ArcGIS Engine IGeometry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);
        }
    }
}

// GisSharpBlog.NetTopologySuite.IO 可以使用NuGet包管理器下载，传送门

转载链接：http://www.cnblogs.com/zuiyirenjian/p/3410141.html
ArcMap中使用ArcPy实现Geometry与WKT的相互转换：http://blog.csdn.net/linghe301/article/details/29554257（此种方法的缺点，如果线或者面比较复杂，4000的字符串长度根本不够，赋值会出错）

转载自：https://blog.csdn.net/yh0503/article/details/71158193