C# Map.ZoomToExtents方法代碼示例

        public static Map InitializeMap()
        {
            Map map = new Map();

            //string url = "http://labs.metacarta.com/wms-c/tilecache.py?version=1.1.1&request=GetCapabilities&service=wms-c";
            string url = "http://dev:8080/geoserver/gwc/service/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=getcapabilities&TILED=true";
            //string url = "http://dev:8080/geoserver/ows?service=wms&version=1.3.0&request=GetCapabilities&tiled=true";
            //TiledWmsLayer tiledWmsLayer = new TiledWmsLayer("Metacarta", url);
            //tiledWmsLayer.TileSetsActive.Add(tiledWmsLayer.TileSets["avalon"].Name);
            //map.Layers.Add(tiledWmsLayer);
            //map.ZoomToBox(new BoundingBox(-180.0, -90.0, 180.0, 90.0));

            //WmscRequest req;
            //ITileSource tileSource;
            TileAsyncLayer tileLayer;
            //BruTile.Web.TmsTileSource source2 = new TmsTileSource(url);

            var source = new List<ITileSource>(WmscTileSource.CreateFromWmscCapabilties(new System.Uri(url)));

            //            foreach (ITileSource src in source)
            //            {
                tileLayer = new TileAsyncLayer(source[16], "tileLayer" + source[16]);
                tileLayer.MapNewTileAvaliable += map.MapNewTileAvaliableHandler;
                map.BackgroundLayer.Add(tileLayer);
            //            }
            map.ZoomToExtents();

            return map;
        }

        public static Map InitializeMap(float angle)
        {
            string wmsUrl = "http://dev:8080/geoserver/ows?service=wms&version=1.1.1&request=GetCapabilities";

            Map map = new Map();

            WmsLayer layWms = new WmsLayer("Demis Map", wmsUrl);

            layWms.AddLayer("sf:roads");
            //layWms.AddLayer("Topography");
            //layWms.AddLayer("Hillshading");

            layWms.SetImageFormat(layWms.OutputFormats[0]);
            layWms.ContinueOnError = true;
                //Skip rendering the WMS Map if the server couldn't be requested (if set to false such an event would crash the app)
            layWms.TimeOut = 5000; //Set timeout to 5 seconds
            layWms.SRID = 4326;
            map.Layers.Add(layWms);

            //limit the zoom to 360 degrees width
            map.MaximumZoom = 360;
            map.BackColor = Color.LightBlue;

            map.Zoom = 360;
            map.Center = new Point(0, 0);

            Matrix mat = new Matrix();
            mat.RotateAt(angle, map.WorldToImage(map.Center));
            map.MapTransform = mat;

            map.ZoomToExtents();
            return map;
        }

        private static Map InitializeDXF(float angle)
        {
            Map map = new Map();
            //Set the datasource to a shapefile in the App_data folder
            Ogr provider;
            try
            {
                provider = new Ogr("GeoData/SampleDXF.dxf",0);
            }
            catch (TypeInitializationException ex)
            {
                if (ex.Message == "The type initializer for 'OSGeo.OGR.Ogr' threw an exception.")
                {
                    throw new Exception(
                        String.Format(
                            "The application threw a PINVOKE exception. You probably need to copy the unmanaged dll's to your bin directory. They are a part of fwtools {0}. You can download it from: http://home.gdal.org/fwtools/",
                            GdalRasterLayer.FWToolsVersion));
                }
                throw;
            }
            VectorLayer lay = new VectorLayer("SampleDXF", provider);
            map.Layers.Add(lay);
            map.ZoomToExtents();
            Matrix mat = new Matrix();
            mat.RotateAt(angle, map.WorldToImage(map.Center));
            map.MapTransform = mat;

            _ogrSampleDataset = "SampleDXF";
            return map;

        }

        public static Map InitializeMapOrig(float angle)
        {
            //Initialize a new map of size 'imagesize'
            Map map = new Map();

            //Set up the countries layer
            VectorLayer layRoads = new VectorLayer("Roads");
            //Set the datasource to a shapefile in the App_data folder
            layRoads.DataSource = new ShapeFile("GeoData/World/shp_textonpath/DeMo_Quan5.shp", false);
            (layRoads.DataSource as ShapeFile).Encoding = Encoding.UTF8;
            //Set fill-style to green
            layRoads.Style.Fill = new SolidBrush(Color.Yellow);
            layRoads.Style.Line = new Pen(Color.Yellow, 4);
            //Set the polygons to have a black outline
            layRoads.Style.Outline = new Pen(Color.Black, 5); ;
            layRoads.Style.EnableOutline = true;
            layRoads.SRID = 4326;

