1 : /******************************************************************************
2 : * $Id: ogr_spatialref.h 22952 2011-08-19 21:08:31Z rouault $
3 : *
4 : * Project: OpenGIS Simple Features Reference Implementation
5 : * Purpose: Classes for manipulating spatial reference systems in a
6 : * platform non-specific manner.
7 : * Author: Frank Warmerdam, warmerdam@pobox.com
8 : *
9 : ******************************************************************************
10 : * Copyright (c) 1999, Les Technologies SoftMap Inc.
11 : *
12 : * Permission is hereby granted, free of charge, to any person obtaining a
13 : * copy of this software and associated documentation files (the "Software"),
14 : * to deal in the Software without restriction, including without limitation
15 : * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 : * and/or sell copies of the Software, and to permit persons to whom the
17 : * Software is furnished to do so, subject to the following conditions:
18 : *
19 : * The above copyright notice and this permission notice shall be included
20 : * in all copies or substantial portions of the Software.
21 : *
22 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
23 : * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 : * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 : * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 : * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 : * DEALINGS IN THE SOFTWARE.
29 : ****************************************************************************/
30 :
31 : #ifndef _OGR_SPATIALREF_H_INCLUDED
32 : #define _OGR_SPATIALREF_H_INCLUDED
33 :
34 : #include "ogr_srs_api.h"
35 :
36 : /**
37 : * \file ogr_spatialref.h
38 : *
39 : * Coordinate systems services.
40 : */
41 :
42 : /************************************************************************/
43 : /* OGR_SRSNode */
44 : /************************************************************************/
45 :
46 : /**
47 : * Objects of this class are used to represent value nodes in the parsed
48 : * representation of the WKT SRS format. For instance UNIT["METER",1]
49 : * would be rendered into three OGR_SRSNodes. The root node would have a
50 : * value of UNIT, and two children, the first with a value of METER, and the
51 : * second with a value of 1.
52 : *
53 : * Normally application code just interacts with the OGRSpatialReference
54 : * object, which uses the OGR_SRSNode to implement it's data structure;
55 : * however, this class is user accessable for detailed access to components
56 : * of an SRS definition.
57 : */
58 :
59 : class CPL_DLL OGR_SRSNode
60 : {
61 : char *pszValue;
62 :
63 : OGR_SRSNode **papoChildNodes;
64 : OGR_SRSNode *poParent;
65 :
66 : int nChildren;
67 :
68 : int NeedsQuoting() const;
69 :
70 : public:
71 : OGR_SRSNode(const char * = NULL);
72 : ~OGR_SRSNode();
73 :
74 : int IsLeafNode() const { return nChildren == 0; }
75 :
76 37483773 : int GetChildCount() const { return nChildren; }
77 : OGR_SRSNode *GetChild( int );
78 : const OGR_SRSNode *GetChild( int ) const;
79 :
80 : OGR_SRSNode *GetNode( const char * );
81 : const OGR_SRSNode *GetNode( const char * ) const;
82 :
83 : void InsertChild( OGR_SRSNode *, int );
84 : void AddChild( OGR_SRSNode * );
85 : int FindChild( const char * ) const;
86 : void DestroyChild( int );
87 : void ClearChildren();
88 : void StripNodes( const char * );
89 :
90 9145803 : const char *GetValue() const { return pszValue; }
91 : void SetValue( const char * );
92 :
93 : void MakeValueSafe();
94 : OGRErr FixupOrdering();
95 :
96 : OGR_SRSNode *Clone() const;
97 :
98 : OGRErr importFromWkt( char ** );
99 : OGRErr exportToWkt( char ** ) const;
100 : OGRErr exportToPrettyWkt( char **, int = 1) const;
101 :
102 : OGRErr applyRemapper( const char *pszNode,
103 : char **papszSrcValues,
104 : char **papszDstValues,
105 : int nStepSize = 1,
106 : int bChildOfHit = FALSE );
107 : };
108 :
109 : /************************************************************************/
110 : /* OGRSpatialReference */
111 : /************************************************************************/
112 :
113 : /**
114 : * This class respresents a OpenGIS Spatial Reference System, and contains
115 : * methods for converting between this object organization and well known
116 : * text (WKT) format. This object is reference counted as one instance of
117 : * the object is normally shared between many OGRGeometry objects.
118 : *
119 : * Normally application code can fetch needed parameter values for this
120 : * SRS using GetAttrValue(), but in special cases the underlying parse tree
121 : * (or OGR_SRSNode objects) can be accessed more directly.
