Inheritance: Surface
コード例 #1
0
            public void EndGeometry()
            {
                GeometryType type = _CurrentType.Peek();

                switch (type)
                {
                case GeometryType.Polygon:
                    if (_Figures.Count > 0)
                    {
                        var g = new SmGeometries.Polygon(
                            (SmGeometries.LinearRing)_Figures[0],
                            _Figures.Skip(1).Cast <SmGeometries.LinearRing>().ToList <SmGeometries.LinearRing>()
                            );
                        _Figures = new SmGeometries.Geometry[] { g };
                    }
                    else
                    {
                        _Figures = new SmGeometries.Geometry[] { new SmGeometries.Polygon() }
                    };
                    break;
                }

                _CurrentType.Pop();

                if (_CurrentType.Count == 0)
                {
                    _Figures[0].SpatialReference = CoordinateSystemUtils.Convert(_SpatialReference);
                }
            }
コード例 #2
0
 public void CreatingGeometryProviderWithWkbShouldContainSpecifiedGeometries()
 {
     Point[] points = new Point[] { new Point(0, 0), new Point(1, 0), new Point(1, 1), new Point(0, 1), new Point(0, 0) };
     Polygon p = new Polygon(new LinearRing(points));
     byte[] wkb = p.AsBinary();
     GeoProvider provider = new GeoProvider(wkb);
     Assert.AreEqual(1, provider.Geometries.Count);
     Assert.AreEqual(p, provider.Geometries[0]);
 }
コード例 #3
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        protected override void OnRenderInternal(Map map, Polygon polygon, Graphics g)
        {
            // convert points
            var pts = /*LimitValues(*/polygon.TransformToImage(map)/*)*/;

            // clip
            if (UseClipping)
                pts = VectorRenderer.ClipPolygon(pts, map.Size.Width, map.Size.Height);
            
            // fill the polygon
            if (Fill != null)
                g.FillPolygon(Fill, pts);
            
            // outline the polygon
            if (Outline != null)
                g.DrawPolygon(Outline, pts);
        }
コード例 #4
0
ファイル: PolygonTests.cs プロジェクト: lishxi/_SharpMap
		public void PolygonTest()
		{
			Polygon p = new Polygon();
			Assert.IsTrue(p.IsEmpty());
			Assert.AreEqual(0, p.NumInteriorRing);
			Assert.AreEqual(p.NumInteriorRing, p.InteriorRings.Count);
			Assert.IsFalse(p.Equals(null));
			Assert.IsTrue(p.Equals(new Polygon()));
			Assert.IsNull(p.GetBoundingBox());
			LinearRing ring = new LinearRing();
			ring.Vertices.Add(new Point(10, 10));
			ring.Vertices.Add(new Point(20, 10));
			ring.Vertices.Add(new Point(20, 20));
            Assert.IsFalse(ring.IsCCW());
			ring.Vertices.Add(new Point(10, 20));
            ring.Vertices.Add(ring.Vertices[0].Clone());
            Assert.IsTrue(ring.IsPointWithin(new Point(15, 15)));
            Assert.AreNotSame(ring.Clone(), ring);
			p.ExteriorRing = ring;
            
            

			Assert.AreEqual(100, p.Area);
			LinearRing ring2 = new LinearRing();
			ring2.Vertices.Add(new Point(11, 11));
			ring2.Vertices.Add(new Point(19, 11));
			ring2.Vertices.Add(new Point(19, 19));
			ring2.Vertices.Add(new Point(11, 19));
			ring2.Vertices.Add(ring2.Vertices[0].Clone());			
			p.InteriorRings.Add(ring2);
			Assert.AreEqual(100 + 64, p.Area);
            // Reverse() doesn't exist for Collections
			//ring2.Vertices.Reverse();
			//Assert.AreEqual(100 - 64, p.Area);
			Assert.AreEqual(1, p.NumInteriorRing);
			Assert.AreEqual(new BoundingBox(10, 10, 20, 20), p.GetBoundingBox());

			Polygon p2 = p.Clone();
			Assert.AreEqual(p, p2);
			Assert.AreNotSame(p, p2);
			p2.InteriorRings.RemoveAt(0);
			Assert.AreNotEqual(p, p2);
		}
コード例 #5
0
ファイル: GeometryToWKB.cs プロジェクト: stophun/fdotoolbox
		/// <summary>
		/// Writes a polygon.
		/// </summary>
		/// <param name="poly">The polygon to be written.</param>
		/// <param name="bWriter">Stream to write to.</param>
		/// <param name="byteorder">Byte order</param>
		private static void WritePolygon(Polygon poly, BinaryWriter bWriter, WkbByteOrder byteorder)
		{
			//Get the number of rings in this polygon.
			int numRings = poly.InteriorRings.Count + 1;