            //Set up a country label layer
            LabelLayer layLabel = new LabelLayer("Roads labels");
            layLabel.DataSource = layRoads.DataSource;
            layLabel.Enabled = true;
            layLabel.LabelColumn = "tenduong";
            layLabel.LabelFilter = SharpMap.Rendering.LabelCollisionDetection.ThoroughCollisionDetection;
            layLabel.Style = new LabelStyle();
            layLabel.Style.ForeColor = Color.White;
            layLabel.Style.Font = new Font(FontFamily.GenericSerif, 9f, FontStyle.Bold);
            layLabel.Style.Halo = new Pen(Color.Black, 2f);
            layLabel.Style.IsTextOnPath = true;
            layLabel.Style.CollisionDetection = true;
            //layLabel.Style.BackColor = new SolidBrush(Color.FromArgb(128, 255, 0, 0));
            //layLabel.MaxVisible = 90;
            //layLabel.MinVisible = 30;
            layLabel.Style.HorizontalAlignment = LabelStyle.HorizontalAlignmentEnum.Center;
            layLabel.SRID = 4326;
            //layLabel.MultipartGeometryBehaviour = LabelLayer.MultipartGeometryBehaviourEnum.Largest;

          
            //Add the layers to the map object.
            //The order we add them in are the order they are drawn, so we add the rivers last to put them on top
            map.Layers.Add(layRoads);          
            map.Layers.Add(layLabel);        


            //limit the zoom to 360 degrees width
            //map.MaximumZoom = 360;
           // map.BackColor = Color.LightBlue;

            map.ZoomToExtents();

            Matrix mat = new Matrix();
            mat.RotateAt(angle, map.WorldToImage(map.Center));
            map.MapTransform = mat;

            return map;
        }

    public static Map InitializeMap()
    {
      try
      {
        //Sample provided by Dan Brecht and Joel Wilson
        Map map = new Map();
        map.BackColor = Color.White;

        string relativePath = "GeoData/GeoTiff/";

        SharpMap.Layers.GdalRasterLayer layer;

        if (!File.Exists(relativePath + "format01-image_a.tif"))
        {
          throw new Exception("Make sure the data is in the relative directory: " + relativePath);
        }

        layer = new SharpMap.Layers.GdalRasterLayer("GeoTiffA", relativePath + "format01-image_a.tif");
        map.Layers.Add(layer);
        layer = new SharpMap.Layers.GdalRasterLayer("GeoTiffB", relativePath + "format01-image_b.tif");
        map.Layers.Add(layer);
        layer = new SharpMap.Layers.GdalRasterLayer("GeoTiffC", relativePath + "format01-image_c.tif");
        map.Layers.Add(layer);
        layer = new SharpMap.Layers.GdalRasterLayer("GeoTiffD", relativePath + "format01-image_d.tif");
        map.Layers.Add(layer);

        SharpMap.Layers.VectorLayer shapeLayer;

        if (!File.Exists(relativePath + "outline.shp"))
        {
          throw new Exception("Make sure the data is in the relative directory: " + relativePath);
        }

        shapeLayer = new SharpMap.Layers.VectorLayer("outline", new SharpMap.Data.Providers.ShapeFile(relativePath + "outline.shp"));
        shapeLayer.Style.Fill = Brushes.Transparent;
        shapeLayer.Style.Outline = Pens.Black;
        shapeLayer.Style.EnableOutline = true;
        shapeLayer.Style.Enabled = true;
        map.Layers.Add(shapeLayer);

        map.ZoomToExtents();

        return map;
      }
      catch (Exception ex)
      {
        if (ex.Message == "The type initializer for 'OSGeo.GDAL.GdalPINVOKE' threw an exception.")
        {
          throw new Exception(String.Format("The application threw a PINVOKE exception. You probably need to copy the unmanaged dll's to your bin directory. They are a part of fwtools {0}. You can download it from: http://home.gdal.org/fwtools/", SharpMap.Layers.GdalRasterLayer.FWToolsVersion));
        }
        throw;
      }

    }

        public void TestMap1()
        {
            var m = new Map(_mapSize);
            m.Layers.Add(new VectorLayer("tmp", new GeometryProvider(
                new LineString(new [] {new Coordinate(0, 0), new Coordinate(10, 10), }))));

            m.ZoomToExtents();

            Map mD = null;
            Assert.DoesNotThrow(()=>mD=SandD(m, GetFormatter()));

