GRASS GIS 7 Programmer's Manual  7.7.svn(2018)-r73666
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convert.c
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1 
2 /*!
3  \file lib/proj/convert.c
4 
5  \brief GProj Library - Functions for manipulating co-ordinate
6  system representations
7 
8  (C) 2003-2018 by the GRASS Development Team
9 
10  This program is free software under the GNU General Public License
11  (>=v2). Read the file COPYING that comes with GRASS for details.
12 
13  \author Paul Kelly, Frank Warmerdam, Markus Metz
14 */
15 
16 #include <grass/config.h>
17 
18 #include <stdio.h>
19 #include <stdlib.h>
20 #include <string.h>
21 #include <math.h>
22 #include <grass/gis.h>
23 #include <grass/gprojects.h>
24 #include <grass/glocale.h>
25 
26 #ifdef HAVE_OGR
27 #include <cpl_csv.h>
28 #include "local_proto.h"
29 
30 /* GRASS relative location of OGR co-ordinate system lookup tables */
31 #define CSVDIR "/etc/proj/ogr_csv"
32 
33 static void DatumNameMassage(char **);
34 #endif
35 
36 /* from proj-5.0.0/src/pj_units.c */
37 struct gpj_units {
38  char *id; /* units keyword */
39  char *to_meter; /* multiply by value to get meters */
40  char *name; /* comments */
41  double factor; /* to_meter factor in actual numbers */
42 };
43 
44 struct gpj_units
45 gpj_units[] = {
46  {"km", "1000.", "Kilometer", 1000.0},
47  {"m", "1.", "Meter", 1.0},
48  {"dm", "1/10", "Decimeter", 0.1},
49  {"cm", "1/100", "Centimeter", 0.01},
50  {"mm", "1/1000", "Millimeter", 0.001},
51  {"kmi", "1852.0", "International Nautical Mile", 1852.0},
52  {"in", "0.0254", "International Inch", 0.0254},
53  {"ft", "0.3048", "International Foot", 0.3048},
54  {"yd", "0.9144", "International Yard", 0.9144},
55  {"mi", "1609.344", "International Statute Mile", 1609.344},
56  {"fath", "1.8288", "International Fathom", 1.8288},
57  {"ch", "20.1168", "International Chain", 20.1168},
58  {"link", "0.201168", "International Link", 0.201168},
59  {"us-in", "1./39.37", "U.S. Surveyor's Inch", 0.0254},
60  {"us-ft", "0.304800609601219", "U.S. Surveyor's Foot", 0.304800609601219},
61  {"us-yd", "0.914401828803658", "U.S. Surveyor's Yard", 0.914401828803658},
62  {"us-ch", "20.11684023368047", "U.S. Surveyor's Chain", 20.11684023368047},
63  {"us-mi", "1609.347218694437", "U.S. Surveyor's Statute Mile", 1609.347218694437},
64  {"ind-yd", "0.91439523", "Indian Yard", 0.91439523},
65  {"ind-ft", "0.30479841", "Indian Foot", 0.30479841},
66  {"ind-ch", "20.11669506", "Indian Chain", 20.11669506},
67  {NULL, NULL, NULL, 0.0}
68 };
69 
70 static char *grass_to_wkt(const struct Key_Value *proj_info,
71  const struct Key_Value *proj_units,
72  const struct Key_Value *proj_epsg,
73  int esri_style, int prettify)
74 {
75 #ifdef HAVE_OGR
76  OGRSpatialReferenceH hSRS;
77  char *wkt, *local_wkt;
78 
79  hSRS = GPJ_grass_to_osr2(proj_info, proj_units, proj_epsg);
80 
81  if (hSRS == NULL)
82  return NULL;
83 
84  if (esri_style)
85  OSRMorphToESRI(hSRS);
86 
87  if (prettify)
88  OSRExportToPrettyWkt(hSRS, &wkt, 0);
89  else
90  OSRExportToWkt(hSRS, &wkt);
91 
92  local_wkt = G_store(wkt);
93  CPLFree(wkt);
94  OSRDestroySpatialReference(hSRS);
95 
96  return local_wkt;
97 #else
98  G_warning(_("GRASS is not compiled with OGR support"));
99  return NULL;
100 #endif
101 }
102 
103 /*!
104  * \brief Converts a GRASS co-ordinate system representation to WKT style.
105  *
106  * Takes a GRASS co-ordinate system as specified by two sets of
107  * key/value pairs derived from the PROJ_INFO and PROJ_UNITS files,
108  * and converts it to the 'Well Known Text' format.
109  *
110  * \param proj_info Set of GRASS PROJ_INFO key/value pairs
111  * \param proj_units Set of GRASS PROJ_UNIT key/value pairs
112  * \param esri_style boolean Output ESRI-style WKT (Use OSRMorphToESRI()
113  * function provided by OGR library)
114  * \param prettify boolean Use linebreaks and indents to 'prettify' output
115  * WKT string (Use OSRExportToPrettyWkt() function in OGR)
116  *
117  * \return Pointer to a string containing the co-ordinate system in
118  * WKT format
119  * \return NULL on error
120  */
121 char *GPJ_grass_to_wkt(const struct Key_Value *proj_info,
122  const struct Key_Value *proj_units,
123  int esri_style, int prettify)
124 {
125  return grass_to_wkt(proj_info, proj_units, NULL, esri_style, prettify);
126 }
127 
128 /*!
