/// <summary>
/// Read a shapefile record.
/// </summary>
/// <param name="stream">Input stream.</param>
public ShapeFileRecord ReadShapeFileRecord(Stream stream)
{
ShapeFileRecord record = new ShapeFileRecord();
// Record Header.
record.RecordNumber = ShapeFile.ReadInt32_BE(stream);
record.ContentLength = ShapeFile.ReadInt32_BE(stream);
// Shape Type.
record.ShapeType = ShapeFile.ReadInt32_LE(stream);
// Read the shape geometry, depending on its type.
switch (record.ShapeType)
{
case ( int )ShapeType.NullShape:
// Do nothing.
break;
case ( int )ShapeType.Point:
ShapeFile.ReadPoint(stream, record);
break;
case ( int )ShapeType.PolyLine:
// PolyLine has exact same structure as Polygon in shapefile.
ShapeFile.ReadPolygon(stream, record);
break;
case ( int )ShapeType.Polygon:
ShapeFile.ReadPolygon(stream, record);
break;
case ( int )ShapeType.Multipoint:
ShapeFile.ReadMultipoint(stream, record);
break;
default:
{
string msg = String.Format(System.Globalization.CultureInfo.InvariantCulture, "ShapeType {0} is not supported.", ( int )record.ShapeType);
throw new NotSupportedException(msg);
}
}
// Add the record to our internal list.
this.records.Add(record);
return(record);
}
/// <summary>
/// Read a shapefile MultiPoint record.
/// </summary>
/// <param name="stream">Input stream.</param>
/// <param name="record">Shapefile record to be updated.</param>
private static void ReadMultipoint(Stream stream, ShapeFileRecord record)
{
// Bounding Box.
record.XMin = ShapeFile.ReadDouble64_LE(stream);
record.YMin = ShapeFile.ReadDouble64_LE(stream);
record.XMax = ShapeFile.ReadDouble64_LE(stream);
record.YMax = ShapeFile.ReadDouble64_LE(stream);
// Num Points.
int numPoints = ShapeFile.ReadInt32_LE(stream);
// Points.
for (int i = 0; i < numPoints; i++)
{
PointF p = new PointF();
p.X = (float)ShapeFile.ReadDouble64_LE(stream);
p.Y = (float)ShapeFile.ReadDouble64_LE(stream);
record.Points.Add(p);
}
}
/// <summary>
/// Read a shapefile Polygon record.
/// </summary>
/// <param name="stream">Input stream.</param>
/// <param name="record">Shapefile record to be updated.</param>
private static void ReadPolygon( Stream stream, ShapeFileRecord record )
{
// Bounding Box.
record.XMin = ShapeFile.ReadDouble64_LE( stream );
record.YMin = ShapeFile.ReadDouble64_LE( stream );
record.XMax = ShapeFile.ReadDouble64_LE( stream );
record.YMax = ShapeFile.ReadDouble64_LE( stream );
// Num Parts and Points.
int numParts = ShapeFile.ReadInt32_LE( stream );
int numPoints = ShapeFile.ReadInt32_LE( stream );
// Parts.
for( int i = 0; i < numParts; i++ )
{
record.Parts.Add( ShapeFile.ReadInt32_LE( stream ) );
}
// Points.
for( int i = 0; i < numPoints; i++ )
{
Point p = new Point();
p.X = ShapeFile.ReadDouble64_LE( stream );
p.Y = ShapeFile.ReadDouble64_LE( stream );
record.Points.Add( p );
}
}
/// <summary>
/// Read a shapefile Point record.
/// </summary>
/// <param name="stream">Input stream.</param>
/// <param name="record">Shapefile record to be updated.</param>
private static void ReadPoint( Stream stream, ShapeFileRecord record )
{
// Points - add a single point.
Point p = new System.Windows.Point();
p.X = ShapeFile.ReadDouble64_LE( stream );
p.Y = ShapeFile.ReadDouble64_LE( stream );
record.Points.Add( p );
// Bounding Box.
record.XMin = p.X;
record.YMin = p.Y;
record.XMax = record.XMin;
record.YMax = record.YMin;
}
/// <summary>
/// Read a shapefile record.
/// </summary>
/// <param name="stream">Input stream.</param>
public ShapeFileRecord ReadShapeFileRecord( Stream stream )
{
ShapeFileRecord record = new ShapeFileRecord();
// Record Header.
record.RecordNumber = ShapeFile.ReadInt32_BE( stream );
record.ContentLength = ShapeFile.ReadInt32_BE( stream );
// Shape Type.
record.ShapeType = ShapeFile.ReadInt32_LE( stream );
// Read the shape geometry, depending on its type.
switch( record.ShapeType )
{
case ( int ) ShapeType.NullShape:
// Do nothing.
break;
case ( int ) ShapeType.Point:
ShapeFile.ReadPoint( stream, record );
break;
case ( int ) ShapeType.PolyLine:
// PolyLine has exact same structure as Polygon in shapefile.
ShapeFile.ReadPolygon( stream, record );
break;
case ( int ) ShapeType.Polygon:
ShapeFile.ReadPolygon( stream, record );
break;
case ( int ) ShapeType.Multipoint:
ShapeFile.ReadMultipoint( stream, record );
break;
default:
{
string msg = String.Format( System.Globalization.CultureInfo.InvariantCulture, "ShapeType {0} is not supported.", ( int ) record.ShapeType );
throw new NotSupportedException( msg );
}
}
// Add the record to our internal list.
this.records.Add( record );
return record;
}