            TestMaps("Test1", m, mD);
        }

        public void TestMapDecorationTest()
        {
            var m = new Map(new Size(780, 540)) {BackColor = Color.White};
            var p = new GeometryProvider(new List<SharpMap.Geometries.Geometry>());
            var pts = new [] {new GeoPoint(0, 0), new GeoPoint(779, 539)};
            var ls = new SharpMap.Geometries.LineString(new List<GeoPoint>(pts));
            p.Geometries.Add(ls);
            m.Layers.Add(new VectorLayer("t",p));
            m.ZoomToExtents();

            m.Decorations.Add(new TestDecoration
                                  {
                                      Anchor = MapDecorationAnchor.LeftTop,
                                      BorderColor = Color.Green,
                                      BackgroundColor = Color.LightGreen,
                                      BorderWidth = 2,
                                      Location = new Point(10, 10),
                                      BorderMargin = new Size(5, 5),
                                      RoundedEdges = true,
                                      Opacity = 0.6f
                                  });

            m.Decorations.Add(new TestDecoration
            {
                Anchor = MapDecorationAnchor.RightTop,
                BorderColor = Color.Red,
                BackgroundColor = Color.LightCoral,
                BorderWidth = 2,
                Location = new Point(10, 10),
                BorderMargin = new Size(5, 5),
                RoundedEdges = true,
                Opacity = 0.2f
            });

            m.Decorations.Add(new ScaleBar
            {
                Anchor = MapDecorationAnchor.Default,
                BorderColor = Color.Blue,
                BackgroundColor = Color.CornflowerBlue,
                BorderWidth = 2,
                Location = new Point(10, 10),
                BorderMargin = new Size(5, 5),
                RoundedEdges = true,
                BarWidth = 4,
                ScaleText =ScaleBarLabelText.RepresentativeFraction,
                NumTicks = 2,
                Opacity = 1f
            });
            var bmp = m.GetMap();
            bmp.Save("TestMapDecorationTest.bmp");
        }

        public void TestMapDecorationTest()
        {
            Map m = new Map(new Size(780, 540)) {BackColor = Color.White, SRID = 0};
            GeoPoint[] pts = new [] {new GeoPoint(0, 0), new GeoPoint(779, 539)};
            FeatureProvider p = new FeatureProvider(m.Factory.CreateLineString(pts));
            m.Layers.Add(new VectorLayer("t",p));
            m.ZoomToExtents();

            m.Decorations.Add(new TestDecoration
                                  {
                                      Anchor = MapDecorationAnchor.LeftTop,
                                      BorderColor = Color.Green,
                                      BackgroundColor = Color.LightGreen,
                                      BorderWidth = 2,
                                      Location = new Point(10, 10),
                                      BorderMargin = new Size(5, 5),
                                      RoundedEdges = true,
                                      Opacity = 0.6f
                                  });

            m.Decorations.Add(new TestDecoration
            {
                Anchor = MapDecorationAnchor.RightTop,
                BorderColor = Color.Red,
                BackgroundColor = Color.LightCoral,
                BorderWidth = 2,
                Location = new Point(10, 10),
                BorderMargin = new Size(5, 5),
                RoundedEdges = true,
                Opacity = 0.2f
            });

            m.Decorations.Add(new ScaleBar
            {
                Anchor = MapDecorationAnchor.Default,
                BorderColor = Color.Blue,
                BackgroundColor = Color.CornflowerBlue,
                BorderWidth = 2,
                Location = new Point(10, 10),
                BorderMargin = new Size(5, 5),
                RoundedEdges = true,
                BarWidth = 4,
                ScaleText =ScaleBarLabelText.RepresentativeFraction,
                NumTicks = 2,
                Opacity = 1f
            });
            Image bmp = m.GetMap();
            bmp.Save("TestMapDecorationTest.bmp");
        }

        public void ShowMap(Map map)
        {
            MapControl.Map = map;

            map.ZoomToExtents();

            MapControl.MouseMove += delegate(object sender, MouseEventArgs e)
                                        {
                                            var point = map.ImageToWorld(new PointF(e.X, e.Y));
                                            coordinateLabel.Text = string.Format("{0}:{1}", point.X, point.Y);
                                        };

            WindowsFormsTestHelper.ShowModal(this);

            map.Dispose();
        }

        public void TestGetMap()
        {
            var m = new Map(new Size(500, 300));
            m.BackColor = Color.White;

            var p = KmlProvider.FromKml(@"TestData\KML_Samples.kml");
            var l = new VectorLayer(p.ConnectionID, p);
            l.Theme = p.GetKmlTheme();

            m.Layers.Add(l);
            m.ZoomToExtents();
            m.Zoom *= 1.1;