122 : *
123 : * See <a href="osr_tutorial.html">the tutorial</a> for more information on
124 : * how to use this class.
125 : */
126 :
127 : class CPL_DLL OGRSpatialReference
128 : {
129 : double dfFromGreenwich;
130 : double dfToMeter;
131 : double dfToDegrees;
132 :
133 : OGR_SRSNode *poRoot;
134 :
135 : int nRefCount;
136 : int bNormInfoSet;
137 :
138 : static OGRErr Validate(OGR_SRSNode *poRoot);
139 : static OGRErr ValidateAuthority(OGR_SRSNode *poRoot);
140 : static OGRErr ValidateAxis(OGR_SRSNode *poRoot);
141 : static OGRErr ValidateUnit(OGR_SRSNode *poRoot);
142 : static OGRErr ValidateVertDatum(OGR_SRSNode *poRoot);
143 : static OGRErr ValidateProjection( OGR_SRSNode* poRoot );
144 : static int IsAliasFor( const char *, const char * );
145 : void GetNormInfo() const;
146 :
147 : OGRErr importFromURNPart(const char* pszAuthority,
148 : const char* pszCode,
149 : const char* pszURN);
150 : public:
151 : OGRSpatialReference(const OGRSpatialReference&);
152 : OGRSpatialReference(const char * = NULL);
153 :
154 : virtual ~OGRSpatialReference();
155 :
156 : static void DestroySpatialReference(OGRSpatialReference* poSRS);
157 :
158 : OGRSpatialReference &operator=(const OGRSpatialReference&);
159 :
160 : int Reference();
161 : int Dereference();
162 : int GetReferenceCount() const { return nRefCount; }
163 : void Release();
164 :
165 : OGRSpatialReference *Clone() const;
166 : OGRSpatialReference *CloneGeogCS() const;
167 :
168 : OGRErr exportToWkt( char ** ) const;
169 : OGRErr exportToPrettyWkt( char **, int = FALSE) const;
170 : OGRErr exportToProj4( char ** ) const;
171 : OGRErr exportToPCI( char **, char **, double ** ) const;
172 : OGRErr exportToUSGS( long *, long *, double **, long * ) const;
173 : OGRErr exportToXML( char **, const char * = NULL ) const;
174 : OGRErr exportToPanorama( long *, long *, long *, long *,
175 : double * ) const;
176 : OGRErr exportToERM( char *pszProj, char *pszDatum, char *pszUnits );
177 : OGRErr exportToMICoordSys( char ** ) const;
178 :
179 : OGRErr importFromWkt( char ** );
180 : OGRErr importFromProj4( const char * );
181 : OGRErr importFromEPSG( int );
182 : OGRErr importFromEPSGA( int );
183 : OGRErr importFromESRI( char ** );
184 : OGRErr importFromPCI( const char *, const char * = NULL,
185 : double * = NULL );
186 : OGRErr importFromUSGS( long iProjSys, long iZone,
187 : double *padfPrjParams,
188 : long iDatum, int bAnglesInPackedDMSFormat = TRUE );
189 : OGRErr importFromPanorama( long, long, long, double* );
190 : OGRErr importFromOzi( const char *, const char *, const char * );
191 : OGRErr importFromWMSAUTO( const char *pszAutoDef );
192 : OGRErr importFromXML( const char * );
193 : OGRErr importFromDict( const char *pszDict, const char *pszCode );
194 : OGRErr importFromURN( const char * );
195 : OGRErr importFromERM( const char *pszProj, const char *pszDatum,
196 : const char *pszUnits );
197 : OGRErr importFromUrl( const char * );
198 : OGRErr importFromMICoordSys( const char * );
199 :
200 : OGRErr morphToESRI();
201 : OGRErr morphFromESRI();
202 :
203 : OGRErr Validate();
204 : OGRErr StripCTParms( OGR_SRSNode * = NULL );
205 : OGRErr StripVertical();
206 : OGRErr FixupOrdering();
207 : OGRErr Fixup();
208 :
209 : int EPSGTreatsAsLatLong();
210 : const char *GetAxis( const char *pszTargetKey, int iAxis,
211 : OGRAxisOrientation *peOrientation ) const;
212 : OGRErr SetAxes( const char *pszTargetKey,
213 : const char *pszXAxisName,
214 : OGRAxisOrientation eXAxisOrientation,
215 : const char *pszYAxisName,
216 : OGRAxisOrientation eYAxisOrientation );
217 :
218 : // Machinary for accessing parse nodes
219 1908587 : OGR_SRSNode *GetRoot() { return poRoot; }
220 109187 : const OGR_SRSNode *GetRoot() const { return poRoot; }
