ogr_spatialref.h

在linux环境下

/******************************************************************************
 * $Id: ogr_spatialref.h,v 1.51 2003/05/30 15:39:53 warmerda Exp $
 *
 * Project:  OpenGIS Simple Features Reference Implementation
 * Purpose:  Classes for manipulating spatial reference systems in a
 *           platform non-specific manner.
 * Author:   Frank Warmerdam, [e-mail]
 *
 ******************************************************************************
 * Copyright (c) 1999,  Les Technologies SoftMap Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ******************************************************************************
 *
 * $Log: ogr_spatialref.h,v $
 * Revision 1.51  2003/05/30 15:39:53  warmerda
 * Added override units capability for SetStatePlane()
 *
 * Revision 1.50  2003/05/28 19:16:42  warmerda
 * fixed up argument names and stuff for docs
 *
 * Revision 1.49  2003/03/12 14:25:01  warmerda
 * added NeedsQuoting() method
 *
 * Revision 1.48  2003/02/25 04:53:51  warmerda
 * added CopyGeogCSFrom() method
 *
 * Revision 1.47  2003/02/06 04:53:12  warmerda
 * added Fixup() method
 *
 * Revision 1.46  2003/01/08 18:14:28  warmerda
 * added FixupOrdering()
 *
 * Revision 1.45  2002/12/16 17:06:51  warmerda
 * added GetPrimeMeridian() method
 *
 * Revision 1.44  2002/12/15 23:42:59  warmerda
 * added initial support for normalizing proj params
 *
 * Revision 1.43  2002/12/14 22:59:14  warmerda
 * added Krovak in ESRI compatible way
 *
 * Revision 1.42  2002/12/10 04:04:38  warmerda
 * added parent pointer to OGR_SRSNode
 *
 * Revision 1.41  2002/12/09 16:11:02  warmerda
 * fixed constness of get authority calls
 *
 * Revision 1.40  2002/12/01 21:16:10  warmerda
 * added Get/set angular units methods
 *
 * Revision 1.39  2002/11/25 16:12:54  warmerda
 * added GetAuthorityCode/Name
 *
 * Revision 1.38  2002/04/18 14:22:45  warmerda
 * made OGRSpatialReference and co 'const correct'
 *
 * Revision 1.37  2002/03/05 14:25:14  warmerda
 * expand tabs
 *
 * Revision 1.36  2002/01/24 16:21:45  warmerda
 * added StripNodes method, removed simplify flag from pretty wkt
 *
 * Revision 1.35  2001/12/06 18:18:47  warmerda
 * added preliminary xml srs support
 *
 * Revision 1.34  2001/10/11 19:27:12  warmerda
 * upgraded validation infrastructure
 *
 * Revision 1.33  2001/10/10 20:42:43  warmerda
 * added ESRI WKT morphing support
 *
 * Revision 1.32  2001/09/21 16:21:02  warmerda
 * added Clear(), and SetFromUserInput() methods
 *
 * Revision 1.31  2001/07/19 18:25:07  warmerda
 * expanded tabs
 *
 * Revision 1.30  2001/07/16 03:34:55  warmerda
 * various fixes, and improvements suggested by Ben Driscoe on gdal list
 *
 * Revision 1.29  2001/05/24 21:02:42  warmerda
 * moved OGRCoordinateTransform destructor defn
 *
 * Revision 1.28  2001/02/06 17:10:28  warmerda
 * export entry points from DLL
 *
 * Revision 1.27  2001/01/22 13:59:55  warmerda
 * added SetSOC
 *
 * Revision 1.26  2001/01/19 21:10:47  warmerda
 * replaced tabs
 *
 * Revision 1.25  2000/11/09 06:21:32  warmerda
 * added limited ESRI prj support
 *
 * Revision 1.24  2000/10/20 04:19:38  warmerda
 * added setstateplane
 *
 * Revision 1.23  2000/10/16 21:26:07  warmerda
 * added some level of LOCAL_CS support
 *
 * Revision 1.22  2000/08/28 20:13:23  warmerda
 * added importFromProj4
 *
 * Revision 1.21  2000/07/09 20:48:02  warmerda
 * added exportToPrettyWkt
 *
 * Revision 1.20  2000/03/24 14:49:56  warmerda
 * added WGS84 related methods
 *
 * Revision 1.19  2000/03/22 01:09:43  warmerda
 * added SetProjCS and SetWellKnownTextCS
 *
 * Revision 1.18  2000/03/20 23:33:51  warmerda
 * updated docs a bit
 *
 * Revision 1.17  2000/03/20 23:08:05  warmerda
 * Added docs.
 *
 * Revision 1.16  2000/03/20 22:59:36  warmerda
 * Added some documentation.
 *
 * Revision 1.15  2000/03/20 22:39:49  warmerda
 * Added IsSame( method.
 *
 * Revision 1.14  2000/03/20 14:59:35  warmerda
 * added OGRCoordinateTransformation
 *
 * Revision 1.13  2000/03/16 19:04:01  warmerda
 * added SetTMG, moved constants to ogr_srs_api.h
 *
 * Revision 1.12  2000/01/26 21:22:18  warmerda
 * added tentative MakeValueSafe implementation
 *
 * Revision 1.11  2000/01/11 22:12:13  warmerda
 * added InsertChild
 *
 * Revision 1.10  2000/01/06 19:46:10  warmerda
 * added special logic for setting, and recognising UTM
 *
 * Revision 1.9  1999/11/18 19:02:20  warmerda
 * expanded tabs
 *
 * Revision 1.8  1999/09/29 16:36:17  warmerda
 * added several new projections
 *
 * Revision 1.7  1999/09/15 20:34:21  warmerda
 * South_Oriented to SouthOrientated, prototype changes
 *
 * Revision 1.6  1999/09/09 13:53:47  warmerda
 * use lower case for degree and radian
 *
 * Revision 1.5  1999/07/29 17:29:45  warmerda
 * added various help methods for projections
 *
 * Revision 1.4  1999/07/14 05:23:38  warmerda
 * Added projection set methods, and #defined tokens
 *
 * Revision 1.3  1999/06/25 20:21:18  warmerda
 * fleshed out classes
 *
 * Revision 1.2  1999/05/31 17:14:34  warmerda
 * Fixed define.
 *
 * Revision 1.1  1999/05/20 14:35:00  warmerda
 * New
 */

