/// <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); }