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

 public void TestColorMap()
 {
     var tmpFile = GdiImageLayerTest.CreateImage(new Size(300, 300), new Point(10, 10));
     using (var l = new GdiImageLayer(tmpFile))
     using (var pl = new GdiImageLayerProxy<GdiImageLayer>(l, new ColorMap{OldColor = Color.Red, NewColor = Color.MistyRose}))
     using (var m = new Map(new Size(450, 450)))
     {
         m.Layers.Add(pl);
         m.ZoomToExtents();
         using (var img = (Bitmap)m.GetMap())
         {
             var color = img.GetPixel(225, 225);
             Assert.AreEqual(Color.MistyRose.ToArgb(), color.ToArgb());
         }
     }
     GdiImageLayerTest.DeleteTmpFiles(tmpFile);
 }

 public void TestTransparency()
 {
     var tmpFile = GdiImageLayerTest.CreateImage(new Size(300, 300), new Point(10, 10));
     using(var l = new GdiImageLayer(tmpFile))
     using (var pl = new GdiImageLayerProxy<GdiImageLayer>(l, 0.3f))
     using (var m = new Map(new Size(450, 450)))
     {
         m.Layers.Add(pl);
         m.ZoomToExtents();
         using (var img = (Bitmap)m.GetMap())
         {
             var color = img.GetPixel(225, 225);
             Assert.LessOrEqual(Math.Abs((int)Math.Round(0.3f*255, MidpointRounding.AwayFromZero) - color.A),1);
         }
     }
     GdiImageLayerTest.DeleteTmpFiles(tmpFile);
 }

        public void TestPlainPolygonSymbolizer()
        {
            ShapeFile provider = new ShapeFile(
                "..\\..\\..\\WinFormSamples\\GeoData\\World\\countries.shp", true);
            PolygonalVectorLayer l = new PolygonalVectorLayer("Countries", provider);
            l.Symbolizer = new ModifiedBasicPolygonSymbolizer
                {
                    Fill = new HatchBrush(
                            HatchStyle.WideDownwardDiagonal, 
                            Color.Red /*,
                            System.Drawing.Color.LightPink*/),
                    UseClipping = false,
                    //Outline = System.Drawing.Pens.AliceBlue
                };

            Map m = new Map(new Size(1440, 1080)) { BackColor = Color.Cornsilk };
            m.Layers.Add(l);

            m.ZoomToExtents();

            Stopwatch sw = new Stopwatch();
            Image img = m.GetMap();
            
            sw.Start();
            img = m.GetMap();
            img.Save("PolygonSymbolizer-1.bmp", ImageFormat.Bmp);
            sw.Stop();
            Console.WriteLine(string.Format("Rendering new method:{0}ms", sw.ElapsedMilliseconds));

            l.Symbolizer = new BasicPolygonSymbolizer()
            {
                Fill = new HatchBrush(
                        HatchStyle.WideDownwardDiagonal,
                        Color.Red/*,
                        System.Drawing.Color.LightPink*/),
                UseClipping = false,
                //Outline = System.Drawing.Pens.AliceBlue
            };

            sw.Reset(); sw.Start();
            img = m.GetMap();
            img.Save("PolygonSymbolizer-2.bmp", ImageFormat.Bmp);
            sw.Stop();
            Console.WriteLine(string.Format("Rendering new method:{0}ms", sw.ElapsedMilliseconds));
        
        }

        public void TestBasicLineSymbolizer()
        {
            ShapeFile p = new ShapeFile(@"d:\\daten\GeoFabrik\\roads.shp", false);
            VectorLayer l = new VectorLayer("roads", p);
            //l.Style.Outline = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 5);
            l.Style.Line = new Pen(Color.Gold, 1);
            l.Style.EnableOutline = false;
            Map m = new Map(new Size(1440, 1080)) { BackColor = Color.Cornsilk };
            m.Layers.Add(l);

            m.ZoomToExtents();

            Stopwatch sw = new Stopwatch();
            sw.Start();
            m.GetMap();

            sw.Stop();
            Console.WriteLine(string.Format("Rendering old method: {0}ms", sw.ElapsedMilliseconds));
            sw.Reset();
            sw.Start();
            Image bmp = m.GetMap();
            sw.Stop();
            Console.WriteLine(string.Format("Rendering old method: {0}ms", sw.ElapsedMilliseconds));
            bmp.Save("NDSRoads1.bmp");


            CachedLineSymbolizer cls = new CachedLineSymbolizer();
            //cls.LineSymbolizeHandlers.Add(new SharpMap.Rendering.Symbolizer.PlainLineSymbolizeHandler { Line = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 5) });
            cls.LineSymbolizeHandlers.Add(new PlainLineSymbolizeHandler { Line = new Pen(Color.Gold, 1) });

            l.Style.LineSymbolizer = cls;
            sw.Reset(); sw.Start();
            bmp = m.GetMap();
            sw.Stop();
            Console.WriteLine(string.Format("Rendering new method: {0}ms", sw.ElapsedMilliseconds));
            bmp.Save("NDSRoads2.bmp");

