/// <summary>
/// Initializes a new instance of the <see cref="ShapefileHeader">ShapefileHeader</see> class with values read in from the stream.
/// </summary>
/// <remarks>Reads the header information from the stream.</remarks>
/// <param name="reader">BigEndianBinaryReader stream to the shapefile.</param>
public ShapefileHeader(BigEndianBinaryReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
_fileCode = reader.ReadIntBE();
if (_fileCode!=Shapefile.ShapefileId)
{
throw new ShapefileException("The first four bytes of this file indicate this is not a shape file.");
}
// Skip 5 unsed bytes
for (int i = 0; i < 5; i++)
{
reader.ReadIntBE();
}
_fileLength = reader.ReadIntBE();
_version = reader.ReadInt32();
Debug.Assert(_version == 1000, "Shapefile version", String.Format(System.Globalization.CultureInfo.InvariantCulture, "Expecting only one version (1000), but got {0}", _version));
int shapeType = reader.ReadInt32();
if (Enum.IsDefined(typeof(ShapeType), shapeType))
{
_shapeType = (ShapeType)shapeType;
}
else
{
throw new ShapefileException("Invalid shape type");
}
// Read in and store the bounding box
double[] coords = new double[4];
for (int i = 0; i < coords.Length; i++)
{
coords[i] = reader.ReadDouble();
}
_bounds = new Envelope(coords[0], coords[2], coords[1], coords[3]);
// skip z and m bounding boxes.
for (int i = 0; i < 4; i++)
{
reader.ReadDouble();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ShapefileHeader">ShapefileHeader</see> class with values read in from the stream.
/// </summary>
/// <remarks>Reads the header information from the stream.</remarks>
/// <param name="reader">BigEndianBinaryReader stream to the shapefile.</param>
public ShapefileHeader(BigEndianBinaryReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
_fileCode = reader.ReadIntBE();
if (_fileCode != Shapefile.ShapefileId)
{
throw new ShapefileException("The first four bytes of this file indicate this is not a shape file.");
}
// Skip 5 unsed bytes
for (int i = 0; i < 5; i++)
{
reader.ReadIntBE();
}
_fileLength = reader.ReadIntBE();
_version = reader.ReadInt32();
Debug.Assert(_version == 1000, "Shapefile version", String.Format(System.Globalization.CultureInfo.InvariantCulture, "Expecting only one version (1000), but got {0}", _version));
int shapeType = reader.ReadInt32();
if (Enum.IsDefined(typeof(ShapeType), shapeType))
{
_shapeType = (ShapeType)shapeType;
}
else
{
throw new ShapefileException("Invalid shape type");
}
// Read in and store the bounding box
double[] coords = new double[4];
for (int i = 0; i < coords.Length; i++)
{
coords[i] = reader.ReadDouble();
}
_bounds = new Envelope(coords[0], coords[2], coords[1], coords[3]);
// skip z and m bounding boxes.
for (int i = 0; i < 4; i++)
{
reader.ReadDouble();
}
}
public bool Read()
{
if (_reader.PeekChar() != -1)
{
_currentOffset = _reader.ReadIntBE();
_currentLength = _reader.ReadIntBE();
return(true);
}
else
{
return(false);
}
}
public bool MoveNext()
{
if (_shpBinaryReader.PeekChar() != -1)
{
int recordNumber = _shpBinaryReader.ReadIntBE();
int contentLength = _shpBinaryReader.ReadIntBE();
if (Shapefile.TraceSwitch.Enabled)
{
Trace.WriteLine("Record number :" + recordNumber);
Trace.WriteLine("contentLength :" + contentLength);
}
_geometry = _handler.Read(_shpBinaryReader, _parent._geometryFactory);
return(true);
}
else
{
// reached end of file, so close the reader.
_shpBinaryReader.Close();
return(false);
}
}
/// <summary>
/// Initializes a new instance of the ShapefileHeader class with values read in from the stream.
