ArcGIS Engine 几何对象和WKB的转换

using System;

using System.Collections.Generic;

using System.Text;

using GisSharpBlog.NetTopologySuite.IO;

using ESRI.ArcGIS.Geometry;



namespace Utils

{

    /// <summary>

    /// This class is used to convert a GeoAPI Geometry to ESRI and vice-versa.

    /// It can also convert a ESRI Geometry to WKB/WKT and vice-versa.

    /// </summary>

    public static class Converters

    {



        public static byte[] ConvertGeometryToWKB(IGeometry geometry)

        {

            IWkb wkb = geometry as IWkb;

            ITopologicalOperator oper = geometry as ITopologicalOperator;

            oper.Simplify();



            IGeometryFactory3 factory = new GeometryEnvironment() as IGeometryFactory3;

            byte[] b = factory.CreateWkbVariantFromGeometry(geometry) as byte[];

            return b;

        }





        public static byte[] ConvertWKTToWKB(string wkt)

        {

            WKBWriter writer = new WKBWriter();

            WKTReader reader = new WKTReader();

            return writer.Write(reader.Read(wkt));

        }



        public static string ConvertWKBToWKT(byte[] wkb)

        {

            WKTWriter writer = new WKTWriter();

            WKBReader reader = new WKBReader();

            return writer.Write(reader.Read(wkb));

        }



        public static string ConvertGeometryToWKT(IGeometry geometry)

        {

            byte[] b = ConvertGeometryToWKB(geometry);

            WKBReader reader = new WKBReader();

            GeoAPI.Geometries.IGeometry g = reader.Read(b);

            WKTWriter writer = new WKTWriter();

            return writer.Write(g);

        }



        public static IGeometry ConvertWKTToGeometry(string wkt)

        {

            byte[] wkb = ConvertWKTToWKB(wkt);

            return ConvertWKBToGeometry(wkb);

        }



        public static IGeometry ConvertWKBToGeometry(byte[] wkb)

        {

            IGeometry geom;

            int countin = wkb.GetLength(0);

            IGeometryFactory3 factory = new GeometryEnvironment() as IGeometryFactory3;

            factory.CreateGeometryFromWkbVariant(wkb, out geom, out countin);

            return geom;

        }





        public static IGeometry ConvertGeoAPIToESRI(GeoAPI.Geometries.IGeometry geometry)

        {

            WKBWriter writer = new WKBWriter();

            byte[] bytes = writer.Write(geometry);

            return ConvertWKBToGeometry(bytes);

        }



        public static GeoAPI.Geometries.IGeometry ConvertESRIToGeoAPI(IGeometry geometry)

        {

            byte[] wkb = ConvertGeometryToWKB(geometry);

            WKBReader reader = new WKBReader();

            return reader.Read(wkb);

        }

    }

}