Example #1
0
        /// <summary>
        /// Initializes a new instance of the Shapefile class with the given parameters.
        /// </summary>
        /// <param name="filename">The filename of the shape file to read (with .shp).</param>
        /// <param name="geometryFactory">The GeometryFactory to use when creating Geometry objects.</param>
        public ShapefileReader(string filename, IGeometryFactory geometryFactory)
        {
            if (filename == null)
            {
                throw new ArgumentNullException("filename");
            }
            if (geometryFactory == null)
            {
                throw new ArgumentNullException("geometryFactory");
            }

            _filename        = filename;
            _geometryFactory = geometryFactory;

            // read header information. note, we open the file, read the header information and then
            // close the file. This means the file is not opened again until GetEnumerator() is requested.
            // For each call to GetEnumerator() a new BinaryReader is created.
            FileStream            stream          = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read);
            BigEndianBinaryReader shpBinaryReader = new BigEndianBinaryReader(stream);

            _mainHeader = new ShapefileHeader(shpBinaryReader);
            shpBinaryReader.Close();
        }
        /// <summary>
        /// Initializes a new instance of the ShapefileDataReader class.
        /// </summary>
        /// <param name="filename">The shapefile to read (minus the .shp extension)</param>
        ///<param name="geometryFactory">The GeometryFactory to use.</param>
        public ShapefileDataReader(string filename, IGeometryFactory geometryFactory)
        {
            if (filename == null)
            {
                throw new ArgumentNullException("filename");
            }
            if (geometryFactory == null)
            {
                throw new ArgumentNullException("geometryFactory");
            }
            _geometryFactory = geometryFactory;
            _open            = true;

            if (filename.ToLower().EndsWith(".shp"))
            {
                filename = filename.ToLower().Replace(".shp", String.Empty);
            }

            _dbfReader = new DbaseFileReader(filename + ".dbf");
            _shpReader = new ShapefileReader(filename + ".shp", geometryFactory);

            _dbfHeader   = _dbfReader.GetHeader();
            _recordCount = _dbfHeader.NumRecords;

            // copy dbase fields to our own array. Insert into the first position, the shape column
            _dbaseFields    = new DbaseFieldDescriptor[_dbfHeader.Fields.Length + 1];
            _dbaseFields[0] = DbaseFieldDescriptor.ShapeField();
            for (int i = 0; i < _dbfHeader.Fields.Length; i++)
            {
                _dbaseFields[i + 1] = _dbfHeader.Fields[i];
            }

            _shpHeader     = _shpReader.Header;
            _dbfEnumerator = _dbfReader.GetEnumerator();
            _shpEnumerator = _shpReader.GetEnumerator();
            _moreRecords   = true;
        }
Example #3
0
		/// <summary>
		/// Initializes a new instance of the Shapefile class with the given parameters.
		/// </summary>
		/// <param name="filename">The filename of the shape file to read (with .shp).</param>
		/// <param name="geometryFactory">The GeometryFactory to use when creating Geometry objects.</param>
		public ShapefileReader(string filename, IGeometryFactory geometryFactory)
		{           
			if (filename == null)
				throw new ArgumentNullException("filename");
			if (geometryFactory == null)
				throw new ArgumentNullException("geometryFactory");
			
            _filename = filename;
            _geometryFactory = geometryFactory;					

			// read header information. note, we open the file, read the header information and then
			// close the file. This means the file is not opened again until GetEnumerator() is requested.
			// For each call to GetEnumerator() a new BinaryReader is created.
			FileStream stream = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read);
			BigEndianBinaryReader shpBinaryReader = new BigEndianBinaryReader(stream);
			_mainHeader = new ShapefileHeader(shpBinaryReader);
			shpBinaryReader.Close();
		}
Example #4
0
		/// <summary>
		/// Writes a shapefile to disk.
		/// </summary>
		/// <remarks>
		/// Assumes the type given for the first geometry is the same for all subsequent geometries.
		/// For example, is, if the first Geometry is a Multi-polygon/ Polygon, the subsequent geometies are
		/// Muli-polygon/ polygon and not lines or points.
		/// The dbase file for the corresponding shapefile contains one column called row. It contains 
		/// the row number.
		/// </remarks>
		/// <param name="filename">The filename to write to (minus the .shp extension).</param>
		/// <param name="geometryCollection">The GeometryCollection to write.</param>		
		public void Write(string filename, IGeometryCollection geometryCollection)
		{
			System.IO.FileStream shpStream = new System.IO.FileStream(filename + ".shp", System.IO.FileMode.Create);
			System.IO.FileStream shxStream = new System.IO.FileStream(filename + ".shx", System.IO.FileMode.Create);
			BigEndianBinaryWriter shpBinaryWriter = new BigEndianBinaryWriter(shpStream);
			BigEndianBinaryWriter shxBinaryWriter = new BigEndianBinaryWriter(shxStream);
			