/// </summary>
/// <remarks>Reads the header information from the stream.</remarks>
/// <param name="shpBinaryReader">BigEndianBinaryReader stream to the shapefile.</param>
public ShapefileHeader(BigEndianBinaryReader shpBinaryReader)
{
if (shpBinaryReader == null)
{
throw new ArgumentNullException("shpBinaryReader");
}
_fileCode = shpBinaryReader.ReadIntBE();
if (_fileCode != Shapefile.ShapefileId)
{
throw new ShapefileException("The first four bytes of this file indicate this is not a shape file.");
}
// skip 5 unsed bytes
shpBinaryReader.ReadIntBE();
shpBinaryReader.ReadIntBE();
shpBinaryReader.ReadIntBE();
shpBinaryReader.ReadIntBE();
shpBinaryReader.ReadIntBE();
_fileLength = shpBinaryReader.ReadIntBE();
_version = shpBinaryReader.ReadInt32();
Debug.Assert(_version == 1000, "Shapefile version", String.Format("Expecting only one version (1000), but got {0}", _version));
int shapeType = shpBinaryReader.ReadInt32();
_shapeType = (ShapeType)Enum.Parse(typeof(ShapeType), shapeType.ToString());
//read in and store the bounding box
double[] coords = new double[4];
for (int i = 0; i < 4; i++)
{
coords[i] = shpBinaryReader.ReadDouble();
}
_bounds = new Envelope(coords[0], coords[2], coords[1], coords[3]);
// skip z and m bounding boxes.
for (int i = 0; i < 4; i++)
{
shpBinaryReader.ReadDouble();
}
}
/// <summary>
/// Initializes a new instance of the ShapefileHeader class with values read in from the stream.
/// </summary>
/// <remarks>Reads the header information from the stream.</remarks>
/// <param name="shpBinaryReader">BigEndianBinaryReader stream to the shapefile.</param>
public ShapefileHeader(BigEndianBinaryReader shpBinaryReader)
{
if (shpBinaryReader==null)
{
throw new ArgumentNullException("shpBinaryReader");
}
_fileCode = shpBinaryReader.ReadIntBE();
if (_fileCode!=Shapefile.ShapefileId)
{
throw new ShapefileException("The first four bytes of this file indicate this is not a shape file.");
}
// skip 5 unsed bytes
shpBinaryReader.ReadIntBE();
shpBinaryReader.ReadIntBE();
shpBinaryReader.ReadIntBE();
shpBinaryReader.ReadIntBE();
shpBinaryReader.ReadIntBE();
_fileLength = shpBinaryReader.ReadIntBE();
_version = shpBinaryReader.ReadInt32();
Debug.Assert(_version==1000, "Shapefile version", String.Format("Expecting only one version (1000), but got {0}",_version));
int shapeType = shpBinaryReader.ReadInt32();
_shapeType = (ShapeType)Enum.Parse(typeof(ShapeType),shapeType.ToString());
//read in and store the bounding box
double[] coords = new double[4];
for (int i = 0; i < 4; i++)
{
coords[i]=shpBinaryReader.ReadDouble();
}
_bounds = new Envelope(coords[0], coords[2], coords[1], coords[3]);
// skip z and m bounding boxes.