221 : void SetRoot( OGR_SRSNode * );
222 :
223 : OGR_SRSNode *GetAttrNode(const char *);
224 : const OGR_SRSNode *GetAttrNode(const char *) const;
225 : const char *GetAttrValue(const char *, int = 0) const;
226 :
227 : OGRErr SetNode( const char *, const char * );
228 : OGRErr SetNode( const char *, double );
229 :
230 : OGRErr SetLinearUnitsAndUpdateParameters( const char *pszName,
231 : double dfInMeters );
232 : OGRErr SetLinearUnits( const char *pszName, double dfInMeters );
233 : OGRErr SetTargetLinearUnits( const char *pszTargetKey,
234 : const char *pszName, double dfInMeters );
235 : double GetLinearUnits( char ** = NULL ) const;
236 : double GetTargetLinearUnits( const char *pszTargetKey,
237 : char ** ppszRetName = NULL ) const;
238 :
239 : OGRErr SetAngularUnits( const char *pszName, double dfInRadians );
240 : double GetAngularUnits( char ** = NULL ) const;
241 :
242 : double GetPrimeMeridian( char ** = NULL ) const;
243 :
244 : int IsGeographic() const;
245 : int IsProjected() const;
246 : int IsGeocentric() const;
247 : int IsLocal() const;
248 : int IsVertical() const;
249 : int IsCompound() const;
250 : int IsSameGeogCS( const OGRSpatialReference * ) const;
251 : int IsSameVertCS( const OGRSpatialReference * ) const;
252 : int IsSame( const OGRSpatialReference * ) const;
253 :
254 : void Clear();
255 : OGRErr SetLocalCS( const char * );
256 : OGRErr SetProjCS( const char * );
257 : OGRErr SetProjection( const char * );
258 : OGRErr SetGeocCS( const char * pszGeocName );
259 : OGRErr SetGeogCS( const char * pszGeogName,
260 : const char * pszDatumName,
261 : const char * pszEllipsoidName,
262 : double dfSemiMajor, double dfInvFlattening,
263 : const char * pszPMName = NULL,
264 : double dfPMOffset = 0.0,
265 : const char * pszUnits = NULL,
266 : double dfConvertToRadians = 0.0 );
267 : OGRErr SetWellKnownGeogCS( const char * );
268 : OGRErr CopyGeogCSFrom( const OGRSpatialReference * poSrcSRS );
269 : OGRErr SetVertCS( const char *pszVertCSName,
270 : const char *pszVertDatumName,
271 : int nVertDatumClass = 2005 );
272 : OGRErr SetCompoundCS( const char *pszName,
273 : const OGRSpatialReference *poHorizSRS,
274 : const OGRSpatialReference *poVertSRS );
275 :
276 : OGRErr SetFromUserInput( const char * );
277 :
278 : OGRErr SetTOWGS84( double, double, double,
279 : double = 0.0, double = 0.0, double = 0.0,
280 : double = 0.0 );
281 : OGRErr GetTOWGS84( double *padfCoef, int nCoeff = 7 ) const;
282 :
283 : double GetSemiMajor( OGRErr * = NULL ) const;
284 : double GetSemiMinor( OGRErr * = NULL ) const;
285 : double GetInvFlattening( OGRErr * = NULL ) const;
286 :
287 : OGRErr SetAuthority( const char * pszTargetKey,
288 : const char * pszAuthority,
289 : int nCode );
290 :
291 : OGRErr AutoIdentifyEPSG();
292 : int GetEPSGGeogCS();
293 :
294 : const char *GetAuthorityCode( const char * pszTargetKey ) const;
295 : const char *GetAuthorityName( const char * pszTargetKey ) const;
296 :
297 : const char *GetExtension( const char *pszTargetKey,
298 : const char *pszName,
299 : const char *pszDefault = NULL ) const;
300 : OGRErr SetExtension( const char *pszTargetKey,
301 : const char *pszName,
302 : const char *pszValue );
303 :
304 : int FindProjParm( const char *pszParameter,
305 : const OGR_SRSNode *poPROJCS=NULL ) const;
306 : OGRErr SetProjParm( const char *, double );
307 : double GetProjParm( const char *, double =0.0, OGRErr* = NULL ) const;
308 :
309 : OGRErr SetNormProjParm( const char *, double );
310 : double GetNormProjParm( const char *, double=0.0, OGRErr* =NULL)const;
311 :
312 : static int IsAngularParameter( const char * );
313 : static int IsLongitudeParameter( const char * );
314 : static int IsLinearParameter( const char * );
