpatial
        /// <summary>
        ///
        /// </summary>
        /// <param name="coord"></param>
        /// <param name="zoom"></param>
        /// <returns></returns>
        public Tile GetTileFromLatLong(Coordinate coord, int zoom)
        {
            var tileXY = TileCalculator.LatLongToTileXY(coord, zoom);

            //Figure out the extent of the tile so that it can be made into MWImageData
            var tileTopLeftXY     = TileCalculator.TileXYToTopLeftPixelXY((int)tileXY.X, (int)tileXY.Y);
            var tileBottomRightXY = TileCalculator.TileXYToTopLeftPixelXY((int)tileXY.X + 1, (int)tileXY.Y + 1);

            var tileTopLeft     = TileCalculator.PixelXYToLatLong((int)tileTopLeftXY.X, (int)tileTopLeftXY.Y, zoom);
            var tileBottomRight = TileCalculator.PixelXYToLatLong((int)tileBottomRightXY.X, (int)tileBottomRightXY.Y, zoom);

            var envelope = new Envelope(tileTopLeft, tileBottomRight);

            return(GetTile(tileXY, envelope, zoom));
        }
コード例 #3
0
ファイル: TileManager.cs プロジェクト: yangkf1985/DotSpatial
        /// <summary>
        ///
        /// </summary>
        /// <param name="envelope"></param>
        /// <param name="bounds"></param>
        /// <returns></returns>
        public Tile[,] GetTiles(Envelope envelope, Rectangle bounds)
        {
            Coordinate mapTopLeft     = envelope.TopLeft();
            Coordinate mapBottomRight = envelope.BottomRight();

            //Clip the coordinates so they are in the range of the web mercator projection
            mapTopLeft.Y = TileCalculator.Clip(mapTopLeft.Y, TileCalculator.MinLatitude, TileCalculator.MaxLatitude);
            mapTopLeft.X = TileCalculator.Clip(mapTopLeft.X, TileCalculator.MinLongitude, TileCalculator.MaxLongitude);

            mapBottomRight.Y = TileCalculator.Clip(mapBottomRight.Y, TileCalculator.MinLatitude, TileCalculator.MaxLatitude);
            mapBottomRight.X = TileCalculator.Clip(mapBottomRight.X, TileCalculator.MinLongitude, TileCalculator.MaxLongitude);

            int zoom = TileCalculator.DetermineZoomLevel(envelope, bounds);

            Point topLeftTileXY  = TileCalculator.LatLongToTileXY(mapTopLeft, zoom);
            Point btmRightTileXY = TileCalculator.LatLongToTileXY(mapBottomRight, zoom);

            var tileMatrix = new Tile[(int)(btmRightTileXY.X - topLeftTileXY.X) + 1, (int)(btmRightTileXY.Y - topLeftTileXY.Y) + 1];

            Parallel.For((int)topLeftTileXY.Y, (int)btmRightTileXY.Y + 1,
                         y => Parallel.For((int)topLeftTileXY.X, (int)btmRightTileXY.X + 1,
                                           x =>
            {
                var currTopLeftPixXY = TileCalculator.TileXYToTopLeftPixelXY(x, y);
                var currTopLeftCoord = TileCalculator.PixelXYToLatLong((int)currTopLeftPixXY.X,
                                                                       (int)currTopLeftPixXY.Y, zoom);

                var currBtmRightPixXY = TileCalculator.TileXYToBottomRightPixelXY(x,
                                                                                  y);
                var currBtmRightCoord = TileCalculator.PixelXYToLatLong((int)currBtmRightPixXY.X,
                                                                        (int)currBtmRightPixXY.Y, zoom);

                var currEnv = new Envelope(currTopLeftCoord, currBtmRightCoord);

                var tile = GetTile(x, y, currEnv, zoom);
                tileMatrix[x - (int)topLeftTileXY.X, y - (int)topLeftTileXY.Y] = tile;
            }
                                           ));

            return(tileMatrix);
        }