s57featuredefns.cpp

来自「支持各种栅格图像和矢量图像读取的库」· C++ 代码 · 共 534 行 · 第 1/2 页

    poFDefn->AddFieldDefn( &oField );

/* -------------------------------------------------------------------- */
/*      For lines we want to capture the point links for the first      */
/*      and last nodes.                                                 */
/* -------------------------------------------------------------------- */
    if( nRCNM == RCNM_VE )
    {
        oField.Set( "NAME_RCNM_0", OFTInteger, 3, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "NAME_RCID_0", OFTInteger, 8, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "ORNT_0", OFTInteger, 3, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "USAG_0", OFTInteger, 3, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "TOPI_0", OFTInteger, 1, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "MASK_0", OFTInteger, 3, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "NAME_RCNM_1", OFTInteger, 3, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "NAME_RCID_1", OFTInteger, 8, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "ORNT_1", OFTInteger, 3, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "USAG_1", OFTInteger, 3, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "TOPI_1", OFTInteger, 1, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "MASK_1", OFTInteger, 3, 0 );
        poFDefn->AddFieldDefn( &oField );
    }

    return poFDefn;
}

/************************************************************************/
/*                     S57GenerateObjectClassDefn()                     */
/************************************************************************/

OGRFeatureDefn *S57GenerateObjectClassDefn( S57ClassRegistrar *poCR,
                                            int nOBJL, int nOptionFlags )

{
    OGRFeatureDefn      *poFDefn = NULL;
    char               **papszGeomPrim;

    if( !poCR->SelectClass( nOBJL ) )
        return NULL;
    
/* -------------------------------------------------------------------- */
/*      Create the feature definition based on the object class         */
/*      acronym.                                                        */
/* -------------------------------------------------------------------- */
    poFDefn = new OGRFeatureDefn( poCR->GetAcronym() );
    poFDefn->Reference();

/* -------------------------------------------------------------------- */
/*      Try and establish the geometry type.  If more than one          */
/*      geometry type is allowed we just fall back to wkbUnknown.       */
/* -------------------------------------------------------------------- */
    papszGeomPrim = poCR->GetPrimitives();
    if( CSLCount(papszGeomPrim) == 0 )
    {
        poFDefn->SetGeomType( wkbNone );
    }
    else if( CSLCount(papszGeomPrim) > 1 )
    {
        // leave as unknown geometry type.
    }
    else if( papszGeomPrim[0][0] == 'P' )
    {
        if( EQUAL(poCR->GetAcronym(),"SOUNDG") )
        {
            if( nOptionFlags & S57M_SPLIT_MULTIPOINT )
                poFDefn->SetGeomType( wkbPoint25D );
            else
                poFDefn->SetGeomType( wkbMultiPoint );
        }
        else
            poFDefn->SetGeomType( wkbPoint );
    }
    else if( papszGeomPrim[0][0] == 'A' )
    {
        poFDefn->SetGeomType( wkbPolygon );
    }
    else if( papszGeomPrim[0][0] == 'L' )
    {
        poFDefn->SetGeomType( wkbLineString );
    }
    
/* -------------------------------------------------------------------- */
/*      Add the standard attributes.                                    */
/* -------------------------------------------------------------------- */
    S57GenerateStandardAttributes( poFDefn, nOptionFlags );

/* -------------------------------------------------------------------- */
/*      Add the attributes specific to this object class.               */
/* -------------------------------------------------------------------- */
    char        **papszAttrList = poCR->GetAttributeList();

    for( int iAttr = 0;
         papszAttrList != NULL && papszAttrList[iAttr] != NULL;
         iAttr++ )
    {
        int     iAttrIndex = poCR->FindAttrByAcronym( papszAttrList[iAttr] );

        if( iAttrIndex == -1 )
        {
            CPLDebug( "S57", "Can't find attribute %s from class %s:%s.\n",
                      papszAttrList[iAttr],
                      poCR->GetAcronym(),
                      poCR->GetDescription() );
            continue;
        }

