/// <summary>
/// Initializes a new instance of the <see cref="ShapefileReader">ShapefileReader</see> class with the given parameters.
/// </summary>
/// <param name="filename">The filename of the shape file to read (with .shp).</param>
/// <param name="factory">The <b>GeometryFactory</b> to use when creating Geometry objects.</param>
public ShapefileReader(string filename, GeometryFactory factory)
{
if (filename == null)
{
throw new ArgumentNullException("filename");
}
if (factory == null)
{
throw new ArgumentNullException("geometryFactory");
}
_filename = filename;
Trace.WriteLineIf(Shapefile.TraceSwitch.Enabled,"Reading filename:"+filename);
_geometryFactory = factory;
// 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.
using (BigEndianBinaryReader shpBinaryReader = new BigEndianBinaryReader(File.OpenRead(filename)))
{
_mainHeader = new ShapefileHeader(shpBinaryReader);
}
}
/// <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, GeometryFactory geometryFactory)
{
if (filename == null)
{
throw new ArgumentNullException("filename");
}
if (geometryFactory == null)
{
throw new ArgumentNullException("geometryFactory");
}
_filename = filename;
Trace.WriteLineIf(Shapefile.TraceSwitch.Enabled, "Reading 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, System.IO.FileMode.Open, FileAccess.Read, FileShare.Read);
BigEndianBinaryReader shpBinaryReader = new BigEndianBinaryReader(stream);
_mainHeader = new ShapefileHeader(shpBinaryReader);
shpBinaryReader.Close();
}
public ShapefileIndexReader(string path)
{
_reader = new BigEndianBinaryReader(File.OpenRead(path));
_header = new ShapefileHeader(_reader);
}
/// <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, GeometryFactory geometryFactory)
{
if (filename==null)
{
throw new ArgumentNullException("filename");
}
if (geometryFactory==null)
{
throw new ArgumentNullException("geometryFactory");
}
_filename = filename;
Trace.WriteLineIf(Shapefile.TraceSwitch.Enabled,"Reading 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, System.IO.FileMode.Open, FileAccess.Read, FileShare.Read);
BigEndianBinaryReader shpBinaryReader = new BigEndianBinaryReader(stream);
_mainHeader = new ShapefileHeader(shpBinaryReader);
shpBinaryReader.Close();
}
/// <summary>
/// Writes a shapefile to disk.
/// </summary>
/// <remarks>
/// <para>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.</para>
/// <para>The dbase file for the corresponding shapefile contains one column called row. It contains
/// the row number.</para>
/// </remarks>
/// <param name="filename">The filename to write to (minus the .shp extension).</param>
/// <param name="geometryCollection">The GeometryCollection to write.</param>
/// <param name="geometryFactory">The geometry factory to use.</param>
public static void Write(string filename, GeometryCollection geometryCollection, GeometryFactory geometryFactory)
{
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[0]));
Geometry body;
int numShapes = geometryCollection.GetNumGeometries();
// 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 = geometryCollection[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 envelopse in external coordinates
Envelope env = geometryCollection.GetEnvelopeInternal();
Envelope 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[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[0]);
shxHeader.Write(shxBinaryWriter);
// write the individual records.
int _pos = 50; // header length in WORDS
for (int i = 0; i < numShapes; i++)
{
body = geometryCollection[i];
int recordLength = handler.GetLength(body);
Debug.Assert(Shapefile.GetShapeType(body) != shpHeader.ShapeType, String.Format("Item {0} in the GeometryCollection is not the same Shapetype as Item 0.", i));
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();
Debug.Assert(_pos != shpLength, "File length in header and actual file length do not match.");
//stream.Close();
//Trace.WriteLineIf(Shapefile.TraceSwitch.Enabled,"File length pos:"+_pos*2+" bytes");
//Trace.WriteLineIf(Shapefile.TraceSwitch.Enabled,"File length pos "+_pos+ " words");
WriteDummyDbf(filename + ".dbf", numShapes);
}
/// <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, GeometryFactory 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","");
}
_dbfReader = new DbaseFileReader(filename+".dbf");
_shpReader = new ShapefileReader(filename+".shp", geometryFactory);
_dbfHeader = _dbfReader.GetHeader();
_recordCount = _dbfHeader.NumRecords;
// _wkbWriter = new GeometryWKBWriter(_geometryFactory);
// 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();
//_dbaseFields[1] = DbaseFieldDescriptor.IdField();
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;
}
public ShapefileIndexReader(string path)
{
_reader = new BigEndianBinaryReader(File.OpenRead(path));
_header = new ShapefileHeader(_reader);
}
/// <summary>
/// Writes a shapefile to disk.