			//Write the number of rings to the stream (add one for the shell)
			WriteUInt32((uint)numRings, bWriter, byteorder);

			//Write the exterior of this polygon.
			WriteLineString((LineString)poly.ExteriorRing, bWriter, byteorder);

			//Loop on the number of rings - 1 because we already wrote the shell.
			foreach (LinearRing lr in poly.InteriorRings)
				//Write the (lineString)LinearRing.
				WriteLineString((LineString)lr, bWriter, byteorder);
		}
コード例 #6
0
ファイル: GeometryTransform.cs プロジェクト: lishxi/_SharpMap
 /// <summary>
 /// Transforms a <see cref="SharpMap.Geometries.Polygon"/>.
 /// </summary>
 /// <param name="p">Polygon to transform</param>
 /// <param name="transform">MathTransform</param>
 /// <returns>Transformed Polygon</returns>
 public static Polygon TransformPolygon(Polygon p, IMathTransform transform)
 {
     Polygon pOut = new Polygon(TransformLinearRing(p.ExteriorRing, transform));
     //pOut.InteriorRings = new Collection<LinearRing>(p.InteriorRings.Count); //Pre-inialize array size for better performance
     pOut.InteriorRings = new Collection<LinearRing>();
     for (int i = 0; i < p.InteriorRings.Count; i++)
         pOut.InteriorRings.Add(TransformLinearRing(p.InteriorRings[i], transform));
     return pOut;
 }
コード例 #7
0
        private static Geometry FromShapeFilePolygon(EsriShapeBuffer shapeBuffer, out BoundingBox box)
        {
            box = null;
            if (shapeBuffer == null)
                return null;

            var hasZ = EsriShapeBuffer.HasZs(shapeBuffer.shapeType);
            var hasM = EsriShapeBuffer.HasMs(shapeBuffer.shapeType);
            using (var reader = new BinaryReader(new MemoryStream(shapeBuffer.shapeBuffer)))
            {
                var type = reader.ReadInt32();
                if (!(type == 5 || type == 15 || type == 25))
                    throw new InvalidOperationException();

                box = new BoundingBox(reader.ReadDouble(), reader.ReadDouble(), reader.ReadDouble(), reader.ReadDouble());

                var numParts = reader.ReadInt32();
                var numPoints = reader.ReadInt32();
                var allVertices = new List<Point>(numPoints);

                var parts = new int[numParts+1];
                for (var i = 0; i < numParts; i++)
                    parts[i] = reader.ReadInt32();
                parts[numParts] = numPoints;

                var res = new MultiPolygon();
                Polygon poly = null;
                for (var i = 0; i < numParts; i++)
                {
                    var count = parts[i + 1] - parts[i];
                    var vertices = new List<Point>(count);
                    for (var j = 0; j < count; j++)
                    {
                        var vertex = hasZ
                                         ? new Point3D(reader.ReadDouble(), reader.ReadDouble(), double.NaN)
                                         : new Point(reader.ReadDouble(), reader.ReadDouble());
                        vertices.Add(vertex);
                        allVertices.Add(vertex);
                    }

                    var ring = new LinearRing(vertices);
                    if (poly == null || !ring.IsCCW())
                    {
                        poly = new Polygon(ring);
                        res.Polygons.Add(poly);
                    }
                    else
                    {
                        poly.InteriorRings.Add(ring);
                    }
                }

                if (hasZ)
                {
                    var minZ = reader.ReadDouble();
                    var maxZ = reader.ReadDouble();
                    for (var i = 0; i < numPoints; i++)
                        ((Point3D) allVertices[i]).Z = reader.ReadDouble();
                }

                if (res.NumGeometries == 1)
                    return res.Polygons[0];

                return res;