        }

//.........這裏部分代碼省略.........
            layRivers.DataSource = new SpatiaLite(
                DataSource, "rivers", "geom", "PK_UID");
            //Define a blue 3px wide pen
            layRivers.Style.Line = new Pen(Color.LightBlue, 2);
            layRivers.Style.Line.CompoundArray = new[] { 0.2f, 0.8f };
            layRivers.Style.Outline = new Pen(Color.DarkBlue, 3);
            layRivers.Style.EnableOutline = true;

            //Set up a cities layer
            VectorLayer layCities = new VectorLayer("Cities");
            //Set the datasource to the spatialite table
            layCities.DataSource = new SpatiaLite(
                DataSource, "cities", "geom", "PK_UID");
            layCities.Style.SymbolScale = 0.8f;
            layCities.MaxVisible = 40;

            //Set up a country label layer
            LabelLayer layLabel = new LabelLayer("Country labels") 
            {
                DataSource = layCountries.DataSource,
                LabelColumn = "NAME",
                MultipartGeometryBehaviour = LabelLayer.MultipartGeometryBehaviourEnum.Largest,
                LabelFilter = LabelCollisionDetection.ThoroughCollisionDetection,
                PriorityColumn = "POPDENS",
                Style = new LabelStyle
                {
                    ForeColor = Color.White,
                    Font = new Font(FontFamily.GenericSerif, 12),
                    BackColor = new SolidBrush(Color.FromArgb(128, 255, 0, 0)),
                    HorizontalAlignment = LabelStyle.HorizontalAlignmentEnum.Center,
                    MaxVisible = 90,
                    MinVisible = 30,
                    CollisionDetection = true
                }
            };

            //Set up a city label layer
            LabelLayer layCityLabel = new LabelLayer("City labels")
            {
                DataSource = layCities.DataSource,
                LabelColumn = "name",
                PriorityColumn = "population",
                PriorityDelegate = delegate(IFeature fdr) 
                { 
                    Int32 retVal = 10000000 * ( (String)fdr.Attributes["capital"] == "Y" ? 1 : 0 );
                    return  retVal + Convert.ToInt32(fdr.Attributes["population"]);
                },
                TextRenderingHint = TextRendering.AntiAlias,
                SmoothingMode = Smoothing.AntiAlias,
                LabelFilter = LabelCollisionDetection.ThoroughCollisionDetection,
                Style = new LabelStyle
                {
                    ForeColor = Color.Black,
                    Font = new Font(FontFamily.GenericSerif, 11),
                    MaxVisible = layLabel.MinVisible,
                    HorizontalAlignment = LabelStyle.HorizontalAlignmentEnum.Left,
                    VerticalAlignment = LabelStyle.VerticalAlignmentEnum.Bottom,
                    Offset = new PointF(3, 3),
                    Halo = new Pen(Color.Yellow, 2),
                    CollisionDetection = true
                }
            };

            LabelLayer layRiverLabels = new LabelLayer("RiverLabels");
            layRiverLabels.DataSource = layRivers.DataSource;
            layRiverLabels.LabelColumn = "Name";
            layRiverLabels.PriorityDelegate = GetRiverLength;
            layRiverLabels.Style = new LabelStyle
                                       {
                                           Font = new Font("Arial", 10, FontStyle.Bold),
                                           Halo = new Pen(Color.Azure, 2),
                                           ForeColor = Color.DarkCyan,
                                           IgnoreLength = true,
                                           Enabled = true,
                                           CollisionDetection = true,
                                          
                                       };
            layRiverLabels.LabelFilter = LabelCollisionDetection.ThoroughCollisionDetection;

            //Add the layers to the map object.
            //The order we add them in are the order they are drawn, so we add the rivers last to put them on top
            map.Layers.Add(layCountries);
            map.Layers.Add(layRivers);
            map.Layers.Add(layCities);
            map.Layers.Add(layRiverLabels);
            map.Layers.Add(layLabel);
            map.Layers.Add(layCityLabel);

            //limit the zoom to 360 degrees width
            map.MaximumZoom = 360;
            map.BackColor = Color.LightBlue;

            map.ZoomToExtents(); // = 360;

            Matrix mat = new Matrix();
            mat.RotateAt(angle, map.WorldToImage(map.Center));
            map.MapTransform = mat;
            return map;

        }