public ShapeFileHeader(ShapeFileType shapeFileType)
{
fileCode = 9994;
version = fileVersionNumber;
this.shapeFileType = shapeFileType;
boundingBox = new ShapeFileBoundingBox();
}
public static ShapeFileBoundingBox GetHeaderBoundingBox(Stream stream)
{
stream.Seek(boundingBoxStartPostion, SeekOrigin.Begin);
ShapeFileBoundingBox returnBoundingBox = new ShapeFileBoundingBox();
BinaryReader br = new BinaryReader(stream);
returnBoundingBox.minX = br.ReadDouble();
returnBoundingBox.minY = br.ReadDouble();
returnBoundingBox.maxX = br.ReadDouble();
returnBoundingBox.maxY = br.ReadDouble();
return(returnBoundingBox);
}
/// <summary>
/// merge the input Bounding Box, store the result
/// </summary>
/// <param name="targetBox">the input BoundingBox to be merged</param>
public void MergeBoundingBox(ShapeFileBoundingBox targetBox)
{
if (minX == 0 && minY == 0 && maxX == 0 && maxY == 0)
{
minX = targetBox.minX;
maxX = targetBox.maxX;
minY = targetBox.minY;
maxY = targetBox.maxY;
}
else
{
minX = targetBox.MinX < minX ? targetBox.MinX : minX;
maxX = targetBox.MaxX > maxX ? targetBox.MaxX : maxX;
minY = targetBox.MinY < minY ? targetBox.MinY : minY;
maxY = targetBox.MaxY > maxY ? targetBox.MaxY : maxY;
}
}
public static ShapeFileHeader GetHeaderFromStream(Stream stream)
{
ShapeFileHeader returnHeader = new ShapeFileHeader();
stream.Seek(0, SeekOrigin.Begin);
returnHeader.fileCode = IOUtil.ReadIntFromStream(stream, WkbByteOrder.BigEndian);
stream.Seek(fileLengthInfoPosition, SeekOrigin.Begin);
returnHeader.fileLength = IOUtil.ReadIntFromStream(stream, WkbByteOrder.BigEndian);
returnHeader.version = IOUtil.ReadIntFromStream(stream, WkbByteOrder.LittleEndian);
returnHeader.shapeFileType = ConvertIntToShapeFileType(IOUtil.ReadIntFromStream(stream, WkbByteOrder.LittleEndian));
returnHeader.boundingBox = ShapeFileBoundingBox.GetHeaderBoundingBox(stream);
return(returnHeader);
}