            }
        }
コード例 #8
0
ファイル: GeometryToWKT.cs プロジェクト: lishxi/_SharpMap
 /// <summary>
 ///  Converts a Polygon to &lt;Polygon Tagged Text&gt; format,
 ///  then Appends it to the writer.
 /// </summary>
 /// <param name="polygon">Th Polygon to process.</param>
 /// <param name="writer">The stream writer to Append to.</param>
 private static void AppendPolygonTaggedText(Polygon polygon, StringWriter writer)
 {
     writer.Write("POLYGON ");
     AppendPolygonText(polygon, writer);
 }
コード例 #9
0
        /// <summary>
        /// Creates a Polygon using the next token in the stream.
        /// </summary>
        /// <param name="tokenizer">Tokenizer over a stream of text in Well-known Text
        ///  format. The next tokens must form a &lt;Polygon Text&gt;.</param>
        /// <returns>Returns a Polygon specified by the next token
        ///  in the stream</returns>
        ///  <remarks>
        ///  ParseException is thown if the coordinates used to create the Polygon
        ///  shell and holes do not form closed linestrings, or if an unexpected
        ///  token is encountered.
        ///  </remarks>
        private static Polygon ReadPolygonText(WktStreamTokenizer tokenizer)
        {
            Polygon pol = new Polygon();
            string nextToken = GetNextEmptyOrOpener(tokenizer);
            if (nextToken == "EMPTY")
                return pol;

            pol.ExteriorRing = new LinearRing(GetCoordinates(tokenizer));
            nextToken = GetNextCloserOrComma(tokenizer);
            while (nextToken == ",")
            {
                //Add holes
                pol.InteriorRings.Add(new LinearRing(GetCoordinates(tokenizer)));
                nextToken = GetNextCloserOrComma(tokenizer);
            }
            return pol;
        }
コード例 #10
0
ファイル: MainForm.cs プロジェクト: lishxi/_SharpMap
        private void generatePolygons(Collection<Geometry> geometry, Random rndGen)
        {
            int numPolygons = rndGen.Next(10, 100);
            for (int polyIndex = 0; polyIndex < numPolygons; polyIndex++)
            {
                Polygon polygon = new Polygon();
                Collection<GeoPoint> verticies = new Collection<GeoPoint>();
                GeoPoint upperLeft = new GeoPoint(rndGen.NextDouble()*1000, rndGen.NextDouble()*1000);
                double sideLength = rndGen.NextDouble()*50;

                // Make a square
                verticies.Add(upperLeft);
                verticies.Add(new GeoPoint(upperLeft.X + sideLength, upperLeft.Y));
                verticies.Add(new GeoPoint(upperLeft.X + sideLength, upperLeft.Y - sideLength));
                verticies.Add(new GeoPoint(upperLeft.X, upperLeft.Y - sideLength));
                polygon.ExteriorRing = new LinearRing(verticies);

                geometry.Add(polygon);
            }
        }
コード例 #11
0
ファイル: PolygonSymbolizer.cs プロジェクト: lishxi/_SharpMap
 protected static GraphicsPath PolygonToGraphicsPath(Map map, Polygon polygon)
 {
     var gp = new GraphicsPath(FillMode.Alternate);
     gp.AddPolygon(polygon.TransformToImage(map));
     return gp;
 }
コード例 #12
0
		/// <summary>
		/// Transforms a <see cref="SharpMap.Geometries.Polygon"/>.
		/// </summary>
		/// <param name="p">Polygon to transform</param>
		/// <param name="transform">MathTransform</param>
		/// <returns>Transformed Polygon</returns>
		public static Polygon TransformPolygon(Polygon p, IMathTransform transform)
		{
			Polygon pOut = new Polygon(TransformLinearRing(p.ExteriorRing, transform));

            foreach (LinearRing ring in p.InteriorRings)
                pOut.InteriorRings.Add(TransformLinearRing(ring, transform));

			return pOut;
		}
コード例 #13
0
ファイル: Polygon.cs プロジェクト: sridhar19091986/sharpmapcf
        /// <summary>
        /// Creates a deep copy of the Polygon.
        /// </summary>
        /// <returns>A copy of the Polygon instance.</returns>
        public override Geometry Clone()
        {
            Polygon p = new Polygon();
            p.ExteriorRing = ExteriorRing.Clone() as LinearRing;

            foreach (LinearRing ring in InteriorRings)
            {
                p.InteriorRings.Add(ring.Clone() as LinearRing);
            }

            return p;
        }
コード例 #14
0
ファイル: Polygon.cs プロジェクト: sridhar19091986/sharpmapcf
        ///// <summary>
        ///// Transforms the polygon to image coordinates, based on the map
        ///// </summary>
        ///// <param name="map">Map to base coordinates on</param>
        ///// <returns>Polygon in image coordinates</returns>
        //public RenderPoint[] TransformToView(SharpMap.Map map)
        //{

        //    int vertices = _ExteriorRing.Vertices.Count;
        //    for (int i = 0; i < _InteriorRings.Count;i++)
        //        vertices += _InteriorRings[i].Vertices.Count;

