ogr2ogr.cpp

mitab,读取MapInfo的地图文件

        else if( EQUAL(papszArgv[iArg],"-spat") 
                 && papszArgv[iArg+1] != NULL 
                 && papszArgv[iArg+2] != NULL 
                 && papszArgv[iArg+3] != NULL 
                 && papszArgv[iArg+4] != NULL )
        {
            OGRLinearRing  oRing;

            oRing.addPoint( atof(papszArgv[iArg+1]), atof(papszArgv[iArg+2]) );
            oRing.addPoint( atof(papszArgv[iArg+1]), atof(papszArgv[iArg+4]) );
            oRing.addPoint( atof(papszArgv[iArg+3]), atof(papszArgv[iArg+4]) );
            oRing.addPoint( atof(papszArgv[iArg+3]), atof(papszArgv[iArg+2]) );
            oRing.addPoint( atof(papszArgv[iArg+1]), atof(papszArgv[iArg+2]) );

            poSpatialFilter = new OGRPolygon();
            ((OGRPolygon *) poSpatialFilter)->addRing( &oRing );
            iArg += 4;
        }
        else if( EQUAL(papszArgv[iArg],"-where") && papszArgv[iArg+1] != NULL )
        {
            pszWHERE = papszArgv[++iArg];
        }
        else if( EQUAL(papszArgv[iArg],"-select") && papszArgv[iArg+1] != NULL)
        {
            pszSelect = papszArgv[++iArg];
            papszSelFields = CSLTokenizeStringComplex(pszSelect, " ,", 
                                                      FALSE, FALSE );
        }
        else if( papszArgv[iArg][0] == '-' )
        {
            Usage();
        }
        else if( pszDestDataSource == NULL )
            pszDestDataSource = papszArgv[iArg];
        else if( pszDataSource == NULL )
            pszDataSource = papszArgv[iArg];
        else
            papszLayers = CSLAddString( papszLayers, papszArgv[iArg] );
    }

    if( pszDataSource == NULL )
        Usage();

/* -------------------------------------------------------------------- */
/*      Open data source.                                               */
/* -------------------------------------------------------------------- */
    OGRDataSource       *poDS;
        
    poDS = OGRSFDriverRegistrar::Open( pszDataSource, FALSE );

/* -------------------------------------------------------------------- */
/*      Report failure                                                  */
/* -------------------------------------------------------------------- */
    if( poDS == NULL )
    {
        OGRSFDriverRegistrar    *poR = OGRSFDriverRegistrar::GetRegistrar();
        
        printf( "FAILURE:\n"
                "Unable to open datasource `%s' with the following drivers.\n",
                pszDataSource );

        for( int iDriver = 0; iDriver < poR->GetDriverCount(); iDriver++ )
        {
            printf( "  -> %s\n", poR->GetDriver(iDriver)->GetName() );
        }

        exit( 1 );
    }

/* -------------------------------------------------------------------- */
/*      Try opening the output datasource as an existing, writable      */
/* -------------------------------------------------------------------- */
    OGRDataSource       *poODS;
    
    if( bUpdate )
    {
        poODS = OGRSFDriverRegistrar::Open( pszDestDataSource, TRUE );
        if( poODS == NULL )
        {
            printf( "FAILURE:\n"
                    "Unable to open existing output datasource `%s'.\n",
                    pszDestDataSource );
            exit( 1 );
        }
    }

/* -------------------------------------------------------------------- */
/*      Find the output driver.                                         */
/* -------------------------------------------------------------------- */
    else
    {
        OGRSFDriverRegistrar *poR = OGRSFDriverRegistrar::GetRegistrar();
        OGRSFDriver          *poDriver = NULL;
        int                  iDriver;

        for( iDriver = 0;
             iDriver < poR->GetDriverCount() && poDriver == NULL;
             iDriver++ )
        {
            if( EQUAL(poR->GetDriver(iDriver)->GetName(),pszFormat) )
            {
                poDriver = poR->GetDriver(iDriver);
            }
        }

        if( poDriver == NULL )
        {
            printf( "Unable to find driver `%s'.\n", pszFormat );
            printf( "The following drivers are available:\n" );
        
            for( iDriver = 0; iDriver < poR->GetDriverCount(); iDriver++ )
            {
                printf( "  -> `%s'\n", poR->GetDriver(iDriver)->GetName() );
            }
            exit( 1 );
        }

        if( !poDriver->TestCapability( ODrCCreateDataSource ) )
        {
            printf( "%s driver does not support data source creation.\n",
                    pszFormat );
            exit( 1 );
        }

/* -------------------------------------------------------------------- */
/*      Create the output data source.                                  */
/* -------------------------------------------------------------------- */
        poODS = poDriver->CreateDataSource( pszDestDataSource, papszDSCO );
        if( poODS == NULL )
        {
            printf( "%s driver failed to create %s\n", 
                    pszFormat, pszDestDataSource );
            exit( 1 );
        }
    }