			// assumes
			ShapeHandler handler = Shapefile.GetShapeHandler(Shapefile.GetShapeType(geometryCollection.Geometries[0]));

			IGeometry body;
			int numShapes = geometryCollection.NumGeometries;
			// calc the length of the shp file, so it can put in the header.
			int shpLength = 50;
			for (int i = 0; i < numShapes; i++) 
			{
				body = (IGeometry) geometryCollection.Geometries[i];
				shpLength += 4; // length of header in WORDS
				shpLength += handler.GetLength(body); // length of shape in WORDS
			}

			int shxLength = 50 + (4*numShapes);

			// write the .shp header
			ShapefileHeader shpHeader = new ShapefileHeader();
			shpHeader.FileLength = shpLength;

			// get envelope in external coordinates
            IEnvelope env = geometryCollection.EnvelopeInternal;
			IEnvelope bounds = ShapeHandler.GetEnvelopeExternal(geometryFactory.PrecisionModel,  env);
			shpHeader.Bounds = bounds;

			// assumes Geometry type of the first item will the same for all other items
			// in the collection.
            shpHeader.ShapeType = Shapefile.GetShapeType(geometryCollection.Geometries[0]);
			shpHeader.Write(shpBinaryWriter);

			// write the .shx header
			ShapefileHeader shxHeader = new ShapefileHeader();
			shxHeader.FileLength = shxLength;
			shxHeader.Bounds = shpHeader.Bounds;
			
			// assumes Geometry type of the first item will the same for all other items in the collection.
            shxHeader.ShapeType = Shapefile.GetShapeType(geometryCollection.Geometries[0]);
			shxHeader.Write(shxBinaryWriter);

			// write the individual records.
			int _pos = 50; // header length in WORDS
			for (int i = 0; i < numShapes; i++) 
			{
                body = geometryCollection.Geometries[i];
				int recordLength = handler.GetLength(body);				
				shpBinaryWriter.WriteIntBE(i+1);
				shpBinaryWriter.WriteIntBE(recordLength);
								
				shxBinaryWriter.WriteIntBE(_pos);
				shxBinaryWriter.WriteIntBE(recordLength);
				
				_pos += 4; // length of header in WORDS
				handler.Write(body, shpBinaryWriter,  geometryFactory);
				_pos += recordLength; // length of shape in WORDS
			}

			shxBinaryWriter.Flush();
			shxBinaryWriter.Close();
			shpBinaryWriter.Flush();
			shpBinaryWriter.Close();
			
			// WriteDummyDbf(filename + ".dbf", numShapes);	
		}
Example #5
0
        /// <summary>
        /// Writes a shapefile to disk.
        /// </summary>
        /// <remarks>
        /// Assumes the type given for the first geometry is the same for all subsequent geometries.
        /// For example, is, if the first Geometry is a Multi-polygon/ Polygon, the subsequent geometies are
        /// Muli-polygon/ polygon and not lines or points.
        /// The dbase file for the corresponding shapefile contains one column called row. It contains
        /// the row number.
        /// </remarks>
        /// <param name="filename">The filename to write to (minus the .shp extension).</param>
        /// <param name="geometryCollection">The GeometryCollection to write.</param>
        public void Write(string filename, IGeometryCollection geometryCollection)
        {
            System.IO.FileStream  shpStream       = new System.IO.FileStream(filename + ".shp", System.IO.FileMode.Create);
            System.IO.FileStream  shxStream       = new System.IO.FileStream(filename + ".shx", System.IO.FileMode.Create);
            BigEndianBinaryWriter shpBinaryWriter = new BigEndianBinaryWriter(shpStream);
            BigEndianBinaryWriter shxBinaryWriter = new BigEndianBinaryWriter(shxStream);