        //    System.Drawing.PointF[] v = new System.Drawing.PointF[vertices];
        //    for (int i = 0; i < _ExteriorRing.Vertices.Count; i++)
        //        v[i] = SharpMap.Utilities.Transform.WorldToMap(_ExteriorRing.Vertices[i], map);
        //    int j = _ExteriorRing.Vertices.Count;
        //    for (int k = 0; k < _InteriorRings.Count;k++)
        //    {
        //        for (int i = 0; i < _InteriorRings[k].Vertices.Count; i++)
        //            v[j + i] = SharpMap.Utilities.Transform.WorldToMap(_InteriorRings[k].Vertices[i], map);
        //        j += _InteriorRings[k].Vertices.Count;
        //    }
        //    return v;
        //}

        #region "Inherited methods from abstract class Geometry"

        /// <summary>
        /// Determines if this Polygon and the specified Polygon object has the same values
        /// </summary>
        /// <param name="p">Polygon to compare with</param>
        /// <returns></returns>
        public bool Equals(Polygon p)
        {
            if (ReferenceEquals(p, null))
            {
                return false;
            }

            if (!p.ExteriorRing.Equals(ExteriorRing))
            {
                return false;
            }

            if (p.InteriorRings.Count != InteriorRings.Count)
            {
                return false;
            }

            for (int i = 0; i < p.InteriorRings.Count; i++)
            {
                if (!p.InteriorRings[i].Equals(InteriorRings[i]))
                {
                    return false;
                }
            }

            return true;
        }
コード例 #15
0
ファイル: Polygon.cs プロジェクト: lishxi/_SharpMap
		/// <summary>
		/// Return a copy of this geometry
		/// </summary>
		/// <returns>Copy of Geometry</returns>
		public new Polygon Clone()
		{
			Polygon p = new Polygon();
			p.ExteriorRing = (LinearRing) this._ExteriorRing.Clone();
			for(int i=0;i<_InteriorRings.Count;i++)
				p.InteriorRings.Add(_InteriorRings[i].Clone() as LinearRing);
			return p;
		}
コード例 #16
0
ファイル: Polygon.cs プロジェクト: lishxi/_SharpMap
		/// <summary>
		/// Determines if this Polygon and the specified Polygon object has the same values
		/// </summary>
		/// <param name="p">Polygon to compare with</param>
		/// <returns></returns>
		public bool Equals(Polygon p)
		{
			if (p == null)
				return false;
			if (!p.ExteriorRing.Equals(this.ExteriorRing))
				return false;
			if (p.InteriorRings.Count != this.InteriorRings.Count)
				return false;
				for (int i = 0; i < p.InteriorRings.Count; i++)
				if (!p.InteriorRings[i].Equals(this.InteriorRings[i]))
					return false;
			return true;
		}
コード例 #17
0
            public void EndGeometry()
            {
                GeometryType type=_CurrentType.Peek();
                switch (type)
                {
                case GeometryType.Polygon:
                    if (_Figures.Count>0)
                    {
                        var g=new SmGeometries.Polygon(
                            (SmGeometries.LinearRing)_Figures[0],
                            _Figures.Skip(1).Cast<SmGeometries.LinearRing>().ToList<SmGeometries.LinearRing>()
                        );
                        _Figures=new SmGeometries.Geometry[] { g };
                    } else
                        _Figures=new SmGeometries.Geometry[] { new SmGeometries.Polygon() };
                    break;
                }

                _CurrentType.Pop();

                if (_CurrentType.Count==0)
                    _Figures[0].SpatialReference=CoordinateSystemUtils.Convert(_SpatialReference);
            }
コード例 #18
0
ファイル: ShapeFile.cs プロジェクト: lishxi/_SharpMap
        /// <summary>
        /// Reads and parses the geometry with ID 'oid' from the ShapeFile
        /// </summary>
        /// <remarks><see cref="FilterDelegate">Filtering</see> is not applied to this method</remarks>
        /// <param name="oid">Object ID</param>
        /// <returns>geometry</returns>
        private Geometry ReadGeometry(uint oid)
        {
            brShapeFile.BaseStream.Seek(GetShapeIndex(oid) + 8, 0); //Skip record number and content length
            ShapeType type = (ShapeType) brShapeFile.ReadInt32(); //Shape type
            if (type == ShapeType.Null)
                return null;
            if (_ShapeType == ShapeType.Point || _ShapeType == ShapeType.PointM || _ShapeType == ShapeType.PointZ)
            {
                Point tempFeature = new Point();
                return new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble());
            }
            else if (_ShapeType == ShapeType.Multipoint || _ShapeType == ShapeType.MultiPointM ||
                     _ShapeType == ShapeType.MultiPointZ)
            {
                brShapeFile.BaseStream.Seek(32 + brShapeFile.BaseStream.Position, 0); //skip min/max box
                MultiPoint feature = new MultiPoint();
                int nPoints = brShapeFile.ReadInt32(); // get the number of points
                if (nPoints == 0)
                    return null;
                for (int i = 0; i < nPoints; i++)
                    feature.Points.Add(new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble()));

