/// <summary>
/// Writes the geometry information from the specified IFeatureLayer to the file
/// </summary>
/// <param name="filename">A filename</param>
/// <param name="Layer">An IFeatureLayer to save</param>
public virtual void Write(string filename, IFeatureSet Layer)
{
if (Layer == null) return;
if (Layer.Features == null) return;
if (Layer.Features.Count == 0) return;
string rootname, shpFile, shxFile;
rootname = System.IO.Path.GetDirectoryName(filename) + "\\" + System.IO.Path.GetFileNameWithoutExtension(filename);
shpFile = rootname + ".shp";
shxFile = rootname + ".shx";
System.IO.FileStream shpStream = new System.IO.FileStream(shpFile, System.IO.FileMode.Create);
System.IO.FileStream shxStream = new System.IO.FileStream(shxFile, System.IO.FileMode.Create);
BigEndianBinaryWriter shpBinaryWriter = new BigEndianBinaryWriter(shpStream);
BigEndianBinaryWriter shxBinaryWriter = new BigEndianBinaryWriter(shxStream);
// assumes
// ShapeHandler handler = Shapefile.GetShapeHandler(Shapefile.GetShapeType(geometryCollection.Geometries[0]));
ShapeHandler handler = null;
switch (Layer.Features[0].FeatureType)
{
case FeatureTypes.Unspecified: return;
case FeatureTypes.Line: handler = new MultiLineHandler();
break;
case FeatureTypes.Point: handler = new PointHandler();
break;
case FeatureTypes.Polygon: handler = new PolygonHandler();
break;
}
IBasicGeometry body;
int numShapes = Layer.Features.Count;
// 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 = Layer.Features[i].BasicGeometry;
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 ShapeHeader = new ShapefileHeader();
ShapeHeader.FileLength = shpLength;
// get envelope in external coordinates
IEnvelope env = Layer.Envelope;
//IEnvelope bounds = ShapeHandler.GetEnvelopeExternal(new PrecisionModel(geometryFactory.PrecisionModel), env);
ShapeHeader.Bounds = env;
// write the .shx header
ShapefileHeader shxHeader = new ShapefileHeader();
shxHeader.FileLength = shxLength;
shxHeader.Bounds = ShapeHeader.Bounds;
// assumes Geometry type of the first item will the same for all other items
// in the collection.
switch(Layer.FeatureType)
{
case FeatureTypes.Polygon:
ShapeHeader.ShapeType = ShapeGeometryTypes.Polygon;
shxHeader.ShapeType = ShapeGeometryTypes.Polygon;
break;
case FeatureTypes.Point:
ShapeHeader.ShapeType = ShapeGeometryTypes.Point;
shxHeader.ShapeType = ShapeGeometryTypes.Point;
break;
case FeatureTypes.Line:
ShapeHeader.ShapeType = ShapeGeometryTypes.LineString;
shxHeader.ShapeType = ShapeGeometryTypes.LineString;
break;
}
ShapeHeader.Write(shpBinaryWriter);
// assumes Geometry type of the first item will the same for all other items in the collection.
shxHeader.Write(shxBinaryWriter);
// write the individual records.
int _pos = 50; // header length in WORDS
for (int i = 0; i < numShapes; i++)
{
body = Layer.Features[i].BasicGeometry;
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();
}
/// <summary>
/// Writes an entire shapefile to disk in one call using a geometryCollection.
/// </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 virtual void Write(string filename, GeometryCollection 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 = 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 ShapeHeader = new ShapefileHeader();
ShapeHeader.FileLength = shpLength;
// get envelope in external coordinates
IEnvelope env = geometryCollection.EnvelopeInternal;
IEnvelope bounds = ShapeHandler.GetEnvelopeExternal(new PrecisionModel(geometryFactory.PrecisionModel), env);
ShapeHeader.Bounds = bounds;
// assumes Geometry type of the first item will the same for all other items
// in the collection.
ShapeHeader.ShapeType = Shapefile.GetShapeType(geometryCollection.Geometries[0]);
ShapeHeader.Write(shpBinaryWriter);
// write the .shx header
ShapefileHeader shxHeader = new ShapefileHeader();
shxHeader.FileLength = shxLength;
shxHeader.Bounds = ShapeHeader.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);
}
/// <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(IGeometryCollection geometryCollection)
{
//FileStream shpStream = new FileStream(filename + ".shp", FileMode.Create);
//FileStream shxStream = new FileStream(filename + ".shx", FileMode.Create);
shpStream = new MemoryStream();
shxStream = new MemoryStream();
BigEndianBinaryWriter shpBinaryWriter = new BigEndianBinaryWriter(shpStream);
BigEndianBinaryWriter shxBinaryWriter = new BigEndianBinaryWriter(shxStream);
// assumes
ShapeHandler handler = Shapefile.GetShapeHandler(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.ComputeRequiredLengthInWords(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
Envelope env = geometryCollection.EnvelopeInternal as Envelope;
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 = 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 = 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.ComputeRequiredLengthInWords(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();
//shxStream.Seek(0, SeekOrigin.Begin);
////shxBinaryWriter.Close();
shpBinaryWriter.Flush();
//shpStream.Seek(0, SeekOrigin.Begin);
//shpBinaryWriter.Close();
// WriteDummyDbf(filename + ".dbf", numShapes);
}
