结合C++和GDAL实现shapefile（shp)文件的创建和写入

int main()
   {
    const char *pszDriverName = "ESRI Shapefile";
    GDALDriver *poDriver;
    GDALAllRegister();
    poDriver = GetGDALDriverManager()->GetDriverByName(pszDriverName );
    if( poDriver == NULL )
    {
        printf( "%s driver not available.\n", pszDriverName ); 
        return 0; 
    }
    GDALDataset *poDS;

    poDS = poDriver->Create("d:/newShp.shp", 0, 0, 0, GDT_Unknown, NULL ); //创建shp文件
    if( poDS == NULL )
    {
        printf( "Creation of output file failed.\n" ); 
        return 0;
    }
    OGRLayer *poLayer;
    poLayer = poDS->CreateLayer( "point_out", NULL, wkbPoint, NULL );
    if( poLayer == NULL )
    { 
        printf( "Layer creation failed.\n" );
        return 0;
    }
    OGRFieldDefn idField("ID",OFTReal);
    OGRFieldDefn firstField("NAME",OFTInteger);
    OGRFieldDefn secondField("X",OFTReal);
    OGRFieldDefn thirdField("Y",OFTReal);
    idField.SetWidth(32);
    firstField.SetWidth(32);
    secondField.SetWidth(32);
    thirdField.SetWidth(32);
    poLayer->CreateField(&idField);
    poLayer->CreateField(&firstField);
    poLayer->CreateField(&secondField);
    poLayer->CreateField(&thirdField);


    int x, y;
    int a=10,b=100;
    for(int i=1;i<=10;i++)
    { 
        OGRFeature *poFeature; 
        poFeature = OGRFeature::CreateFeature( poLayer->GetLayerDefn() ); 
        poFeature->SetField("ID",i);
        poFeature->SetField("NAME",i);
        x=(rand() % (b-a))+ a;
        y=(rand() % (b-a))+ a;
        poFeature->SetField("X",x);
        poFeature->SetField("Y",y);
        OGRPoint pt; 
        pt.setX( x );
        pt.setY( y ); 
        poFeature->SetGeometry( &pt ); 
        if( poLayer->CreateFeature( poFeature ) != OGRERR_NONE ) 
        { 
            printf( "Failed to create feature in shapefile.\n" );
            return 0;
        } 
        OGRFeature::DestroyFeature( poFeature );
    }
    GDALClose( poDS );
    return 1;
}