                return feature;
            }
            else if (_ShapeType == ShapeType.PolyLine || _ShapeType == ShapeType.Polygon ||
                     _ShapeType == ShapeType.PolyLineM || _ShapeType == ShapeType.PolygonM ||
                     _ShapeType == ShapeType.PolyLineZ || _ShapeType == ShapeType.PolygonZ)
            {
                brShapeFile.BaseStream.Seek(32 + brShapeFile.BaseStream.Position, 0); //skip min/max box

                int nParts = brShapeFile.ReadInt32(); // get number of parts (segments)
                if (nParts == 0)
                    return null;
                int nPoints = brShapeFile.ReadInt32(); // get number of points

                int[] segments = new int[nParts + 1];
                //Read in the segment indexes
                for (int b = 0; b < nParts; b++)
                    segments[b] = brShapeFile.ReadInt32();
                //add end point
                segments[nParts] = nPoints;

                if ((int) _ShapeType%10 == 3)
                {
                    MultiLineString mline = new MultiLineString();
                    for (int LineID = 0; LineID < nParts; LineID++)
                    {
                        LineString line = new LineString();
                        for (int i = segments[LineID]; i < segments[LineID + 1]; i++)
                            line.Vertices.Add(new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble()));
                        mline.LineStrings.Add(line);
                    }
                    if (mline.LineStrings.Count == 1)
                        return mline[0];
                    return mline;
                }
                else //(_ShapeType == ShapeType.Polygon etc...)
                {
                    //First read all the rings
                    List<LinearRing> rings = new List<LinearRing>();
                    for (int RingID = 0; RingID < nParts; RingID++)
                    {
                        LinearRing ring = new LinearRing();
                        for (int i = segments[RingID]; i < segments[RingID + 1]; i++)
                            ring.Vertices.Add(new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble()));
                        rings.Add(ring);
                    }
                    bool[] IsCounterClockWise = new bool[rings.Count];
                    int PolygonCount = 0;
                    for (int i = 0; i < rings.Count; i++)
                    {
                        IsCounterClockWise[i] = rings[i].IsCCW();
                        if (!IsCounterClockWise[i])
                            PolygonCount++;
                    }
                    if (PolygonCount == 1) //We only have one polygon
                    {
                        Polygon poly = new Polygon();
                        poly.ExteriorRing = rings[0];
                        if (rings.Count > 1)
                            for (int i = 1; i < rings.Count; i++)
                                poly.InteriorRings.Add(rings[i]);
                        return poly;
                    }
                    else
                    {
                        MultiPolygon mpoly = new MultiPolygon();
                        Polygon poly = new Polygon();
                        poly.ExteriorRing = rings[0];
                        for (int i = 1; i < rings.Count; i++)
                        {
                            if (!IsCounterClockWise[i])
                            {
                                mpoly.Polygons.Add(poly);
                                poly = new Polygon(rings[i]);
                            }
                            else
                                poly.InteriorRings.Add(rings[i]);
                        }
                        mpoly.Polygons.Add(poly);
                        return mpoly;
                    }
                }
            }
            else
                throw (new ApplicationException("Shapefile type " + _ShapeType.ToString() + " not supported"));
        }
コード例 #19
0
ファイル: PolygonSymbolizer.cs プロジェクト: lishxi/_SharpMap
 protected abstract void OnRenderInternal(Map mpa, Polygon polygon, Graphics g);
コード例 #20
0
ファイル: GeoJSON.cs プロジェクト: diegowald/intellitrack
    /// <summary>  
    ///  Converts a Polygon to GeoJSON Polygon format,  
    ///  then Appends it to the writer.  
    /// </summary>  
    /// <param name="polygon">Th Polygon to process.</param>  
    /// <param name="writer">The stream writer to Append to.</param>  
    private static void AppendPolygonTaggedText(Polygon polygon, StringWriter writer)
    {
      //{  
      //   "type": "Polygon",  
      //   "coordinates": [  
      //       [ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0] ]  
      //   ]  
      //}  
      // with holes (inner rings)  
      //{  
      //   "type": "Polygon",  
      //   "coordinates": [  
      //       [ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0] ],  
      //       [ [100.2, 0.2], [100.8, 0.2], [100.8, 0.8], [100.2, 0.8], [100.2, 0.2] ]  
      //   ]  
      //}  

