ntf.h

GIS系统支持库Geospatial Data Abstraction Library代码.GDAL is a translator library for raster geospatial dat

    void              ClearCGroup();
    void              ClearDefs();

    OGRNTFLayer       *apoTypeTranslation[100];

    NTFRecordGrouper  pfnRecordGrouper;

    int               anIndexSize[100];
    NTFRecord         **apapoRecordIndex[100];
    int               bIndexBuilt;
    int               bIndexNeeded;

    void              EstablishRasterAccess();
    int               nRasterXSize;
    int               nRasterYSize;
    int               nRasterDataType;
    double            adfGeoTransform[6];

    OGRNTFRasterLayer *poRasterLayer;

    long             *panColumnOffset;

    int               bCacheLines;
    int               nLineCacheSize;
    OGRGeometry     **papoLineCache;

  public:
                      NTFFileReader( OGRNTFDataSource * );
                      ~NTFFileReader();

    int               Open( const char * pszFilename = NULL );
    void              Close();
    FILE              *GetFP() { return fp; }
    void              GetFPPos( long *pnPos, long * pnFeatureId);
    int               SetFPPos( long nPos, long nFeatureId );
    void              Reset();
    void              SetBaseFID( long nFeatureId );
  
    
    OGRGeometry      *ProcessGeometry( NTFRecord *, int * = NULL );
    OGRGeometry      *ProcessGeometry3D( NTFRecord *, int * = NULL );
    int               ProcessAttDesc( NTFRecord *, NTFAttDesc * );
    int               ProcessAttRec( NTFRecord *, int *, char ***, char ***);
    int               ProcessAttRecGroup( NTFRecord **, char ***, char ***);

    NTFAttDesc       *GetAttDesc( const char * );

    void              ApplyAttributeValues( OGRFeature *, NTFRecord **, ... );
     
    int               ApplyAttributeValue( OGRFeature *, int, const char *,
                                           char **, char ** );
    
    int               ProcessAttValue( const char *pszValType, 
                                       const char *pszRawValue,
                                       char **ppszAttName, 
                                       char **ppszAttValue,
                                       char **ppszCodeDesc );

    int               TestForLayer( OGRNTFLayer * );
    OGRFeature       *ReadOGRFeature( OGRNTFLayer * = NULL );
    NTFRecord       **ReadRecordGroup();
    NTFRecord        *ReadRecord();
    void              SaveRecord( NTFRecord * );

    void              DumpReadable( FILE * );

    int               GetXYLen() { return nCoordWidth; }
    double            GetXYMult() { return dfXYMult; }
    double            GetXOrigin() { return dfXOrigin; }
    double            GetYOrigin() { return dfYOrigin; }
    double            GetZMult() { return dfZMult; }
    const char       *GetTileName() { return pszTileName; }
    const char       *GetFilename() { return pszFilename; }
    int               GetNTFLevel() { return nNTFLevel; }
    const char       *GetProduct() { return pszProduct; }
    const char       *GetPVName() { return pszPVName; }
    int               GetProductId() { return nProduct; }
    double            GetScale() { return dfScale; }
    double            GetPaperToGround() { return dfPaperToGround; }

    int               GetFCCount() { return nFCCount; }
    int               GetFeatureClass( int, char **, char ** );

    void              OverrideTileName( const char * );

    // Generic file index
    void              IndexFile();
    void              FreshenIndex();
    void              DestroyIndex();
    NTFRecord        *GetIndexedRecord( int, int );
    NTFRecord       **GetNextIndexedRecordGroup( NTFRecord ** );

    // Line geometry cache
    OGRGeometry      *CacheGetByGeomId( int );
    void              CacheAddByGeomId( int, OGRGeometry * );
    void              CacheClean();
    void              CacheLineGeometryInGroup( NTFRecord ** );

    int               FormPolygonFromCache( OGRFeature * );

    // just for use of OGRNTFDatasource
    void              EstablishLayer( const char *, OGRwkbGeometryType,
                                      NTFFeatureTranslator, int,
                                      NTFGenericClass *, ... );

    // Raster related
    int               IsRasterProduct();
    int               GetRasterXSize() { return nRasterXSize; }
    int               GetRasterYSize() { return nRasterYSize; }
    int               GetRasterDataType() { return nRasterDataType; }
    double           *GetGeoTransform() { return adfGeoTransform; }
    CPLErr            ReadRasterColumn( int, float * );
    
};

/************************************************************************/
/*                             OGRNTFLayer                              */
/************************************************************************/

class OGRNTFLayer : public OGRLayer
{
    OGRFeatureDefn     *poFeatureDefn;
    NTFFeatureTranslator pfnTranslator;

    OGRNTFDataSource   *poDS;

    int                 iCurrentReader;
    long                nCurrentPos;
    long                nCurrentFID;
  
  public:
                        OGRNTFLayer( OGRNTFDataSource * poDS,
                                     OGRFeatureDefn * poFeatureDefine,
                                     NTFFeatureTranslator pfnTranslator );

                        ~OGRNTFLayer();

    void                ResetReading();
    OGRFeature *        GetNextFeature();

#ifdef notdef    
    OGRFeature         *GetFeature( long nFeatureId );
    OGRErr              SetFeature( OGRFeature *poFeature );
    OGRErr              CreateFeature( OGRFeature *poFeature );
#endif
    
    OGRFeatureDefn *    GetLayerDefn() { return poFeatureDefn; }

#ifdef notdef    
    int                 GetFeatureCount( int );
#endif
    
    int                 TestCapability( const char * );

    virtual OGRSpatialReference *GetSpatialRef();

