C# SharpMap.Map.ZoomToBox方法代码示例

        public static void Example2()
        {
            var map = new SharpMap.Map(new Size(1280, 1084));

            SharpMap.Data.Providers.IProvider provider =
                new SharpMap.Data.Providers.ShapeFile(
                    @"C:\temp\Data\niedersachsen.shp\railways.shp");

            var style = new SharpMap.Styles.VectorStyle();
            style.Line.Brush = Brushes.White;
            style.Line.DashPattern = new float[] { 4f, 4f };
            style.Line.Width = 4;
            style.EnableOutline = true;
            style.Outline.Brush = Brushes.Black;
            style.Outline.Width = 6;

            var vl = new SharpMap.Layers.VectorLayer("Railways", provider)
                         {Style = style};


            map.Layers.Add(vl);

            var env = vl.Envelope;
            env.ExpandBy(-0.45f *env.Width, -0.45 * env.Height);
            
            map.ZoomToBox(env);

            var mapImage = map.GetMap();
            mapImage.Save("Example2.png",
                System.Drawing.Imaging.ImageFormat.Png);
        }

        private static SharpMap.Map InitializeMapOsm()
        {
            var map = new SharpMap.Map();

            var tileLayer = new SharpMap.Layers.TileAsyncLayer(new BruTile.Web.OsmTileSource(), "TileLayer - OSM");
            map.BackgroundLayer.Add(tileLayer);
            map.ZoomToBox(tileLayer.Envelope);
            
            return map;
        }

        public void TestRealData()
        {
            var fdt = GetRealFeatureDataTable();
            FillRealDataTable(fdt);

            var p = new SharpMap.Data.Providers.FeatureProvider(fdt);


            var m = new SharpMap.Map(new Size(640, 640));
            m.Layers.Add(new TileLayer(
                new OsmTileSource(new OsmRequest(KnownTileServers.Mapnik) /*, 
                                  new FileCache(@"d:\temp\OSM", "png")*/), "OSM"));

            var l = new HeatLayer(p, "Data", 0.001f);
            l.LayerName = "HEAT";
            m.Layers.Add(l);
#if DotSpatialProjections
            l.CoordinateTransformation = new DotSpatial.Projections.CoordinateTransformation
            {
                Source = ProjectionInfo.FromEpsgCode(4326), 
                Target = ProjectionInfo.FromEpsgCode(3857)
            };
#else
            var ctfac = new ProjNet.CoordinateSystems.Transformations.CoordinateTransformationFactory();
            l.CoordinateTransformation =
                ctfac.CreateFromCoordinateSystems(ProjNet.CoordinateSystems.GeographicCoordinateSystem.WGS84,
                                                  ProjNet.CoordinateSystems.ProjectedCoordinateSystem.WebMercator);
#endif
            l.ZoomMin = 0;// 0.01 * m.GetExtents().Width;
            l.ZoomMax = /*0.9 * */m.GetExtents().Width;
            l.OpacityMax = 1;
            l.OpacityMin = 0.3f;

            m.ZoomToBox(l.Envelope);
            for (var i = 0; i < 5; i++)
            {
                using (var img = m.GetMap())
                {
                    img.Save("RealDataHeat" + i + ".png");
                }
                m.Zoom /= 2;
            }
            m.ZoomToExtents();
            using (var img = m.GetMap())
            {
                img.Save("RealDataHeat.png");
            }

        }

        public static SharpMap.Map InitializeMap(float angle)
        {
            var fdt = GetRealFeatureDataTable();
            FillRealDataTable(fdt);

            var p = new SharpMap.Data.Providers.GeometryFeatureProvider(fdt);


            var m = new SharpMap.Map();
            m.BackgroundLayer.Add(new SharpMap.Layers.TileAsyncLayer(
                new BruTile.Web.OsmTileSource(
                                  new BruTile.Web.OsmRequest(KnownTileSource.OpenStreetMap),
                                  new BruTile.Cache.FileCache(@"d:\temp\OSM", "png")), "OSM"));
            m.BackgroundLayer[0].LayerName = "TileLayer with HeatLayer";

            //var l = new SharpMap.Layers.HeatLayer(p, r => 0.02f) { LayerName = "HEAT" };
            var l = new SharpMap.Layers.HeatLayer(p, "Data", 0.00025f) { LayerName = "HEAT" };
            m.Layers.Add(l);

