Ejemplo n.º 1
0
        /// <summary>
        /// Get Envelope in external coordinates.
        /// </summary>
        /// <param name="precisionModel"></param>
        /// <param name="envelope"></param>
        /// <returns></returns>
		public static IEnvelope GetEnvelopeExternal(PrecisionModel precisionModel, IEnvelope envelope)
		{
			// get envelose in external coordinates
			Coordinate min = new Coordinate(envelope.Minimum.X, envelope.Minimum.Y); 
			Coordinate max = new Coordinate(envelope.Maximum.X, envelope.Maximum.Y);
			// min = precisionModel.ToExternal(min);            
			// max = precisionModel.ToExternal(max);            
			Envelope bounds = new Envelope(min.X, max.X, min.Y, max.Y);
			return bounds;
		}
        /// <summary>
        /// 
        /// </summary>
        /// <param name="g0"></param>
        /// <param name="g1"></param>
        public GeometryGraphOperation(IGeometry g0, IGeometry g1)
        {
            // use the most precise model for the result
            if (g0.PrecisionModel.CompareTo(g1.PrecisionModel) >= 0)
                 ComputationPrecision = new PrecisionModel(g0.PrecisionModel);
            else ComputationPrecision = new PrecisionModel(g1.PrecisionModel);

            arg = new GeometryGraph[2];
            arg[0] = new GeometryGraph(0, g0);
            arg[1] = new GeometryGraph(1, g1);
        }
Ejemplo n.º 3
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		/// <summary>
		/// Imports a shapefile into a dababase Table.
		/// </summary>
		/// <remarks>
		/// This method assumes a Table has already been created in the database.
		/// Calling this method does not close the connection that is passed in.
		/// </remarks>
		/// <param name="filename"></param>
		/// <param name="connectionstring"></param>
		/// <param name="tableName"></param>
		/// <returns></returns>
		public static int ImportShapefile(string filename, string connectionstring, string tableName)
		{			
            using (SqlConnection connection = new SqlConnection(connectionstring))
            {
                int rowsAdded = -1;
                PrecisionModel pm = new PrecisionModel();
                GeometryFactory geometryFactory = new GeometryFactory(pm, -1);

                DataTable shpDataTable = Shapefile.CreateDataTable(filename, tableName, geometryFactory);
                string createTableSql = CreateDbTable(shpDataTable, true);

                SqlCommand createTableCommand = new SqlCommand(createTableSql, connection);
                connection.Open();
                createTableCommand.ExecuteNonQuery();

                string sqlSelect = String.Format("select * from {0}", tableName);
                SqlDataAdapter selectCommand = new SqlDataAdapter(sqlSelect, connection);

                // use a data adaptor - saves donig the inserts ourselves
                SqlDataAdapter dataAdapter = new SqlDataAdapter();
                dataAdapter.SelectCommand = new SqlCommand(sqlSelect, connection);
                SqlCommandBuilder custCB = new SqlCommandBuilder(dataAdapter);
                DataSet ds = new DataSet();

                // fill dataset
                dataAdapter.Fill(ds, shpDataTable.TableName);

                // copy rows from our datatable to the empty Table in the DataSet
                int i = 0;
                foreach (DataRow row in shpDataTable.Rows)
                {
                    DataRow newRow = ds.Tables[0].NewRow();
                    newRow.ItemArray = row.ItemArray;
                    //gotcha! - new row still needs to be added to the Table.
                    //NewRow() just creates a new row with the same schema as the Table. It does
                    //not add it to the Table.
                    ds.Tables[0].Rows.Add(newRow);
                    i++;
                }

                // update all the rows in batch
                rowsAdded = dataAdapter.Update(ds, shpDataTable.TableName);
                int iRows = shpDataTable.Rows.Count;
                Debug.Assert(rowsAdded != iRows, String.Format("{0} of {1} rows were added to the database.", rowsAdded, shpDataTable.Rows.Count));

                return rowsAdded;
            }
		}
Ejemplo n.º 4
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 /// <summary>
 /// 
 /// </summary>
 /// <param name="coord"></param>
 /// <param name="exemplar"></param>
 /// <returns></returns>
 private static IPoint CreatePointFromInternalCoord(Coordinate coord, IGeometry exemplar)
 {
     Coordinate c = new Coordinate(coord);
     PrecisionModel prc = new PrecisionModel(exemplar.PrecisionModel);
     prc.MakePrecise(c);
     