      //{  
      //"type": "Polygon",  
      //"coordinates":  
      //[ [[[0, 0], [10, 0], [10, 10], [0, 10], [0, 0]], [[5, 5], [7, 5], [7, 7], [5, 7], [5, 5]]] ]  
      //}  

      writer.WriteLine("{");
      writer.WriteLine("\"type\": \"Polygon\",");
      writer.WriteLine("\"coordinates\": ");
      //writer.Write("[ ");  
      AppendPolygonText(polygon, writer);
      //writer.WriteLine(" ]");  
      //writer.WriteLine("]");  
      writer.WriteLine("}");
    }
コード例 #21
0
ファイル: SqlServer2008.cs プロジェクト: lishxi/_SharpMap
 /// <summary>   
 /// Returns the box filter string needed in SQL query   
 /// </summary>   
 /// <param name="bbox"></param>   
 /// <returns></returns>   
 private string GetBoxFilterStr(BoundingBox bbox) {   
     //geography::STGeomFromText('LINESTRING(47.656 -122.360, 47.656 -122.343)', 4326);   
     LinearRing lr = new LinearRing();   
     lr.Vertices.Add(new Point(bbox.Left, bbox.Bottom));   
     lr.Vertices.Add(new Point(bbox.Right, bbox.Bottom));   
     lr.Vertices.Add(new Point(bbox.Right, bbox.Top));   
     lr.Vertices.Add(new Point(bbox.Left, bbox.Top));   
     lr.Vertices.Add(new Point(bbox.Left, bbox.Bottom));   
     Polygon p = new Polygon(lr);   
     string bboxText = Converters.WellKnownText.GeometryToWKT.Write(p); // "";   
     //string whereClause = GeometryColumn + ".STIntersects(geometry::STGeomFromText('" + bboxText + "', " + SRID + ")" + MakeValidString + ") = 1";   
     string whereClause = String.Format("{0}{1}.STIntersects({4}::STGeomFromText('{2}', {3})) = 1", 
         GeometryColumn, MakeValidString, bboxText, SRID, _spatialObject);
     return whereClause; // strBbox;   
 }   
コード例 #22
0
 /// <summary>
 /// Transforms a <see cref="SharpMap.Geometries.Polygon"/>.
 /// </summary>
 /// <param name="p">Polygon to transform</param>
 /// <param name="from">Source Projection</param>
 /// <param name="to">Target Projection</param>
 /// <returns>Transformed Polygon</returns>
 public static Polygon TransformPolygon(Polygon p, ProjectionInfo from, ProjectionInfo to)
 {
     var pOut = new Polygon(TransformLinearRing(p.ExteriorRing, from, to))
                    {InteriorRings = new Collection<LinearRing>()};
     //pOut.InteriorRings = new Collection<LinearRing>(p.InteriorRings.Count); //Pre-inialize array size for better performance
     for (var i = 0; i < p.InteriorRings.Count; i++)
         pOut.InteriorRings.Add(TransformLinearRing(p.InteriorRings[i], from, to));
     return pOut;
 }
コード例 #23
0
ファイル: VectorRenderer.cs プロジェクト: lishxi/_SharpMap
        public static void DrawPolygon(Graphics g, Polygon pol, Brush brush, Pen pen, bool clip, Map map)
        {
            if (pol.ExteriorRing == null)
                return;
            if (pol.ExteriorRing.Vertices.Count > 2)
            {
                //Use a graphics path instead of DrawPolygon. DrawPolygon has a problem with several interior holes
                GraphicsPath gp = new GraphicsPath();

                //Add the exterior polygon
                if (!clip)
                    gp.AddPolygon(/*LimitValues(*/pol.ExteriorRing.TransformToImage(map)/*, ExtremeValueLimit)*/);
                else
                    DrawPolygonClipped(gp, pol.ExteriorRing.TransformToImage(map), map.Size.Width, map.Size.Height);

                //Add the interior polygons (holes)
                for (int i = 0; i < pol.InteriorRings.Count; i++)
                    if (!clip)
                        gp.AddPolygon(/*LimitValues(*/pol.InteriorRings[i].TransformToImage(map)/*, ExtremeValueLimit)*/);
                    else
                        DrawPolygonClipped(gp, pol.InteriorRings[i].TransformToImage(map), map.Size.Width,
                                           map.Size.Height);