for (int i=0; i < 4; i++)
{
shpBinaryReader.ReadDouble();
}
}
private void Initialize()
{
// Cache the .dbf header
_dbfHeader = new DbaseFileHeader();
using (BinaryReader dbfReader = new BinaryReader(File.OpenRead(Path.Combine(Path.GetDirectoryName(_path), Path.GetFileNameWithoutExtension(_path) + ".dbf"))))
{
_dbfHeader.ReadHeader(dbfReader);
_dbfHeaderOffset = dbfReader.BaseStream.Position;
}
// Need to make one pass over the geometries and pull out the bounding boxes
_spatialIndex = new com.vividsolutions.jts.index.strtree.STRtree();
_extents = new Envelope();
using (BigEndianBinaryReader shpReader = new BigEndianBinaryReader(File.OpenRead(_path)))
using (ShapefileIndexReader shxReader = new ShapefileIndexReader(Path.Combine(Path.GetDirectoryName(_path), Path.GetFileNameWithoutExtension(_path) + ".shx")))
{
// Get the shape type
_type = new ShapefileHeader(shpReader).ShapeType;
while (shxReader.Read())
{
int offset = shxReader.GetOffest();
int length = shxReader.GetLength();
// Move to the start of geometry
shpReader.BaseStream.Position = offset * 2;
double xMin;
double yMin;
double xMax;
double yMax;
int recordNumber = shpReader.ReadIntBE();
int contentLength = shpReader.ReadIntBE();
// Read shape type
int type = shpReader.ReadInt32();
if (type != 1)
{
xMin = shpReader.ReadDouble();
yMin = shpReader.ReadDouble();
xMax = shpReader.ReadDouble();
yMax = shpReader.ReadDouble();
}
else
{
// Point - read x and y
xMin = shpReader.ReadDouble();
yMin = shpReader.ReadDouble();
xMax = yMin;
yMax = yMin;
}
// Build the envelope
Envelope extents = new Envelope(xMin, xMax, yMin, yMax);
// Add to total extents
_extents.expandToInclude(extents);
// Insert the index of the record into the spatial index
_spatialIndex.insert(extents, new ShapefileRecordPointer(recordNumber, offset * 2, contentLength, (int)_dbfHeaderOffset + (_dbfHeader.RecordLength * (recordNumber - 1))));
}
// Build the index once
_spatialIndex.build();
}
}
private void Initialize()
{
// Cache the .dbf header
_dbfHeader = new DbaseFileHeader();
using (BinaryReader dbfReader = new BinaryReader(File.OpenRead(Path.Combine(Path.GetDirectoryName(_path), Path.GetFileNameWithoutExtension(_path) + ".dbf"))))
{
_dbfHeader.ReadHeader(dbfReader);
_dbfHeaderOffset = dbfReader.BaseStream.Position;
}
// Need to make one pass over the geometries and pull out the bounding boxes
_spatialIndex = new com.vividsolutions.jts.index.strtree.STRtree();
_extents = new Envelope();
using (BigEndianBinaryReader shpReader = new BigEndianBinaryReader(File.OpenRead(_path)))
using (ShapefileIndexReader shxReader = new ShapefileIndexReader(Path.Combine(Path.GetDirectoryName(_path), Path.GetFileNameWithoutExtension(_path) + ".shx")))
{
// Get the shape type
_type = new ShapefileHeader(shpReader).ShapeType;
while (shxReader.Read())
{
int offset = shxReader.GetOffest();
int length = shxReader.GetLength();
// Move to the start of geometry
shpReader.BaseStream.Position = offset * 2;
double xMin;
double yMin;
double xMax;
double yMax;
int recordNumber = shpReader.ReadIntBE();
int contentLength = shpReader.ReadIntBE();
// Read shape type
int type = shpReader.ReadInt32();
if (type != 1)
{
xMin = shpReader.ReadDouble();
yMin = shpReader.ReadDouble();
xMax = shpReader.ReadDouble();
yMax = shpReader.ReadDouble();
}
else
{
// Point - read x and y
xMin = shpReader.ReadDouble();
yMin = shpReader.ReadDouble();
xMax = yMin;
yMax = yMin;
}
// Build the envelope
Envelope extents = new Envelope(xMin, xMax, yMin, yMax);
// Add to total extents
_extents.expandToInclude(extents);
// Insert the index of the record into the spatial index
_spatialIndex.insert(extents, new ShapefileRecordPointer(recordNumber, offset * 2, contentLength, (int)_dbfHeaderOffset + (_dbfHeader.RecordLength * (recordNumber - 1))));
}
// Build the index once
_spatialIndex.build();
}
}