315 :
316 : /** Albers Conic Equal Area */
317 : OGRErr SetACEA( double dfStdP1, double dfStdP2,
318 : double dfCenterLat, double dfCenterLong,
319 : double dfFalseEasting, double dfFalseNorthing );
320 :
321 : /** Azimuthal Equidistant */
322 : OGRErr SetAE( double dfCenterLat, double dfCenterLong,
323 : double dfFalseEasting, double dfFalseNorthing );
324 :
325 : /** Bonne */
326 : OGRErr SetBonne( double dfStdP1, double dfCentralMeridian,
327 : double dfFalseEasting, double dfFalseNorthing );
328 :
329 : /** Cylindrical Equal Area */
330 : OGRErr SetCEA( double dfStdP1, double dfCentralMeridian,
331 : double dfFalseEasting, double dfFalseNorthing );
332 :
333 : /** Cassini-Soldner */
334 : OGRErr SetCS( double dfCenterLat, double dfCenterLong,
335 : double dfFalseEasting, double dfFalseNorthing );
336 :
337 : /** Equidistant Conic */
338 : OGRErr SetEC( double dfStdP1, double dfStdP2,
339 : double dfCenterLat, double dfCenterLong,
340 : double dfFalseEasting, double dfFalseNorthing );
341 :
342 : /** Eckert I-VI */
343 : OGRErr SetEckert( int nVariation, double dfCentralMeridian,
344 : double dfFalseEasting, double dfFalseNorthing );
345 :
346 : OGRErr SetEckertIV( double dfCentralMeridian,
347 : double dfFalseEasting, double dfFalseNorthing );
348 :
349 : OGRErr SetEckertVI( double dfCentralMeridian,
350 : double dfFalseEasting, double dfFalseNorthing );
351 :
352 : /** Equirectangular */
353 : OGRErr SetEquirectangular(double dfCenterLat, double dfCenterLong,
354 : double dfFalseEasting, double dfFalseNorthing );
355 : /** Equirectangular generalized form : */
356 : OGRErr SetEquirectangular2( double dfCenterLat, double dfCenterLong,
357 : double dfPseudoStdParallel1,
358 : double dfFalseEasting, double dfFalseNorthing );
359 :
360 : /** Geostationary Satellite */
361 : OGRErr SetGEOS( double dfCentralMeridian, double dfSatelliteHeight,
362 : double dfFalseEasting, double dfFalseNorthing );
363 :
364 : /** Goode Homolosine */
365 : OGRErr SetGH( double dfCentralMeridian,
366 : double dfFalseEasting, double dfFalseNorthing );
367 :
368 : /** Interrupted Goode Homolosine */
369 : OGRErr SetIGH();
370 :
371 : /** Gall Stereograpic */
372 : OGRErr SetGS( double dfCentralMeridian,
373 : double dfFalseEasting, double dfFalseNorthing );
374 :
375 : /** Gauss Schreiber Transverse Mercator */
376 : OGRErr SetGaussSchreiberTMercator(double dfCenterLat, double dfCenterLong,
377 : double dfScale,
378 : double dfFalseEasting, double dfFalseNorthing );
379 :
380 : /** Gnomonic */
381 : OGRErr SetGnomonic(double dfCenterLat, double dfCenterLong,
382 : double dfFalseEasting, double dfFalseNorthing );
383 :
384 : /** Hotine Oblique Mercator */
385 : OGRErr SetHOM( double dfCenterLat, double dfCenterLong,
386 : double dfAzimuth, double dfRectToSkew,
387 : double dfScale,
388 : double dfFalseEasting, double dfFalseNorthing );
389 :
390 : OGRErr SetHOM2PNO( double dfCenterLat,
391 : double dfLat1, double dfLong1,
392 : double dfLat2, double dfLong2,
393 : double dfScale,
394 : double dfFalseEasting, double dfFalseNorthing );
395 :
396 : /** International Map of the World Polyconic */
397 : OGRErr SetIWMPolyconic( double dfLat1, double dfLat2,
398 : double dfCenterLong,
399 : double dfFalseEasting,
400 : double dfFalseNorthing );
401 :
402 : /** Krovak Oblique Conic Conformal */
403 : OGRErr SetKrovak( double dfCenterLat, double dfCenterLong,
404 : double dfAzimuth, double dfPseudoStdParallelLat,
405 : double dfScale,
406 : double dfFalseEasting, double dfFalseNorthing );
407 :
408 : /** Lambert Azimuthal Equal-Area */
409 : OGRErr SetLAEA( double dfCenterLat, double dfCenterLong,
410 : double dfFalseEasting, double dfFalseNorthing );
411 :
412 : /** Lambert Conformal Conic */