/* -------------------------------------------------------------------- */
/*      Parse the output SRS definition if possible.                    */
/* -------------------------------------------------------------------- */
    if( pszOutputSRSDef != NULL )
    {
        poOutputSRS = new OGRSpatialReference();
        if( poOutputSRS->SetFromUserInput( pszOutputSRSDef ) != OGRERR_NONE )
        {
            printf( "Failed to process SRS definition: %s\n", 
                    pszOutputSRSDef );
            exit( 1 );
        }
    }

/* -------------------------------------------------------------------- */
/*      Parse the source SRS definition if possible.                    */
/* -------------------------------------------------------------------- */
    if( pszSourceSRSDef != NULL )
    {
        poSourceSRS = new OGRSpatialReference();
        if( poSourceSRS->SetFromUserInput( pszSourceSRSDef ) != OGRERR_NONE )
        {
            printf( "Failed to process SRS definition: %s\n", 
                    pszSourceSRSDef );
            exit( 1 );
        }
    }

/* -------------------------------------------------------------------- */
/*      Special case for -sql clause.  No source layers required.       */
/* -------------------------------------------------------------------- */
    if( pszSQLStatement != NULL )
    {
        OGRLayer *poResultSet;

        if( pszWHERE != NULL )
            printf( "-where clause ignored in combination with -sql.\n" );
        if( CSLCount(papszLayers) > 0 )
            printf( "layer names ignored in combination with -sql.\n" );
        
        poResultSet = poDS->ExecuteSQL( pszSQLStatement, poSpatialFilter, 
                                        NULL );

        if( poResultSet != NULL )
        {
            if( !TranslateLayer( poDS, poResultSet, poODS, papszLCO, 
                                 pszNewLayerName, bTransform, poOutputSRS,
                                 poSourceSRS, papszSelFields, bAppend, eGType))
            {
                CPLError( CE_Failure, CPLE_AppDefined, 
                          "Terminating translation prematurely after failed\n"
                          "translation from sql statement." );

                exit( 1 );
            }
            poDS->ReleaseResultSet( poResultSet );
        }
    }

/* -------------------------------------------------------------------- */
/*      Process each data source layer.                                 */
/* -------------------------------------------------------------------- */
    for( int iLayer = 0; 
         pszSQLStatement == NULL && iLayer < poDS->GetLayerCount(); 
         iLayer++ )
    {
        OGRLayer        *poLayer = poDS->GetLayer(iLayer);

        if( poLayer == NULL )
        {
            printf( "FAILURE: Couldn't fetch advertised layer %d!\n",
                    iLayer );
            exit( 1 );
        }

        if( CSLCount(papszLayers) == 0
            || CSLFindString( papszLayers,
                              poLayer->GetLayerDefn()->GetName() ) != -1 )
        {
            if( pszWHERE != NULL )
                poLayer->SetAttributeFilter( pszWHERE );
            
            if( poSpatialFilter != NULL )
                poLayer->SetSpatialFilter( poSpatialFilter );
            
            if( !TranslateLayer( poDS, poLayer, poODS, papszLCO, 
                                 pszNewLayerName, bTransform, poOutputSRS,
                                 poSourceSRS, papszSelFields, bAppend, eGType) 
                && !bSkipFailures )
            {
                CPLError( CE_Failure, CPLE_AppDefined, 
                          "Terminating translation prematurely after failed\n"
                          "translation of layer %s\n", 
                          poLayer->GetLayerDefn()->GetName() );

                exit( 1 );
            }
        }
    }

/* -------------------------------------------------------------------- */
/*      Close down.                                                     */
/* -------------------------------------------------------------------- */
    delete poODS;
    delete poDS;

    CSLDestroy(papszSelFields);

#ifdef DBMALLOC
    malloc_dump(1);
#endif
    
    return 0;
}

/************************************************************************/
/*                               Usage()                                */
/************************************************************************/

static void Usage()

{
    OGRSFDriverRegistrar        *poR = OGRSFDriverRegistrar::GetRegistrar();

    printf( "Usage: ogr2ogr [-skipfailures] [-append] [-update] [-f format_name]\n"
            "               [-select field_list] [-where restricted_where] \n"
            "               [-sql <sql statement>] \n" 
            "               [-spat xmin ymin xmax ymax] [-preserve_fid] [-fid FID]\n"
            "               [-a_srs srs_def] [-t_srs srs_def] [-s_srs srs_def]\n"
            "               [[-dsco NAME=VALUE] ...] dst_datasource_name\n"
            "               src_datasource_name\n"
            "               [-lco NAME=VALUE] [-nln name] [-nlt type] layer [layer ...]]\n"
            "\n"
            " -f format_name: output file format name, possible values are:\n");
    
    for( int iDriver = 0; iDriver < poR->GetDriverCount(); iDriver++ )
    {
        OGRSFDriver *poDriver = poR->GetDriver(iDriver);

        if( poDriver->TestCapability( ODrCCreateDataSource ) )
            printf( "     -f \"%s\"\n", poDriver->GetName() );
    }

    printf( " -append: Append to existing layer instead of creating new\n"
            " -update: Open existing output datasource in update mode\n"
            " -select field_list: Comma-delimited list of fields from input layer to\n"
            "                     copy to the new layer (defaults to all)\n" 
            " -where restricted_where: Attribute query (like SQL WHERE)\n"