#if DotSpatialProjections
            l.CoordinateTransformation = new DotSpatial.Projections.CoordinateTransformation
            {
                Source = DotSpatial.Projections.ProjectionInfo.FromEpsgCode(4326),
                Target = DotSpatial.Projections.ProjectionInfo.FromEpsgCode(3857)
            };
#else
            var ctfac = new ProjNet.CoordinateSystems.Transformations.CoordinateTransformationFactory();
            l.CoordinateTransformation =
                ctfac.CreateFromCoordinateSystems(ProjNet.CoordinateSystems.GeographicCoordinateSystem.WGS84,
                                                  ProjNet.CoordinateSystems.ProjectedCoordinateSystem.WebMercator);
#endif

            l.ZoomMin = 0;// 0.01 * m.GetExtents().Width;
            l.ZoomMax = /*0.9 * */m.GetExtents().Width;
            l.OpacityMax = 0.5f;
            l.OpacityMin = 0.9f;

            l.HeatColorBlend = SharpMap.Layers.HeatLayer.Classic;

            var env = l.Envelope;
            GeoAPI.Geometries.GeoAPIEx.Grow(env, env.Width * 0.05, env.Height * 0.05);
            //m.EnforceMaximumExtents = true;
            //m.MaximumExtents = env;
            m.ZoomToBox(env);

            return m;
        }

        public static void Example1()
        {
            var map = new SharpMap.Map(new Size(1280, 1084));

            SharpMap.Data.Providers.IProvider provider =
                new SharpMap.Data.Providers.ShapeFile(
                    @"C:\temp\Data\niedersachsen.shp\railways.shp");
            var vl = new SharpMap.Layers.VectorLayer("Railways", provider);

            map.Layers.Add(vl);

            map.ZoomToBox(vl.Envelope);

            var mapImage = map.GetMap();
            mapImage.Save("Example1.png",
                System.Drawing.Imaging.ImageFormat.Png);
        }

        public void TestIncompleteImage()
        {
            using (var map = new SharpMap.Map(new Size(2500, 2500)))
            {
                map.BackColor = Color.Magenta;
                var br = new BingRequest(BingRequest.UrlBing, "", BingMapType.Hybrid);
                var bts = new BingTileSource(br);
                var tl = new TileLayer(bts, "TileLayer - " + BingMapType.Hybrid.ToString(), Color.Transparent, true,
                                       System.IO.Path.Combine(_fileCacheRoot, "BingStaging"));
                map.Layers.Add(tl);

                map.ZoomToBox(new Envelope(829384.331338522, 837200.785470394, 7068020.31417922, 7072526.73926545)
                            /*new Envelope(-239839.49199841652, 78451.759683380573, -37033.0152981899, 106723.52879865949)*/);
                using (var image = map.GetMap())
                {
                    image.Save("TestIncompleteImage.png", ImageFormat.Png);
                }
            }
        }

        public void HeatLayerTest()
        {
            var m = new SharpMap.Map(new Size(640, 480));
            var data = CreatingData.CreatePointFeatureDataTableFromArrays(
                CreatingData.GetRandomOrdinates(150, 5, 6),
                CreatingData.GetRandomOrdinates(150, 52, 53), null,
                CreatingData.GetRandomOrdinates(150, 0, 1));

            var p = new SharpMap.Data.Providers.FeatureProvider(data);
            var l = new HeatLayer(p, "Data");

            m.Layers.Add(l);
            m.ZoomToBox(new Envelope(5.4, 5.8, 52.4, 52.6));
            //m.ZoomToExtents();

            var img = m.GetMap();
            img.Save("HeatMap.png", ImageFormat.Png);
            img.Dispose();
        }

        public static void Example3()
        {
            var map = new SharpMap.Map(new Size(1280, 1084));

            SharpMap.Data.Providers.IProvider provider =
                new SharpMap.Data.Providers.ShapeFile(
                    @"C:\temp\Data\niedersachsen.shp\railways.shp");

            var cls = new SharpMap.Rendering.Symbolizer.CachedLineSymbolizer();
            cls.LineSymbolizeHandlers.Add(
                new SharpMap.Rendering.Symbolizer.PlainLineSymbolizeHandler 
                { Line = new System.Drawing.Pen(System.Drawing.Color.Gold, 2) });

            var wls = new SharpMap.Rendering.Symbolizer.WarpedLineSymbolizeHander
            {
                Pattern =
                    SharpMap.Rendering.Symbolizer.WarpedLineSymbolizer.
                    GetGreaterSeries(3, 3),
                Line = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 1),
                Interval = 20
            };
            cls.LineSymbolizeHandlers.Add(wls);