413 : OGRErr SetLCC( double dfStdP1, double dfStdP2,
414 : double dfCenterLat, double dfCenterLong,
415 : double dfFalseEasting, double dfFalseNorthing );
416 :
417 : /** Lambert Conformal Conic 1SP */
418 : OGRErr SetLCC1SP( double dfCenterLat, double dfCenterLong,
419 : double dfScale,
420 : double dfFalseEasting, double dfFalseNorthing );
421 :
422 : /** Lambert Conformal Conic (Belgium) */
423 : OGRErr SetLCCB( double dfStdP1, double dfStdP2,
424 : double dfCenterLat, double dfCenterLong,
425 : double dfFalseEasting, double dfFalseNorthing );
426 :
427 : /** Miller Cylindrical */
428 : OGRErr SetMC( double dfCenterLat, double dfCenterLong,
429 : double dfFalseEasting, double dfFalseNorthing );
430 :
431 : /** Mercator */
432 : OGRErr SetMercator( double dfCenterLat, double dfCenterLong,
433 : double dfScale,
434 : double dfFalseEasting, double dfFalseNorthing );
435 :
436 : OGRErr SetMercator2SP( double dfStdP1,
437 : double dfCenterLat, double dfCenterLong,
438 : double dfFalseEasting, double dfFalseNorthing );
439 :
440 : /** Mollweide */
441 : OGRErr SetMollweide( double dfCentralMeridian,
442 : double dfFalseEasting, double dfFalseNorthing );
443 :
444 : /** New Zealand Map Grid */
445 : OGRErr SetNZMG( double dfCenterLat, double dfCenterLong,
446 : double dfFalseEasting, double dfFalseNorthing );
447 :
448 : /** Oblique Stereographic */
449 : OGRErr SetOS( double dfOriginLat, double dfCMeridian,
450 : double dfScale,
451 : double dfFalseEasting,double dfFalseNorthing);
452 :
453 : /** Orthographic */
454 : OGRErr SetOrthographic( double dfCenterLat, double dfCenterLong,
455 : double dfFalseEasting,double dfFalseNorthing);
456 :
457 : /** Polyconic */
458 : OGRErr SetPolyconic( double dfCenterLat, double dfCenterLong,
459 : double dfFalseEasting, double dfFalseNorthing );
460 :
461 : /** Polar Stereographic */
462 : OGRErr SetPS( double dfCenterLat, double dfCenterLong,
463 : double dfScale,
464 : double dfFalseEasting, double dfFalseNorthing);
465 :
466 : /** Robinson */
467 : OGRErr SetRobinson( double dfCenterLong,
468 : double dfFalseEasting, double dfFalseNorthing );
469 :
470 : /** Sinusoidal */
471 : OGRErr SetSinusoidal( double dfCenterLong,
472 : double dfFalseEasting, double dfFalseNorthing );
473 :
474 : /** Stereographic */
475 : OGRErr SetStereographic( double dfCenterLat, double dfCenterLong,
476 : double dfScale,
477 : double dfFalseEasting,double dfFalseNorthing);
478 :
479 : /** Swiss Oblique Cylindrical */
480 : OGRErr SetSOC( double dfLatitudeOfOrigin, double dfCentralMeridian,
481 : double dfFalseEasting, double dfFalseNorthing );
482 :
483 : /** Transverse Mercator */
484 : OGRErr SetTM( double dfCenterLat, double dfCenterLong,
485 : double dfScale,
486 : double dfFalseEasting, double dfFalseNorthing );
487 :
488 : /** Transverse Mercator variants. */
489 : OGRErr SetTMVariant( const char *pszVariantName,
490 : double dfCenterLat, double dfCenterLong,
491 : double dfScale,
492 : double dfFalseEasting, double dfFalseNorthing );
493 :
494 : /** Tunesia Mining Grid */
495 : OGRErr SetTMG( double dfCenterLat, double dfCenterLong,
496 : double dfFalseEasting, double dfFalseNorthing );
497 :
498 : /** Transverse Mercator (South Oriented) */
499 : OGRErr SetTMSO( double dfCenterLat, double dfCenterLong,
500 : double dfScale,
501 : double dfFalseEasting, double dfFalseNorthing );
502 :
503 : /** Two Point Equidistant */
504 : OGRErr SetTPED( double dfLat1, double dfLong1,
505 : double dfLat2, double dfLong2,
506 : double dfFalseEasting, double dfFalseNorthing );
507 :
508 : /** VanDerGrinten */
509 : OGRErr SetVDG( double dfCenterLong,
510 : double dfFalseEasting, double dfFalseNorthing );
511 :
512 : /** Universal Transverse Mercator */