        OGRFieldDefn    oField( papszAttrList[iAttr], OFTInteger );
        
        switch( poCR->GetAttrType( iAttrIndex ) )
        {
          case SAT_ENUM:
          case SAT_INT:
            oField.SetType( OFTInteger );
            break;

          case SAT_FLOAT:
            oField.SetType( OFTReal );
            break;

          case SAT_CODE_STRING:
          case SAT_FREE_TEXT:
            oField.SetType( OFTString );
            break;

          case SAT_LIST:
            oField.SetType( OFTString );
            break;
        }

        poFDefn->AddFieldDefn( &oField );
    }


/* -------------------------------------------------------------------- */
/*      Do we need to add DEPTH attributes to soundings?                */
/* -------------------------------------------------------------------- */
    if( EQUAL(poCR->GetAcronym(),"SOUNDG") 
        && (nOptionFlags & S57M_ADD_SOUNDG_DEPTH) )
    {
        OGRFieldDefn    oField( "DEPTH", OFTReal );
        poFDefn->AddFieldDefn( &oField );
    }

    return poFDefn;
}

/************************************************************************/
/*                   S57GenerateStandardAttributes()                    */
/*                                                                      */
/*      Attach standard feature attributes to a feature definition.     */
/************************************************************************/

void S57GenerateStandardAttributes( OGRFeatureDefn *poFDefn, int nOptionFlags )

{
    OGRFieldDefn        oField( "", OFTInteger );

/* -------------------------------------------------------------------- */
/*      RCID                                                            */
/* -------------------------------------------------------------------- */
    oField.Set( "RCID", OFTInteger, 10, 0 );
    poFDefn->AddFieldDefn( &oField );

/* -------------------------------------------------------------------- */
/*      PRIM                                                            */
/* -------------------------------------------------------------------- */
    oField.Set( "PRIM", OFTInteger, 3, 0 );
    poFDefn->AddFieldDefn( &oField );

/* -------------------------------------------------------------------- */
/*      GRUP                                                            */
/* -------------------------------------------------------------------- */
    oField.Set( "GRUP", OFTInteger, 3, 0 );
    poFDefn->AddFieldDefn( &oField );

/* -------------------------------------------------------------------- */
/*      OBJL                                                            */
/* -------------------------------------------------------------------- */
    oField.Set( "OBJL", OFTInteger, 5, 0 );
    poFDefn->AddFieldDefn( &oField );

/* -------------------------------------------------------------------- */
/*      RVER                                                            */
/* -------------------------------------------------------------------- */
    oField.Set( "RVER", OFTInteger, 3, 0 );
    poFDefn->AddFieldDefn( &oField );

/* -------------------------------------------------------------------- */
/*      AGEN                                                            */
/* -------------------------------------------------------------------- */
    oField.Set( "AGEN", OFTInteger, 5, 0 );
    poFDefn->AddFieldDefn( &oField );

/* -------------------------------------------------------------------- */
/*      FIDN                                                            */
/* -------------------------------------------------------------------- */
    oField.Set( "FIDN", OFTInteger, 10, 0 );
    poFDefn->AddFieldDefn( &oField );

/* -------------------------------------------------------------------- */
/*      FIDS                                                            */
/* -------------------------------------------------------------------- */
    oField.Set( "FIDS", OFTInteger, 5, 0 );
    poFDefn->AddFieldDefn( &oField );

/* -------------------------------------------------------------------- */
/*      LNAM - only generated when LNAM strings are being used.         */
/* -------------------------------------------------------------------- */
    if( nOptionFlags & S57M_LNAM_REFS )
    {
        oField.Set( "LNAM", OFTString, 16, 0 );
        poFDefn->AddFieldDefn( &oField );
        
        oField.Set( "LNAM_REFS", OFTStringList, 16, 0 );
        poFDefn->AddFieldDefn( &oField );
        
        oField.Set( "FFPT_RIND", OFTIntegerList, 1, 0 );
        poFDefn->AddFieldDefn( &oField );

        // We should likely include FFPT_COMT here. 
    }

/* -------------------------------------------------------------------- */
/*      Values from FSPT field.                                         */
/* -------------------------------------------------------------------- */
    if( nOptionFlags & S57M_RETURN_LINKAGES )
    {
        oField.Set( "NAME_RCNM", OFTIntegerList, 3, 0 );
        poFDefn->AddFieldDefn( &oField );
        
        oField.Set( "NAME_RCID", OFTIntegerList, 10, 0 );
        poFDefn->AddFieldDefn( &oField );
        
        oField.Set( "ORNT", OFTIntegerList, 1, 0 );
        poFDefn->AddFieldDefn( &oField );
        
        oField.Set( "USAG", OFTIntegerList, 1, 0 );
        poFDefn->AddFieldDefn( &oField );

        oField.Set( "MASK", OFTIntegerList, 3, 0 );
        poFDefn->AddFieldDefn( &oField );
    }
}