/// <summary>
/// Read the file header of the shapefile.
/// </summary>
/// <param name="stream">Input stream.</param>
public void ReadShapeFileHeader(Stream stream)
{
// File Code.
this.fileHeader.FileCode = ShapeFile.ReadInt32_BE(stream);
if (this.fileHeader.FileCode != ShapeFile.expectedFileCode)
{
string msg = String.Format(System.Globalization.CultureInfo.InvariantCulture, "Invalid FileCode encountered. Expecting {0}.", ShapeFile.expectedFileCode);
throw new ArgumentException(msg);
}
// 5 unused values.
ShapeFile.ReadInt32_BE(stream);
ShapeFile.ReadInt32_BE(stream);
ShapeFile.ReadInt32_BE(stream);
ShapeFile.ReadInt32_BE(stream);
ShapeFile.ReadInt32_BE(stream);
// File Length.
this.fileHeader.FileLength = ShapeFile.ReadInt32_BE(stream);
// Version.
this.fileHeader.Version = ShapeFile.ReadInt32_LE(stream);
// Shape Type.
this.fileHeader.ShapeType = ShapeFile.ReadInt32_LE(stream);
// Bounding Box.
this.fileHeader.XMin = ShapeFile.ReadDouble64_LE(stream);
this.fileHeader.YMin = ShapeFile.ReadDouble64_LE(stream);
this.fileHeader.XMax = ShapeFile.ReadDouble64_LE(stream);
this.fileHeader.YMax = ShapeFile.ReadDouble64_LE(stream);
// Adjust the bounding box in case it is too small.
if (Math.Abs(this.fileHeader.XMax - this.fileHeader.XMin) < 1)
{
this.fileHeader.XMin -= 5;
this.fileHeader.XMax += 5;
}
if (Math.Abs(this.fileHeader.YMax - this.fileHeader.YMin) < 1)
{
this.fileHeader.YMin -= 5;
this.fileHeader.YMax += 5;
}
// Skip the rest of the file header.
stream.Seek(100, SeekOrigin.Begin);
}
/// <summary>
/// Read a shapefile record.
/// </summary>
/// <param name="stream">Input stream.</param>
public ShapeFileRecord ReadShapeFileRecord(Stream stream)
{
ShapeFileRecord record = new ShapeFileRecord();
// MainWindow mw = new MainWindow();
// 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 ArgumentException(msg);
}
}
// Add the record to our internal list.
// Check if list Points is empty or not.
if (record.Points.Count < 1)
{
return(record);
}
else
{
//part polygon record
//Check if list of int "Parts" is superior to 1.
if (record.Parts.Count > 1)
{
for (int a = 0; a < record.Parts.Count; a++)
{
ShapeFileRecord record1 = new ShapeFileRecord();
if (a + 1 < record.Parts.Count)
{
for (int b = record.Parts[a]; b < record.Parts[a + 1]; b++)
{
Vector2 p = new Vector2();
p.x = record.Points[b].x;
p.y = record.Points[b].y;
// p.z = record.Points[b].z;
record1.Points.Add(p);
}
record1.ShapeType = 5;
record1.Parts.Add(record.Parts[a]);
this.Myrecords.Add(record1);
}
else
{
for (int b = record.Parts[a]; b < record.Points.Count; b++)
{
Vector2 p = new Vector2();
p.x = record.Points[b].x;
p.y = record.Points[b].y;
// p.z = record.Points[b].z;
record1.Points.Add(p);
}
record1.ShapeType = 5;
record1.Parts.Add(0);
this.Myrecords.Add(record1);
}
}
this.records.Add(record);
return(record);
}
this.records.Add(record);
this.Myrecords.Add(record);
return(record);
}
}