                // Only render inside of polygon if the brush isn't null or isn't transparent
                if (brush != null && brush != Brushes.Transparent)
                    g.FillPath(brush, gp);
                // Create an outline if a pen style is available
                if (pen != null)
                    g.DrawPath(pen, gp);
            }
        }
コード例 #24
0
ファイル: GeometryFactories.cs プロジェクト: lishxi/_SharpMap
        /// <summary>
        /// This method parses quickly without paying attention to
        /// context validation, polygon boundaries and multi-geometries.
        /// This accelerates the geometry parsing process, 
        /// but in scarce cases can lead to errors. 
        /// </summary>
        /// <param name="geometryType">The geometry type (Point, LineString, Polygon, MultiPoint, MultiCurve, 
        /// MultiLineString (deprecated), MultiSurface, MultiPolygon (deprecated)</param>
        /// <returns>The created geometries</returns>
        internal virtual Collection<Geometry> createQuickGeometries(string geometryType)
        {
            // Ignore multi-geometries
            if (geometryType.Equals("MultiPointPropertyType")) geometryType = "PointPropertyType";
            else if (geometryType.Equals("MultiLineStringPropertyType")) geometryType = "LineStringPropertyType";
            else if (geometryType.Equals("MultiPolygonPropertyType")) geometryType = "PolygonPropertyType";
            else if (geometryType.Equals("MultiCurvePropertyType")) geometryType = "CurvePropertyType";
            else if (geometryType.Equals("MultiSurfacePropertyType")) geometryType = "SurfacePropertyType";

            string serviceException = null;

            while (_XmlReader.Read())
            {
                if (_CoordinatesNode.Matches(_XmlReader))
                {
                    try
                    {
                        switch (geometryType)
                        {
                            case "PointPropertyType":
                                _Geoms.Add(ParseCoordinates(_XmlReader.ReadSubtree())[0]);
                                break;
                            case "LineStringPropertyType":
                            case "CurvePropertyType":
                                _Geoms.Add(new LineString(ParseCoordinates(_XmlReader.ReadSubtree())));
                                break;
                            case "PolygonPropertyType":
                            case "SurfacePropertyType":
                                Polygon polygon = new Polygon();
                                polygon.ExteriorRing = new LinearRing(ParseCoordinates(_XmlReader.ReadSubtree()));
                                _Geoms.Add(polygon);
                                break;
                            default:
                                break;
                        }
                    }
                    catch (Exception ex)
                    {
                        Trace.TraceError("An exception occured while parsing a " + geometryType + " geometry: " +
                                         ex.Message);
                        throw ex;
                    }
                    continue;
                }

                if (_ServiceExceptionNode.Matches(_XmlReader))
                {
                    serviceException = _XmlReader.ReadInnerXml();
                    Trace.TraceError("A service exception occured: " + serviceException);
                    throw new Exception("A service exception occured: " + serviceException);
                }
            }

            return _Geoms;
        }
コード例 #25
0
ファイル: GeometryFromWKB.cs プロジェクト: lishxi/_SharpMap
        private static Polygon CreateWKBPolygon(BinaryReader reader, WkbByteOrder byteOrder)
        {
            // Get the Number of rings in this Polygon.
            int numRings = (int) ReadUInt32(reader, byteOrder);

            Debug.Assert(numRings >= 1, "Number of rings in polygon must be 1 or more.");

            Polygon shell = new Polygon(CreateWKBLinearRing(reader, byteOrder));

            // Create a new array of linearrings for the interior rings.
            for (int i = 0; i < (numRings - 1); i++)
                shell.InteriorRings.Add(CreateWKBLinearRing(reader, byteOrder));

            // Create and return the Poylgon.
            return shell;
        }
コード例 #26
0
ファイル: GeometryFactories.cs プロジェクト: lishxi/_SharpMap
        /// <summary>
        /// This method produces instances of type <see cref="SharpMap.Geometries.Polygon"/>.
        /// </summary>
        /// <returns>The created geometries</returns>
        internal override Collection<Geometry> createGeometries()
        {
            Polygon polygon = null;
            XmlReader outerBoundaryReader = null;
            XmlReader innerBoundariesReader = null;