#ifndef _OGR_SPATIALREF_H_INCLUDED
#define _OGR_SPATIALREF_H_INCLUDED

#include "ogr_srs_api.h"

/**
 * \file ogr_spatialref.h
 *
 * Coordinate systems services.
 */

/************************************************************************/
/*                             OGR_SRSNode                              */
/************************************************************************/

/**
 * Objects of this class are used to represent value nodes in the parsed
 * representation of the WKT SRS format.  For instance UNIT["METER",1]
 * would be rendered into three OGR_SRSNodes.  The root node would have a
 * value of UNIT, and two children, the first with a value of METER, and the
 * second with a value of 1.
 *
 * Normally application code just interacts with the OGRSpatialReference
 * object, which uses the OGR_SRSNode to implement it's data structure;
 * however, this class is user accessable for detailed access to components
 * of an SRS definition.
 */

class CPL_DLL OGR_SRSNode
{
    char        *pszValue;

    int         nChildren;
    OGR_SRSNode **papoChildNodes;

    OGR_SRSNode *poParent;

    void        ClearChildren();
    int         NeedsQuoting() const;
    
  public:
                OGR_SRSNode(const char * = NULL);
                ~OGR_SRSNode();

    int         IsLeafNode() const { return nChildren == 0; }
    
    int         GetChildCount() const { return nChildren; }
    OGR_SRSNode *GetChild( int );
    const OGR_SRSNode *GetChild( int ) const;

    OGR_SRSNode *GetNode( const char * );
    const OGR_SRSNode *GetNode( const char * ) const;

    void        InsertChild( OGR_SRSNode *, int );
    void        AddChild( OGR_SRSNode * );
    int         FindChild( const char * ) const;
    void        DestroyChild( int );
    void        StripNodes( const char * );

    const char  *GetValue() const { return pszValue; }
    void        SetValue( const char * );

    void        MakeValueSafe();
    OGRErr      FixupOrdering();

    OGR_SRSNode *Clone() const;

    OGRErr      importFromWkt( char ** );
    OGRErr      exportToWkt( char ** ) const;
    OGRErr      exportToPrettyWkt( char **, int = 1) const;
    
    OGRErr      applyRemapper( const char *pszNode, 
                               char **papszSrcValues, 
                               char **papszDstValues, 
                               int nStepSize = 1,
                               int bChildOfHit = FALSE );
};

/************************************************************************/
/*                         OGRSpatialReference                          */
/************************************************************************/

/**
 * This class respresents a OpenGIS Spatial Reference System, and contains
 * methods for converting between this object organization and well known
 * text (WKT) format.  This object is reference counted as one instance of
 * the object is normally shared between many OGRGeometry objects.
 *
 * Normally application code can fetch needed parameter values for this
 * SRS using GetAttrValue(), but in special cases the underlying parse tree
 * (or OGR_SRSNode objects) can be accessed more directly.
 *
 * See <a href="osr_tutorial.html">the tutorial</a> for more information on
 * how to use this class.
 */

class CPL_DLL OGRSpatialReference
{
    int         nRefCount;

    OGR_SRSNode *poRoot;

    int         bNormInfoSet;
    double      dfFromGreenwich;
    double      dfToMeter;
    double      dfToDegrees;

    OGRErr      ValidateProjection();
    int         IsAliasFor( const char *, const char * );
    void        GetNormInfo() const;

  public:
                OGRSpatialReference(const OGRSpatialReference&);
                OGRSpatialReference(const char * = NULL);
                
    virtual    ~OGRSpatialReference();