            var vl = new SharpMap.Layers.Symbolizer.LinealVectorLayer(
                "Railways", provider);
            vl.Symbolizer = cls;

            map.Layers.Add(vl);

            var env = vl.Envelope;
            env.ExpandBy(-0.45f * env.Width, -0.45 * env.Height);

            map.ZoomToBox(env);

            var mapImage = map.GetMap();
            mapImage.Save("Example3.png",
                System.Drawing.Imaging.ImageFormat.Png);
        }

        private static SharpMap.Map InitializeMapOsmWithXls(float angle)
        {
            var map = new SharpMap.Map();

            var tileLayer = new SharpMap.Layers.TileAsyncLayer(new BruTile.Web.OsmTileSource(), "TileLayer - OSM with XLS");
            map.BackgroundLayer.Add(tileLayer);

            //Get data from excel
            var xlsPath = string.Format(XlsConnectionString, System.IO.Directory.GetCurrentDirectory(), "GeoData\\Cities.xls");
            var ds = new System.Data.DataSet("XLS");
            using (var cn = new System.Data.OleDb.OleDbConnection(xlsPath))
            {
                cn.Open();
                using (var da = new System.Data.OleDb.OleDbDataAdapter(new System.Data.OleDb.OleDbCommand("SELECT * FROM [Cities$]", cn)))
                    da.Fill(ds);
            }

#if !DotSpatialProjections

            //The SRS for this datasource is EPSG:4326, therefore we need to transfrom it to OSM projection
            var ctf = new ProjNet.CoordinateSystems.Transformations.CoordinateTransformationFactory();
            var cf = new ProjNet.CoordinateSystems.CoordinateSystemFactory();
            var epsg4326 = cf.CreateFromWkt("GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS 84\",6378137,298.257223563,AUTHORITY[\"EPSG\",\"7030\"]],AUTHORITY[\"EPSG\",\"6326\"]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.01745329251994328,AUTHORITY[\"EPSG\",\"9122\"]],AUTHORITY[\"EPSG\",\"4326\"]]");
            var epsg3857 = cf.CreateFromWkt("PROJCS[\"Popular Visualisation CRS / Mercator\", GEOGCS[\"Popular Visualisation CRS\", DATUM[\"Popular Visualisation Datum\", SPHEROID[\"Popular Visualisation Sphere\", 6378137, 0, AUTHORITY[\"EPSG\",\"7059\"]], TOWGS84[0, 0, 0, 0, 0, 0, 0], AUTHORITY[\"EPSG\",\"6055\"]],PRIMEM[\"Greenwich\", 0, AUTHORITY[\"EPSG\", \"8901\"]], UNIT[\"degree\", 0.0174532925199433, AUTHORITY[\"EPSG\", \"9102\"]], AXIS[\"E\", EAST], AXIS[\"N\", NORTH], AUTHORITY[\"EPSG\",\"4055\"]], PROJECTION[\"Mercator\"], PARAMETER[\"False_Easting\", 0], PARAMETER[\"False_Northing\", 0], PARAMETER[\"Central_Meridian\", 0], PARAMETER[\"Latitude_of_origin\", 0], UNIT[\"metre\", 1, AUTHORITY[\"EPSG\", \"9001\"]], AXIS[\"East\", EAST], AXIS[\"North\", NORTH], AUTHORITY[\"EPSG\",\"3857\"]]");
            var ct = ctf.CreateFromCoordinateSystems(epsg4326, epsg3857);
            foreach (System.Data.DataRow row in ds.Tables[0].Rows)
            {
                if (row["X"] == DBNull.Value || row["Y"] == DBNull.Value) continue;
                var coords = new[] { Convert.ToDouble(row["X"]), Convert.ToDouble(row["Y"])};
                coords = ct.MathTransform.Transform(coords);
                row["X"] = coords[0];
                row["Y"] = coords[1];
            }