/// </summary>
/// <remarks>
/// <para>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.</para>
/// <para>The dbase file for the corresponding shapefile contains one column called row. It contains
/// the row number.</para>
/// </remarks>
/// <param name="filename">The filename to write to (minus the .shp extension).</param>
/// <param name="geometryCollection">The GeometryCollection to write.</param>
/// <param name="geometryFactory">The geometry factory to use.</param>
public static void Write(string filename, GeometryCollection geometryCollection, GeometryFactory geometryFactory)
{
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[0]));
Geometry body;
int numShapes = geometryCollection.GetNumGeometries();
// 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 = geometryCollection[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 envelopse in external coordinates
Envelope env = geometryCollection.GetEnvelopeInternal();
Envelope 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[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[0] );
shxHeader.Write(shxBinaryWriter);
// write the individual records.
int _pos = 50; // header length in WORDS
for (int i = 0; i < numShapes; i++)
{
body = geometryCollection[i];
int recordLength = handler.GetLength(body);
Debug.Assert( Shapefile.GetShapeType(body)!=shpHeader.ShapeType, String.Format("Item {0} in the GeometryCollection is not the same Shapetype as Item 0.",i));
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();
Debug.Assert(_pos!=shpLength,"File length in header and actual file length do not match.");
//stream.Close();
//Trace.WriteLineIf(Shapefile.TraceSwitch.Enabled,"File length pos:"+_pos*2+" bytes");
//Trace.WriteLineIf(Shapefile.TraceSwitch.Enabled,"File length pos "+_pos+ " words");
WriteDummyDbf(filename+".dbf", numShapes);
}
/// <summary>
/// Initializes a new instance of the <see cref="ShapefileWriter">ShapefileWriter</see> class with the specified filename and factory .
/// </summary>
/// <param name="filename">The name of the file to write.</param>
/// <param name="factory">The <b>GeometryFactory</b> to use.</param>
/// <param name="append"></param>
/// <exception cref="ArgumentNullException">The factory is a null reference (Nothing in Visual Basic).</exception>
public ShapefileWriter(string filename, GeometryFactory factory, bool append)
{
if (factory == null)
{
throw new ArgumentNullException("factory");
}
_factory = factory;
string shxFilename = Path.Combine(Path.GetDirectoryName(filename), Path.GetFileNameWithoutExtension(filename) + ".shx");
if (append)
{
if (File.Exists(filename)==false || File.Exists(shxFilename)==false)
{
throw new ArgumentException("Cannot append to a file that does not exist.");
}
ShapefileHeader shpHeader = null;
ShapefileHeader shxHeader = null;
using (Stream stream = File.Open(filename, FileMode.Open))
{
using (BigEndianBinaryReader beBinaryReader = new BigEndianBinaryReader(stream))
{
shpHeader = new ShapefileHeader(beBinaryReader);
}
}
using (Stream stream = File.Open(shxFilename, FileMode.Open))
{
using (BigEndianBinaryReader beBinaryReader = new BigEndianBinaryReader(stream))
{
shxHeader = new ShapefileHeader(beBinaryReader);
}
}
this._type = shpHeader.ShapeType;
this._shpLength = shpHeader.FileLength;
this._bounds = shpHeader.Bounds;
this._count = (shxHeader.FileLength-50)/4;
_shpWriter = new BigEndianBinaryWriter(File.Open(filename, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite));
_shxWriter = new BigEndianBinaryWriter(File.Open(shxFilename, FileMode.Open,FileAccess.ReadWrite, FileShare.ReadWrite));
// Write dummy headers as place holders
this.WriteHeader(_shpWriter,0);
this.WriteHeader(_shxWriter,0);
_shpWriter.BaseStream.Position = _shpWriter.BaseStream.Length;
_shxWriter.BaseStream.Position = _shxWriter.BaseStream.Length;
}
else
{
_shpWriter = new BigEndianBinaryWriter(File.Open(filename, FileMode.CreateNew));
_shxWriter = new BigEndianBinaryWriter(File.Open(shxFilename, FileMode.CreateNew));
// Write dummy headers as place holders
this.WriteHeader(_shpWriter,0);
this.WriteHeader(_shxWriter,0);
}
}
public void WriteHeader(BigEndianBinaryWriter writer, int length)
{
ShapefileHeader header = new ShapefileHeader();
// Go to the start of the stream (if we're not already there)
writer.BaseStream.Position = 0;
// Set current header properties
header.Bounds = _bounds;
header.FileLength = length;
header.ShapeType = _type;
header.Write(writer);
}