            // assumes
            ShapeHandler handler = Shapefile.GetShapeHandler(Shapefile.GetShapeType(geometryCollection.Geometries[0]));

            IGeometry body;
            int       numShapes = geometryCollection.NumGeometries;
            // calc the length of the shp file, so it can put in the header.
            int shpLength = 50;

            for (int i = 0; i < numShapes; i++)
            {
                body       = (IGeometry)geometryCollection.Geometries[i];
                shpLength += 4;                       // length of header in WORDS
                shpLength += handler.GetLength(body); // length of shape in WORDS
            }

            int shxLength = 50 + (4 * numShapes);

            // write the .shp header
            ShapefileHeader shpHeader = new ShapefileHeader();

            shpHeader.FileLength = shpLength;

            // get envelope in external coordinates
            IEnvelope env    = geometryCollection.EnvelopeInternal;
            IEnvelope bounds = ShapeHandler.GetEnvelopeExternal(geometryFactory.PrecisionModel, env);

            shpHeader.Bounds = bounds;

            // assumes Geometry type of the first item will the same for all other items
            // in the collection.
            shpHeader.ShapeType = Shapefile.GetShapeType(geometryCollection.Geometries[0]);
            shpHeader.Write(shpBinaryWriter);

            // write the .shx header
            ShapefileHeader shxHeader = new ShapefileHeader();

            shxHeader.FileLength = shxLength;
            shxHeader.Bounds     = shpHeader.Bounds;

            // assumes Geometry type of the first item will the same for all other items in the collection.
            shxHeader.ShapeType = Shapefile.GetShapeType(geometryCollection.Geometries[0]);
            shxHeader.Write(shxBinaryWriter);

            // write the individual records.
            int _pos = 50;             // header length in WORDS

            for (int i = 0; i < numShapes; i++)
            {
                body = geometryCollection.Geometries[i];
                int recordLength = handler.GetLength(body);
                shpBinaryWriter.WriteIntBE(i + 1);
                shpBinaryWriter.WriteIntBE(recordLength);

                shxBinaryWriter.WriteIntBE(_pos);
                shxBinaryWriter.WriteIntBE(recordLength);

                _pos += 4;                 // length of header in WORDS
                handler.Write(body, shpBinaryWriter, geometryFactory);
                _pos += recordLength;      // length of shape in WORDS
            }

            shxBinaryWriter.Flush();
            shxBinaryWriter.Close();
            shpBinaryWriter.Flush();
            shpBinaryWriter.Close();

            // WriteDummyDbf(filename + ".dbf", numShapes);
        }
Example #6
0
		/// <summary>
		/// Initializes a new instance of the ShapefileDataReader class.
		/// </summary>
		/// <param name="filename">The shapefile to read (minus the .shp extension)</param>
		///<param name="geometryFactory">The GeometryFactory to use.</param>
		public ShapefileDataReader(string filename, IGeometryFactory geometryFactory) 
		{
			if (filename == null)
				throw new ArgumentNullException("filename");
			if (geometryFactory == null)
				throw new ArgumentNullException("geometryFactory");
			_geometryFactory = geometryFactory;
			_open = true;			

			if (filename.ToLower().EndsWith(".shp"))
				filename = filename.ToLower().Replace(".shp",String.Empty);
			
			 _dbfReader = new DbaseFileReader(filename + ".dbf");
			 _shpReader = new ShapefileReader(filename + ".shp", geometryFactory);

			_dbfHeader =  _dbfReader.GetHeader();
			_recordCount = _dbfHeader.NumRecords;			
			
			// copy dbase fields to our own array. Insert into the first position, the shape column
			_dbaseFields = new DbaseFieldDescriptor[_dbfHeader.Fields.Length + 1];
			_dbaseFields[0] = DbaseFieldDescriptor.ShapeField();
			for(int i=0; i < _dbfHeader.Fields.Length; i++)
				_dbaseFields[i+1] = _dbfHeader.Fields[i];
			
			_shpHeader = _shpReader.Header;			
			_dbfEnumerator = _dbfReader.GetEnumerator();
			_shpEnumerator = _shpReader.GetEnumerator();
			_moreRecords = true;
		}