513 : OGRErr SetUTM( int nZone, int bNorth = TRUE );
514 : int GetUTMZone( int *pbNorth = NULL ) const;
515 :
516 : /** Wagner I -- VII */
517 : OGRErr SetWagner( int nVariation, double dfCenterLat,
518 : double dfFalseEasting, double dfFalseNorthing );
519 :
520 : /** State Plane */
521 : OGRErr SetStatePlane( int nZone, int bNAD83 = TRUE,
522 : const char *pszOverrideUnitName = NULL,
523 : double dfOverrideUnit = 0.0 );
524 :
525 : OGRErr ImportFromESRIStatePlaneWKT(
526 : int nCode, const char* pszDatumName, const char* pszUnitsName,
527 : int nPCSCode, const char* pszCSName = 0 );
528 : OGRErr ImportFromESRIWisconsinWKT(
529 : const char* pszPrjName, double dfCentralMeridian, double dfLatOfOrigin,
530 : const char* pszUnitsName, const char* pszCSName = 0 );
531 : };
532 :
533 : /************************************************************************/
534 : /* OGRCoordinateTransformation */
535 : /* */
536 : /* This is really just used as a base class for a private */
537 : /* implementation. */
538 : /************************************************************************/
539 :
540 : /**
541 : * Interface for transforming between coordinate systems.
542 : *
543 : * Currently, the only implementation within OGR is OGRProj4CT, which
544 : * requires the PROJ.4 library to be available at run-time.
545 : *
546 : * Also, see OGRCreateCoordinateTransformation() for creating transformations.
547 : */
548 :
549 : class CPL_DLL OGRCoordinateTransformation
550 247 : {
551 : public:
552 247 : virtual ~OGRCoordinateTransformation() {}
553 :
554 : static void DestroyCT(OGRCoordinateTransformation* poCT);
555 :
556 : // From CT_CoordinateTransformation
557 :
558 : /** Fetch internal source coordinate system. */
559 : virtual OGRSpatialReference *GetSourceCS() = 0;
560 :
561 : /** Fetch internal target coordinate system. */
562 : virtual OGRSpatialReference *GetTargetCS() = 0;
563 :
564 : // From CT_MathTransform
565 :
566 : /**
567 : * Transform points from source to destination space.
568 : *
569 : * This method is the same as the C function OCTTransform().
570 : *
571 : * The method TransformEx() allows extended success information to
572 : * be captured indicating which points failed to transform.
573 : *
574 : * @param nCount number of points to transform.
575 : * @param x array of nCount X vertices, modified in place.
576 : * @param y array of nCount Y vertices, modified in place.
577 : * @param z array of nCount Z vertices, modified in place.
578 : * @return TRUE on success, or FALSE if some or all points fail to
579 : * transform.
580 : */
581 : virtual int Transform( int nCount,
582 : double *x, double *y, double *z = NULL ) = 0;
583 :
584 : /**
585 : * Transform points from source to destination space.
586 : *
587 : * This method is the same as the C function OCTTransformEx().
588 : *
589 : * @param nCount number of points to transform.
590 : * @param x array of nCount X vertices, modified in place.
591 : * @param y array of nCount Y vertices, modified in place.
592 : * @param z array of nCount Z vertices, modified in place.
593 : * @param pabSuccess array of per-point flags set to TRUE if that point
594 : * transforms, or FALSE if it does not.
595 : *
596 : * @return TRUE if some or all points transform successfully, or FALSE if
597 : * if none transform.
598 : */
599 : virtual int TransformEx( int nCount,
600 : double *x, double *y, double *z = NULL,
601 : int *pabSuccess = NULL ) = 0;
602 :
603 : };
604 :
605 : OGRCoordinateTransformation CPL_DLL *
606 : OGRCreateCoordinateTransformation( OGRSpatialReference *poSource,
607 : OGRSpatialReference *poTarget );
608 :
609 : #endif /* ndef _OGR_SPATIALREF_H_INCLUDED */
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