     return exemplar.Factory.CreatePoint(c);
 }        
 /// <summary>
 /// 
 /// </summary>
 /// <param name="pm"></param>
 public SimpleGeometryPrecisionReducer(PrecisionModel pm)
 {
     _newPrecisionModel = pm;
 }
 /// <summary>
 /// Initializes a new instance of the <see cref="SimpleSnapRounder"/> class.
 /// </summary>
 /// <param name="pm">The <see cref="PrecisionModel" /> to use.</param>
 public SimpleSnapRounder(PrecisionModel pm) 
 {            
     _li = new RobustLineIntersector();
     _li.PrecisionModel = pm;
     _scaleFactor = pm.Scale;
 }
Ejemplo n.º 7
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 /// <summary>
 /// Constructs a GeometryFactory that generates Geometries having the given
 /// <c>PrecisionModel</c> and spatial-reference ID, and the default CoordinateSequence
 /// implementation.
 /// </summary>
 /// <param name="precisionModel">The PrecisionModel to use.</param>
 /// <param name="srid">The SRID to use.</param>
 public GeometryFactory(PrecisionModel precisionModel, int srid) 
     : this(precisionModel, srid, GetDefaultCoordinateSequenceFactory()) { }
Ejemplo n.º 8
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        /// <summary>
        /// Constructs a GeometryFactory pertaining to a specific _coordinateSequenceFactory
        /// using any valid IGeometryFactory and ICoordinateSequenceFactory interface
        /// </summary>
        /// <param name="gf">An IGeometryFactory Interface</param>
        /// <param name="coordinateSequenceFactory">An ICoordianteSequenceFactory interface</param>
        public GeometryFactory(IGeometryFactory gf, ICoordinateSequenceFactory coordinateSequenceFactory)
        {
            _precisionModel = new PrecisionModel(gf.PrecisionModel);
            _coordinateSequenceFactory = coordinateSequenceFactory;
            _srid = gf.SRID;

        }
Ejemplo n.º 9
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        /// <summary>
        /// 
        /// </summary>
        /// <param name="g"></param>
        /// <param name="distance"></param>
        /// <returns></returns>
        public IGeometry Buffer(IGeometry g, double distance)
        {
            PrecisionModel precisionModel = workingPrecisionModel;
            if (precisionModel == null)
                precisionModel = new PrecisionModel(g.PrecisionModel);

            // factory must be the same as the one used by the input
            geomFact = g.Factory;

            OffsetCurveBuilder curveBuilder = new OffsetCurveBuilder(precisionModel, quadrantSegments);
            curveBuilder.EndCapStyle = endCapStyle;
            OffsetCurveSetBuilder curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);

            IList bufferSegStrList = curveSetBuilder.GetCurves();

            // short-circuit test
            if (bufferSegStrList.Count <= 0)
            {
                IGeometry emptyGeom = geomFact.CreateGeometryCollection(new Geometry[0]);
                return emptyGeom;
            }

            ComputeNodedEdges(bufferSegStrList, precisionModel);
            graph = new PlanarGraph(new OverlayNodeFactory());
            graph.AddEdges(edgeList.Edges);

            IList subgraphList = CreateSubgraphs(graph);
            PolygonBuilder polyBuilder = new PolygonBuilder(geomFact);
            BuildSubgraphs(subgraphList, polyBuilder);
            IList resultPolyList = polyBuilder.Polygons;

            IGeometry resultGeom = geomFact.BuildGeometry(resultPolyList);
            return resultGeom;
        }
Ejemplo n.º 10
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 /// <summary>
 /// Constructs a GeometryFactory that generates Geometries having the given
 /// PrecisionModel, spatial-reference ID, and CoordinateSequence implementation.
 /// </summary>        
 /// <param name="precisionModel"></param>
 /// <param name="srid"></param>
 /// <param name="coordinateSequenceFactory"></param>       
 public GeometryFactory(PrecisionModel precisionModel, int srid,
                        ICoordinateSequenceFactory coordinateSequenceFactory) 
 {
     _precisionModel = precisionModel;
     _coordinateSequenceFactory = coordinateSequenceFactory;
     _srid = srid;
 }
Ejemplo n.º 11
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 /// <summary>
 /// Initializes a new instance of the <see cref="IteratedNoder"/> class.
 /// </summary>
 /// <param name="pm"></param>
 public IteratedNoder(PrecisionModel pm)
 {
     li = new RobustLineIntersector();
     li.PrecisionModel = pm;
 }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="g0"></param>
        public GeometryGraphOperation(IGeometry g0) 
        {
            ComputationPrecision = new PrecisionModel(g0.PrecisionModel);

