ImportFromWKB Method (IGeometryEngine)

In This Topic

Creates a geometry based on the contents of the input well-known binary buffer.

Syntax

C#
Visual Basic (Declaration)

Geometry ImportFromWKB( 
   WkbImportFlags importFlags,
   byte[] buffer,
   SpatialReference spatialReference
)

Function ImportFromWKB( _
   ByVal importFlags As WkbImportFlags, _
   ByVal buffer() As Byte, _
   ByVal spatialReference As SpatialReference _
) As Geometry

Parameters

importFlags: A combination of WkbImportFlags which determines how the geometry is imported.
buffer: The well-known binary buffer. The buffer must be OGC compliant.
spatialReference: The spatial reference of the output geometry.

Return Value

A Geometry that corresponds to the buffer.

Example

Import and Export Geometries to well-known Binary

// create a polyline
List<Coordinate2D> coords = new List<Coordinate2D>
{
  new Coordinate2D(0, 0),
  new Coordinate2D(0, 1),
  new Coordinate2D(1, 1),
  new Coordinate2D(1, 0)
};

Polyline polyline = PolylineBuilderEx.CreatePolyline(
            coords, SpatialReferences.WGS84);

WkbExportFlags wkbExportFlags = WkbExportFlags.WkbExportDefaults;
WkbImportFlags wkbImportFlags = WkbImportFlags.WkbImportDefaults;

// export and import
byte[] buffer = GeometryEngine.Instance.ExportToWKB(wkbExportFlags, polyline);
Geometry geometry = GeometryEngine.Instance.ImportFromWKB(
               wkbImportFlags, buffer, SpatialReferences.WGS84);
Polyline importPolyline = geometry as Polyline;


// alternatively, determine the size for the buffer
int bufferSize = GeometryEngine.Instance.GetWKBSize(wkbExportFlags, polyline);
buffer = new byte[bufferSize];
// export
bufferSize = GeometryEngine.Instance.ExportToWKB(
                wkbExportFlags, polyline, ref buffer);
// import
importPolyline = GeometryEngine.Instance.ImportFromWKB(
         wkbImportFlags, buffer, SpatialReferences.WGS84) as Polyline;

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

IGeometryEngine Interface
IGeometryEngine Members

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