    // special to NTF
    OGRFeature         *FeatureTranslate( NTFFileReader *, NTFRecord ** );
};

/************************************************************************/
/*                       OGRNTFFeatureClassLayer                        */
/************************************************************************/

class OGRNTFFeatureClassLayer : public OGRLayer
{
    OGRFeatureDefn     *poFeatureDefn;
    OGRGeometry        *poFilterGeom;

    OGRNTFDataSource   *poDS;

    int                 iCurrentFC;
  
  public:
                        OGRNTFFeatureClassLayer( OGRNTFDataSource * poDS );
                        ~OGRNTFFeatureClassLayer();

    OGRGeometry *       GetSpatialFilter() { return poFilterGeom; }
    void                SetSpatialFilter( OGRGeometry * );

    void                ResetReading();
    OGRFeature *        GetNextFeature();

    OGRFeature         *GetFeature( long nFeatureId );
    
    OGRFeatureDefn *    GetLayerDefn() { return poFeatureDefn; }

    int                 GetFeatureCount( int = TRUE );
    
    int                 TestCapability( const char * );
};

/************************************************************************/
/*                          OGRNTFRasterLayer                           */
/************************************************************************/

class OGRNTFRasterLayer : public OGRLayer
{
    OGRFeatureDefn     *poFeatureDefn;
    OGRGeometry        *poFilterGeom;

    OGRNTFDataSource   *poDS;

    NTFFileReader      *poReader;

    float              *pafColumn;
    int                 iColumnOffset;

    int                 iCurrentFC;
  
    int                 nDEMSample;
    int                 nFeatureCount;
    
  public:
                        OGRNTFRasterLayer( OGRNTFDataSource * poDS,
                                           NTFFileReader * poReaderIn );
                        ~OGRNTFRasterLayer();

    OGRGeometry *       GetSpatialFilter() { return poFilterGeom; }
    void                SetSpatialFilter( OGRGeometry * );

    void                ResetReading();
    OGRFeature *        GetNextFeature();

    OGRFeature         *GetFeature( long nFeatureId );
    
    OGRFeatureDefn *    GetLayerDefn() { return poFeatureDefn; }

    int                 GetFeatureCount( int = TRUE );
    
    virtual OGRSpatialReference *GetSpatialRef();
    
    int                 TestCapability( const char * );
};

/************************************************************************/
/*                           OGRNTFDataSource                           */
/************************************************************************/

class OGRNTFDataSource : public OGRDataSource
{
    char                *pszName;

    int                 nLayers;
    OGRLayer            **papoLayers;

    OGRNTFFeatureClassLayer *poFCLayer;

    int                 iCurrentFC;
    int                 iCurrentReader;
    long                nCurrentPos;
    long                nCurrentFID;
  
    int                 nNTFFileCount;
    NTFFileReader       **papoNTFFileReader;

    int                 nFCCount;
    char              **papszFCNum;
    char              **papszFCName;

    OGRSpatialReference *poSpatialRef;

    NTFGenericClass     aoGenericClass[100];

    char                **papszOptions;

    void                EnsureTileNameUnique( NTFFileReader * );
    
  public:
                        OGRNTFDataSource();
                        ~OGRNTFDataSource();

    void                SetOptionList( char ** );
    const char         *GetOption( const char * );
    
    int                 Open( const char * pszName, int bTestOpen = FALSE,
                              char ** papszFileList = NULL );
    
    const char          *GetName() { return pszName; }
    int                 GetLayerCount();
    OGRLayer            *GetLayer( int );
    int                 TestCapability( const char * );

    // Note: these are specific to NTF for now, but eventually might
    // might be available as part of a more object oriented approach to
    // features like that in FME or SFCORBA.
    void                ResetReading();
    OGRFeature *        GetNextFeature();

    // these are only for the use of the NTFFileReader class.
    OGRNTFLayer         *GetNamedLayer( const char * );
    void                 AddLayer( OGRLayer * );

    // Mainly for OGRNTFLayer class
    int                  GetFileCount() { return nNTFFileCount; }
    NTFFileReader       *GetFileReader(int i) { return papoNTFFileReader[i]; }

    int                  GetFCCount() { return nFCCount; }
    int                  GetFeatureClass( int, char **, char ** );

    OGRSpatialReference *GetSpatialRef() { return poSpatialRef; }

    NTFGenericClass     *GetGClass( int i ) { return aoGenericClass + i; }
    void                WorkupGeneric( NTFFileReader * );
    void                EstablishGenericLayers();
};

/************************************************************************/
/*                             OGRNTFDriver                             */
/************************************************************************/

class OGRNTFDriver : public OGRSFDriver
{
  public:
                ~OGRNTFDriver();
                
    const char *GetName();
    OGRDataSource *Open( const char *, int );
    int                 TestCapability( const char * );
};

/************************************************************************/
/*                          Support functions.                          */
/************************************************************************/
int NTFArcCenterFromEdgePoints( double x_c0, double y_c0,
                                double x_c1, double y_c1, 
                                double x_c2, double y_c2, 
                                double *x_center, double *y_center );
OGRGeometry *
NTFStrokeArcToOGRGeometry_Points( double dfStartX, double dfStartY,
                                  double dfAlongX, double dfAlongY,
                                  double dfEndX, double dfEndY,
                                  int nVertexCount );
OGRGeometry *
NTFStrokeArcToOGRGeometry_Angles( double dfCenterX, double dfCenterY, 
                                  double dfRadius, 
                                  double dfStartAngle, double dfEndAngle,
                                  int nVertexCount );

#endif /* ndef _NTF_H_INCLUDED */