GDAL 生成shp文件

附件：http://pan.baidu.com/s/1i3GPwrV（C#版GDAL接口.dll）

示例程序： http://pan.baidu.com/s/1jpIKQ  （程序是在vs2008 x86下編寫的，其中WKT數據是從數據庫中獲取的，程序中的界面沒有任何的作用，直接點擊執行即可）

 1、環境配置

   　　添加引用和頭文件就可以使用了。

 

2、代碼示例，c#調用gdal生產shp文件。

   static void WriteVectorFileShp(String strVectorFile, String wkt, double area)  //創建算法生產的邊界矢量圖
        {
            // 為了支持中文路徑，請添加下面這句代碼
            OSGeo.GDAL.Gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "NO");
            // 為了使屬性表字段支持中文，請添加下面這句
            OSGeo.GDAL.Gdal.SetConfigOption("SHAPE_ENCODING", "");
            // 注冊所有的驅動
            Ogr.RegisterAll();

            //創建數據，創建ESRI的shp文件
            string strDriverName = "ESRI Shapefile";
            Driver oDriver = Ogr.GetDriverByName(strDriverName);
            if (oDriver == null)
            {
                Debug.WriteLine("%s 驅動不可用！\n", strVectorFile);
                return;
            }

            // 步驟1、創建數據源
            DataSource oDS = oDriver.CreateDataSource(strVectorFile, null);
            if (oDS == null)
            {
                Debug.WriteLine("創建矢量文件【%s】失敗！", strVectorFile);
                return;
            }
            //步驟2、創建空間坐標系
            OSGeo.OSR.SpatialReference oSRS = new OSGeo.OSR.SpatialReference("");
            oSRS.SetWellKnownGeogCS("WGS84");
            //步驟3、創建圖層，並添加坐標系，創建一個多邊形圖層(wkbGeometryType.wkbUnknown,存放任意幾何特征)
            Layer oLayer = oDS.CreateLayer("TestPolygon", oSRS, wkbGeometryType.wkbUnknown, null);
            if (oLayer == null)
            {
                Debug.WriteLine("圖層創建失敗！");
                return;
            }

            // 步驟4、下面創建屬性表
            FieldDefn oFieldPlotArea = new FieldDefn("PlotArea", FieldType.OFTString);          // 先創建一個叫PlotArea的屬性
            oFieldPlotArea.SetWidth(100);
            // 步驟5、將創建的屬性表添加到圖層中
            oLayer.CreateField(oFieldPlotArea, 1);
            //步驟6、定義一個特征要素oFeature(特征要素包含兩個方面1.屬性特征2.幾何特征)
            FeatureDefn oDefn = oLayer.GetLayerDefn();
            Feature oFeature = new Feature(oDefn);    //建立了一個特征要素並將指向圖層oLayer的屬性表
            //步驟7、設置屬性特征的值
            oFeature.SetField(0, area.ToString());

            OSGeo.OGR.Geometry geomTriangle = OSGeo.OGR.Geometry.CreateFromWkt(wkt);//創建一個幾何特征
            //步驟8、設置幾何特征
            oFeature.SetGeometry(geomTriangle);
            //步驟9、將特征要素添加到圖層中
            oLayer.CreateFeature(oFeature);
            //Debug.WriteLine("數據集創建完成！");
        }

 WKT

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