#else
            var epsg4326 = DotSpatial.Projections.KnownCoordinateSystems.Geographic.World.WGS1984;
            var epsg3857 = DotSpatial.Projections.ProjectionInfo.FromEsriString("PROJCS[\"Popular Visualisation CRS / Mercator\", GEOGCS[\"Popular Visualisation CRS\", DATUM[\"Popular Visualisation Datum\", SPHEROID[\"Popular Visualisation Sphere\", 6378137, 0, AUTHORITY[\"EPSG\",\"7059\"]], TOWGS84[0, 0, 0, 0, 0, 0, 0], AUTHORITY[\"EPSG\",\"6055\"]],PRIMEM[\"Greenwich\", 0, AUTHORITY[\"EPSG\", \"8901\"]], UNIT[\"degree\", 0.0174532925199433, AUTHORITY[\"EPSG\", \"9102\"]], AXIS[\"E\", EAST], AXIS[\"N\", NORTH], AUTHORITY[\"EPSG\",\"4055\"]], PROJECTION[\"Mercator\"], PARAMETER[\"False_Easting\", 0], PARAMETER[\"False_Northing\", 0], PARAMETER[\"Central_Meridian\", 0], PARAMETER[\"Latitude_of_origin\", 0], UNIT[\"metre\", 1, AUTHORITY[\"EPSG\", \"9001\"]], AXIS[\"East\", EAST], AXIS[\"North\", NORTH], AUTHORITY[\"EPSG\",\"3857\"]]");
            foreach (System.Data.DataRow row in ds.Tables[0].Rows)
            {
                if (row["X"] == DBNull.Value || row["Y"] == DBNull.Value) continue;
                var coords = new[] { Convert.ToDouble(row["X"]), Convert.ToDouble(row["Y"])};
                DotSpatial.Projections.Reproject.ReprojectPoints(coords, null, epsg4326, epsg3857, 0, 1);
                row["X"] = coords[0];
                row["Y"] = coords[1];
            }

#endif
            //Add Rotation Column
            ds.Tables[0].Columns.Add("Rotation", typeof (float));
            foreach (System.Data.DataRow row in ds.Tables[0].Rows)
                row["Rotation"] = -angle;

            //Set up provider
            var xlsProvider = new SharpMap.Data.Providers.DataTablePoint(ds.Tables[0], "OID", "X", "Y");
            var xlsLayer = new SharpMap.Layers.VectorLayer("XLS", xlsProvider)
                               {Style = {Symbol = SharpMap.Styles.VectorStyle.DefaultSymbol}};

            //Add layer to map
            map.Layers.Add(xlsLayer);
            var xlsLabelLayer = new SharpMap.Layers.LabelLayer("XLSLabel")
                                    {
                                        DataSource = xlsProvider,
                                        LabelColumn = "Name",
                                        PriorityColumn = "Population",
                                        Style =
                                            {
                                                CollisionBuffer = new System.Drawing.SizeF(2f, 2f),
                                                CollisionDetection = true
                                            },
                                        LabelFilter =
                                            SharpMap.Rendering.LabelCollisionDetection.ThoroughCollisionDetection
                                    };
            map.Layers.Add(xlsLabelLayer);

            map.ZoomToBox(tileLayer.Envelope);

            return map;
        }

        private static SharpMap.Map InitializeMapGoogle(BruTile.Web.GoogleMapType mt)
        {
            var map = new SharpMap.Map();

            BruTile.Web.GoogleRequest req;
            BruTile.ITileSource tileSource;
            SharpMap.Layers.TileLayer tileLayer;

            if (mt == (BruTile.Web.GoogleMapType.GoogleSatellite | BruTile.Web.GoogleMapType.GoogleLabels))
            {
                req = new BruTile.Web.GoogleRequest(BruTile.Web.GoogleMapType.GoogleSatellite);
                tileSource = new BruTile.Web.GoogleTileSource(req);
                tileLayer = new SharpMap.Layers.TileLayer(tileSource, "TileLayer - " + BruTile.Web.GoogleMapType.GoogleSatellite);
                map.Layers.Add(tileLayer);
                req = new BruTile.Web.GoogleRequest(BruTile.Web.GoogleMapType.GoogleLabels);
                tileSource = new BruTile.Web.GoogleTileSource(req);
                mt = BruTile.Web.GoogleMapType.GoogleLabels;
            }
            else
            {
                req = new BruTile.Web.GoogleRequest(mt);
                tileSource = new BruTile.Web.GoogleTileSource(req);
            }

            tileLayer = new SharpMap.Layers.TileLayer(tileSource, "TileLayer - " + mt);
            map.Layers.Add(tileLayer);
            map.ZoomToBox(tileLayer.Envelope);
            return map;
        }

        private static SharpMap.Map InitializeMapBing(BruTile.Web.BingMapType mt)
        {
            var map = new SharpMap.Map();