            arg = new GeometryGraph[1];
            arg[0] = new GeometryGraph(0, g0);;
        }
Ejemplo n.º 13
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 /// <summary>  
 /// Creates the <c>NumberFormatInfo</c> used to write <c>double</c>s
 /// with a sufficient number of decimal places.
 /// </summary>
 /// <param name="precisionModel"> 
 /// The <c>PrecisionModel</c> used to determine
 /// the number of decimal places to write.
 /// </param>
 /// <returns>
 /// A <c>NumberFormatInfo</c> that write <c>double</c>
 /// s without scientific notation.
 /// </returns>
 private static NumberFormatInfo CreateFormatter(PrecisionModel precisionModel) 
 {
     // the default number of decimal places is 16, which is sufficient
     // to accomodate the maximum precision of a double.
     int decimalPlaces = precisionModel.MaximumSignificantDigits;
     // specify decimal separator explicitly to avoid problems in other locales
     NumberFormatInfo nfi = new NumberFormatInfo();
     nfi.NumberDecimalSeparator = ".";
     nfi.NumberDecimalDigits = decimalPlaces;
     nfi.NumberGroupSeparator = String.Empty;
     nfi.NumberGroupSizes = new int[] { };
     return nfi;            
 }
Ejemplo n.º 14
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 /// <summary>
 /// 
 /// </summary>
 /// <param name="bufferSegStrList"></param>
 /// <param name="precisionModel"></param>
 private void ComputeNodedEdges(IList bufferSegStrList, PrecisionModel precisionModel)
 {
     INoder noder = GetNoder(precisionModel);
     noder.ComputeNodes(bufferSegStrList);
     IList nodedSegStrings = noder.GetNodedSubstrings();
     
     foreach(object obj in nodedSegStrings)
     {
         SegmentString segStr = (SegmentString)obj;
         Label oldLabel = (Label)segStr.Data;
         Edge edge = new Edge(segStr.Coordinates, new Label(oldLabel));
         InsertEdge(edge);
     }
 }
Ejemplo n.º 15
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        /// <summary>
        /// 
        /// </summary>
        /// <param name="precisionModel"></param>
        /// <returns></returns>
        private INoder GetNoder(PrecisionModel precisionModel)
        {
            if (workingNoder != null) 
                return workingNoder;

            // otherwise use a fast (but non-robust) noder
            LineIntersector li = new RobustLineIntersector();
            li.PrecisionModel = precisionModel;
            MCIndexNoder noder = new MCIndexNoder(new IntersectionAdder(li));                     
            return noder;
        }
Ejemplo n.º 16
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 /// <summary>
 /// Constructs a GeometryFactory object from any valid IGeometryFactory interface
 /// </summary>
 /// <param name="gf"></param>
 public GeometryFactory(IGeometryFactory gf)
 {
     _precisionModel = new PrecisionModel(gf.PrecisionModel);
     _coordinateSequenceFactory = GetDefaultCoordinateSequenceFactory();
     _srid = gf.SRID;
 }
Ejemplo n.º 17
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        /// <summary>
        /// 
        /// </summary>
        /// <param name="precisionDigits"></param>
        private void BufferFixedPrecision(int precisionDigits)
        {
            double sizeBasedScaleFactor = PrecisionScaleFactor(argGeom, distance, precisionDigits);

            PrecisionModel fixedPM = new PrecisionModel(sizeBasedScaleFactor);

            // don't change the precision model of the Geometry, just reduce the precision
            SimpleGeometryPrecisionReducer reducer = new SimpleGeometryPrecisionReducer(fixedPM);
            IGeometry reducedGeom = reducer.Reduce(argGeom);       

            BufferBuilder bufBuilder = new BufferBuilder();
            bufBuilder.WorkingPrecisionModel = fixedPM;
            bufBuilder.QuadrantSegments = quadrantSegments;

            // this may throw an exception, if robustness errors are encountered
            resultGeometry = bufBuilder.Buffer(reducedGeom, distance);
        }
Ejemplo n.º 18
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 /// <summary> 
 /// Copy constructor to create a new <c>PrecisionModel</c>
 /// from an existing one.
 /// </summary>
 /// <param name="pm"></param>
 public PrecisionModel(PrecisionModel pm) 
 {
     modelType = pm.modelType;
     scale = pm.scale;
 }