结合C++和GDAL实现shapefile（shp)文件的读取

int main()
{
    GDALAllRegister();
    GDALDataset   *poDS;
    CPLSetConfigOption("SHAPE_ENCODING","");  //解决中文乱码问题
    //读取shp文件
    poDS = (GDALDataset*) GDALOpenEx("d:/shapefile/bou2_4p.shp", GDAL_OF_VECTOR, NULL, NULL, NULL );
    
    if( poDS == NULL )
    {
        printf( "Open failed.\n%s" );
        return 0;
    }

    OGRLayer  *poLayer;
    poLayer = poDS->GetLayer(0); //读取层
    OGRFeature *poFeature;

    poLayer->ResetReading();
    int i=0;
    while( (poFeature = poLayer->GetNextFeature()) != NULL )
    {
        if(poFeature->GetFieldAsDouble("AREA")<1) continue; //去掉面积过小的polygon
        i=i++;
        cout<<i<<"  ";
        OGRFeatureDefn *poFDefn = poLayer->GetLayerDefn();
        int iField;
        int n=poFDefn->GetFieldCount(); //获得字段的数目，不包括前两个字段（FID,Shape);
        for( iField = 0; iField <n; iField++ )
        {
            //输出每个字段的值
            cout<<poFeature->GetFieldAsString(iField)<<"    ";
        }
        cout<<endl;
        OGRFeature::DestroyFeature( poFeature );
    }
    GDALClose( poDS );
    system("pause");
    return 1;
}