/// <summary>
/// Writes shapes.
/// </summary>
/// <param name="filename">The string value defining shape file name without .shp extension</param>
/// <param name="geometryCollection"> MapAround.Geometry.GeometryCollection instance containing
/// the geometries to write to shape file</param>
public void WriteShapes(string filename, GeometryCollection geometryCollection)
{
if(geometryCollection.HasDifferentTypeInstances)
throw new ArgumentException("Geometries in the shape file should be the instances of the same type.", "geometryCollection");
using (FileStream shpStream = new FileStream(filename + ".shp", FileMode.Create))
{
using (FileStream shxStream = new FileStream(filename + ".shx", FileMode.Create))
{
BigEndianBinaryWriter shpBinaryWriter = new BigEndianBinaryWriter(shpStream);//, Encoding.ASCII);
BigEndianBinaryWriter shxBinaryWriter = new BigEndianBinaryWriter(shxStream);//, Encoding.ASCII);
// body type and a handler
Handlers.ShapeHandler handler = ShapeFile.GetShapeHandler(ShapeFile.GetShapeType(geometryCollection[0]));//.Geometries[0]));
int numShapes = geometryCollection.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++)
{
IGeometry body = (IGeometry)geometryCollection[i];//.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
BoundingRectangle bounds = geometryCollection.GetBoundingRectangle();
shpHeader.SetBounds(bounds);
shpHeader.FileCode = 9994;
shpHeader.ShapeType = (int)ShapeFile.GetShapeType(geometryCollection[0]);//.Geometries[0]);
shpHeader.Write(shpBinaryWriter, ShapeFile.GetShapeType(geometryCollection[0]));
// write the .shx header
ShapeFileHeader shxHeader = new ShapeFileHeader();
shxHeader.FileLength = shxLength;
shxHeader.SetBounds(shpHeader);//.Bounds = shpHeader.Bounds;
// assumes Geometry type of the first item will the same for all other items in the collection.
shxHeader.FileCode = 9994;
shxHeader.ShapeType = (int)ShapeFile.GetShapeType(geometryCollection[0]);
shxHeader.Write(shxBinaryWriter, ShapeFile.GetShapeType(geometryCollection[0]));
// write the individual records.
int _pos = 50; // header length in WORDS
for (int i = 0; i < numShapes; i++)
{
IGeometry body = geometryCollection[i];//.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();
}
}
}
/// <summary>
/// Writes this header to the stream.
/// </summary>
/// <param name="file">A System.IO.BinaryWriter instance to write the header</param>
/// <param name="ShapeType">Shape type</param>
internal void Write(BigEndianBinaryWriter file, ShapeType ShapeType)
{
if (file == null)
throw new ArgumentNullException("file");
if (this.FileLength == -1)
throw new InvalidOperationException("The header properties need to be set before writing the header record.");
int pos = 0;
file.WriteIntBE(this.FileCode);
pos += 4;
for (int i = 0; i < 5; i++)
{
file.WriteIntBE(0);//Skip unused part of header
pos += 4;
}
file.WriteIntBE(this.FileLength);
pos += 4;
file.Write(this.Version);
pos += 4;
file.Write(int.Parse(Enum.Format(typeof(ShapeType), ShapeType, "d")));
pos += 4;
// Write the bounding box
file.Write(this.MinX);
file.Write(this.MinY);
file.Write(this.MaxX);
file.Write(this.MaxY);
pos += 8 * 4;
// Skip remaining unused bytes
for (int i = 0; i < 4; i++)
{
file.Write(0.0); // Skip unused part of header
pos += 8;
}
}