            var tileLayer = new SharpMap.Layers.TileLayer(new BruTile.Web.BingTileSource(BruTile.Web.BingRequest.UrlBingStaging, "", mt), "TileLayer - Bing " + mt);
            map.BackgroundLayer.Add(tileLayer);
            map.ZoomToBox(tileLayer.Envelope);
            return map;
        }

        private static SharpMap.Map InitializeMapOsmWithVariableLayerCollection(float angle)
        {
            var map = new SharpMap.Map();

            var tileLayer = new SharpMap.Layers.TileAsyncLayer(new BruTile.Web.OsmTileSource(), "TileLayer - OSM with VLC");
            map.BackgroundLayer.Add(tileLayer);

            var vl = new SharpMap.Layers.VectorLayer("Vilnius Transport Data - Bus", 
                new VilniusTransportData(VilniusTransportData.TransportType.Bus));
            var pttBus = new PublicTransportTheme(System.Drawing.Brushes.DarkGreen);
            vl.Theme = new SharpMap.Rendering.Thematics.CustomTheme(pttBus.GetStyle);
            vl.CoordinateTransformation = GetCoordinateTransformation();
            map.VariableLayers.Add(vl);
            vl = new SharpMap.Layers.VectorLayer("Vilnius Transport Data - Trolley", 
                new VilniusTransportData(VilniusTransportData.TransportType.TrolleyBus));
            var pttTrolley = new PublicTransportTheme(System.Drawing.Brushes.Red);
            vl.Theme = new SharpMap.Rendering.Thematics.CustomTheme(pttTrolley.GetStyle);
            vl.CoordinateTransformation = GetCoordinateTransformation();
            map.VariableLayers.Add(vl);
            SharpMap.Layers.VariableLayerCollection.Interval = 5000;

            map.ZoomToBox(vl.Envelope);

            return map;
        }

		public void ZoomToBox_WithAspectCorrection()
		{
			SharpMap.Map map = new SharpMap.Map(new System.Drawing.Size(400, 200));
			map.ZoomToBox(new SharpMap.Geometries.BoundingBox(20, 10, 100, 180));
			Assert.AreEqual(new SharpMap.Geometries.Point(60, 95), map.Center);
			Assert.AreEqual(340, map.Zoom);
		}

        public void TestTransformation()
        {
            var m = new SharpMap.Map(new System.Drawing.Size(640, 320));

            var l = new SharpMap.Layers.Symbolizer.PuntalVectorLayer("l",
            new SharpMap.Data.Providers.GeometryProvider(m.Factory.CreatePoint(new GeoAPI.Geometries.Coordinate(0, 51.478885))),
            SharpMap.Rendering.Symbolizer.PathPointSymbolizer.CreateCircle(System.Drawing.Pens.Aquamarine, System.Drawing.Brushes.BurlyWood, 24));

            var ctFact = new ProjNet.CoordinateSystems.Transformations.CoordinateTransformationFactory();
            l.CoordinateTransformation = ctFact.CreateFromCoordinateSystems(ProjNet.CoordinateSystems.GeographicCoordinateSystem.WGS84, ProjNet.CoordinateSystems.ProjectedCoordinateSystem.WebMercator);
            l.ReverseCoordinateTransformation = ctFact.CreateFromCoordinateSystems(ProjNet.CoordinateSystems.ProjectedCoordinateSystem.WebMercator, ProjNet.CoordinateSystems.GeographicCoordinateSystem.WGS84);

            m.Layers.Add(new SharpMap.Layers.TileLayer(new BruTile.Web.OsmTileSource(),"b"));
            m.Layers.Add(l);

            var e = new GeoAPI.Geometries.Envelope(-0.02, 0.02, 51.478885 - 0.01, 51.478885 + 0.01);
            e = GeoAPI.CoordinateSystems.Transformations.GeometryTransform.TransformBox(e,
                l.CoordinateTransformation.MathTransform);
            m.ZoomToBox(e);
            m.GetMap().Save("Greenwich.png", System.Drawing.Imaging.ImageFormat.Png);

        }

		public void ZoomToBox_WithAspectCorrection()
		{
			SharpMap.Map map = new SharpMap.Map(new System.Drawing.Size(400, 200));
			map.ZoomToBox(GeometryFactory.CreateEnvelope(20, 10, 100, 180));
			Assert.AreEqual(GeometryFactory.CreateCoordinate(60, 95), map.Center);
			Assert.AreEqual(340, map.Zoom);
		}