            IPathNode polygonNode = new PathNode(_GMLNS, "Polygon", (NameTable) _XmlReader.NameTable);
            IPathNode outerBoundaryNode = new PathNode(_GMLNS, "outerBoundaryIs", (NameTable) _XmlReader.NameTable);
            IPathNode exteriorNode = new PathNode(_GMLNS, "exterior", (NameTable) _XmlReader.NameTable);
            IPathNode outerBoundaryNodeAlt = new AlternativePathNodesCollection(outerBoundaryNode, exteriorNode);
            IPathNode innerBoundaryNode = new PathNode(_GMLNS, "innerBoundaryIs", (NameTable) _XmlReader.NameTable);
            IPathNode interiorNode = new PathNode(_GMLNS, "interior", (NameTable) _XmlReader.NameTable);
            IPathNode innerBoundaryNodeAlt = new AlternativePathNodesCollection(innerBoundaryNode, interiorNode);
            IPathNode linearRingNode = new PathNode(_GMLNS, "LinearRing", (NameTable) _XmlReader.NameTable);
            string[] labelValue = new string[1];
            bool geomFound = false;

            try
            {
                // Reading the entire feature's node makes it possible to collect label values that may appear before or after the geometry property
                while ((_FeatureReader = GetSubReaderOf(_XmlReader, null, _FeatureNode)) != null)
                {
                    while ((_GeomReader = GetSubReaderOf(_FeatureReader, labelValue, polygonNode)) != null)
                    {
                        polygon = new Polygon();

                        if (
                            (outerBoundaryReader =
                             GetSubReaderOf(_GeomReader, null, outerBoundaryNodeAlt, linearRingNode, _CoordinatesNode)) !=
                            null)
                            polygon.ExteriorRing = new LinearRing(ParseCoordinates(outerBoundaryReader));

                        while (
                            (innerBoundariesReader =
                             GetSubReaderOf(_GeomReader, null, innerBoundaryNodeAlt, linearRingNode, _CoordinatesNode)) !=
                            null)
                            polygon.InteriorRings.Add(new LinearRing(ParseCoordinates(innerBoundariesReader)));

                        _Geoms.Add(polygon);
                        geomFound = true;
                    }
                    if (geomFound) AddLabel(labelValue[0], _Geoms[_Geoms.Count - 1]);
                    geomFound = false;
                }
            }
            catch (Exception ex)
            {
                Trace.TraceError("An exception occured while parsing a polygon geometry: " + ex.Message);
                throw ex;
            }

            return _Geoms;
        }
コード例 #27
0
ファイル: GeometryToWKT.cs プロジェクト: lishxi/_SharpMap
 /// <summary>
 /// Converts a Polygon to &lt;Polygon Text&gt; format, then
 /// Appends it to the writer.
 /// </summary>
 /// <param name="polygon">The Polygon to process.</param>
 /// <param name="writer"></param>
 private static void AppendPolygonText(Polygon polygon, StringWriter writer)
 {
     if (polygon == null || polygon.IsEmpty())
         writer.Write("EMPTY");
     else
     {
         writer.Write("(");
         AppendLineStringText(polygon.ExteriorRing, writer);
         for (int i = 0; i < polygon.InteriorRings.Count; i++)
         {
             writer.Write(", ");
             AppendLineStringText(polygon.InteriorRings[i], writer);
         }
         writer.Write(")");
     }
 }
コード例 #28
0
        private static Geometry ToSharpMapMultiPolygon(EsriShapeBuffer shapeBuffer)
        {
            if (shapeBuffer == null)
                return null;

            var multiPartShapeBuffer = shapeBuffer as EsriMultiPartShapeBuffer;
            if (multiPartShapeBuffer == null)
            {
                BoundingBox box;
                return FromShapeFilePolygon(shapeBuffer, out box);
            }

            var hasZ = EsriShapeBuffer.HasZs(shapeBuffer.shapeType);
            var res = new MultiPolygon();
            Polygon poly = null;
            var offset = 0;
            for (var i = 0; i < multiPartShapeBuffer.NumParts; i++)
            {
                var vertices = new List<Point>(multiPartShapeBuffer.Parts[i]);
                for (var j = 0; j < multiPartShapeBuffer.Parts[i]; j++)
                {
                    var index = offset + j;
                    var point = multiPartShapeBuffer.Points[index];
                    vertices.Add(hasZ 
                        ? new Point3D(point.x, point.y, multiPartShapeBuffer.Zs[index])
                        : new Point(point.x, point.y));
                }

                var ring = new LinearRing(vertices);
                if (poly == null || !ring.IsCCW())
                {
                    poly = new Polygon(ring);
                    res.Polygons.Add(poly);
                } 
                else
                {
                    poly.InteriorRings.Add(ring);
                }

                offset += multiPartShapeBuffer.Parts[i];
            }

            if (res.NumGeometries == 1)
                return res.Polygons[0];
            
            return res;
        }