129  * \brief Converts a GRASS co-ordinate system representation to WKT
130  * style. EPSG code is preferred if available.
131  *
132  * Takes a GRASS co-ordinate system as specified key/value pairs
133  * derived from the PROJ_EPSG file. TOWGS84 parameter is scanned
134  * from PROJ_INFO file and appended to co-ordinate system definition
135  * imported from EPSG code by GDAL library. PROJ_UNITS file is
136  * ignored. The function converts it to the 'Well Known Text' format.
137  *
138  * \todo Merge with GPJ_grass_to_wkt() in GRASS 8.
139  *
140  * \param proj_info Set of GRASS PROJ_INFO key/value pairs
141  * \param proj_units Set of GRASS PROJ_UNIT key/value pairs
142  * \param proj_epsg Set of GRASS PROJ_EPSG key/value pairs
143  * \param esri_style boolean Output ESRI-style WKT (Use OSRMorphToESRI()
144  * function provided by OGR library)
145  * \param prettify boolean Use linebreaks and indents to 'prettify' output
146  * WKT string (Use OSRExportToPrettyWkt() function in OGR)
147  *
148  * \return Pointer to a string containing the co-ordinate system in
149  * WKT format
150  * \return NULL on error
151  */
152 char *GPJ_grass_to_wkt2(const struct Key_Value *proj_info,
153  const struct Key_Value *proj_units,
154  const struct Key_Value *proj_epsg,
155  int esri_style, int prettify)
156 {
157  return grass_to_wkt(proj_info, proj_units, proj_epsg, esri_style, prettify);
158 }
159 
160 #ifdef HAVE_OGR
161 /*!
162  * \brief Converts a GRASS co-ordinate system to an OGRSpatialReferenceH object.
163  *
164  * \param proj_info Set of GRASS PROJ_INFO key/value pairs
165  * \param proj_units Set of GRASS PROJ_UNIT key/value pairs
166  *
167  * \return OGRSpatialReferenceH object representing the co-ordinate system
168  * defined by proj_info and proj_units or NULL if it fails
169  */
170 OGRSpatialReferenceH GPJ_grass_to_osr(const struct Key_Value * proj_info,
171  const struct Key_Value * proj_units)
172 {
173  struct pj_info pjinfo;
174  char *proj4, *proj4mod, *wkt, *modwkt, *startmod, *lastpart;
175  OGRSpatialReferenceH hSRS, hSRS2;
176  OGRErr errcode;
177  struct gpj_datum dstruct;
178  struct gpj_ellps estruct;
179  size_t len;
180  const char *ellpskv, *unit, *unfact;
181  char *ellps, *ellpslong, *datum, *params, *towgs84, *datumlongname,
182  *start, *end;
183  const char *sysname, *osrunit, *osrunfact;
184  double a, es, rf;
185  int haveparams = 0;
186 
187  if ((proj_info == NULL) || (proj_units == NULL))
188  return NULL;
189 
190  hSRS = OSRNewSpatialReference(NULL);
191 
192  /* create PROJ structure from GRASS key/value pairs */
193  if (pj_get_kv(&pjinfo, proj_info, proj_units) < 0) {
194  G_warning(_("Unable parse GRASS PROJ_INFO file"));
195  return NULL;
196  }
197 
198  /* fetch the PROJ definition */
199  /* TODO: get the PROJ definition as used by pj_get_kv() */
200  if ((proj4 = pjinfo.def) == NULL) {
201  G_warning(_("Unable get PROJ.4-style parameter string"));
202  return NULL;
203  }
204 #ifdef HAVE_PROJ_H
205  proj_destroy(pjinfo.pj);
206 #else
207  pj_free(pjinfo.pj);
208 #endif
209 
210  unit = G_find_key_value("unit", proj_units);
211  unfact = G_find_key_value("meters", proj_units);
212  if (unfact != NULL && (strcmp(pjinfo.proj, "ll") != 0))
213  G_asprintf(&proj4mod, "%s +to_meter=%s", proj4, unfact);
214  else
215  proj4mod = G_store(proj4);
216 
217  /* create GDAL OSR from proj string */
218  if ((errcode = OSRImportFromProj4(hSRS, proj4mod)) != OGRERR_NONE) {
219  G_warning(_("OGR can't parse PROJ.4-style parameter string: "
220  "%s (OGR Error code was %d)"), proj4mod, errcode);
221  return NULL;
222  }
223  G_free(proj4mod);
224 
225  /* this messes up PROJCS versus GEOGCS!
226  sysname = G_find_key_value("name", proj_info);
227  if (sysname)
228  OSRSetProjCS(hSRS, sysname);
229  */
230 
231  if ((errcode = OSRExportToWkt(hSRS, &wkt)) != OGRERR_NONE) {
232  G_warning(_("OGR can't get WKT-style parameter string "
233  "(OGR Error code was %d)"), errcode);
234  return NULL;
235  }
236 
237  ellpskv = G_find_key_value("ellps", proj_info);
238  GPJ__get_ellipsoid_params(proj_info, &a, &es, &rf);
239  haveparams = GPJ__get_datum_params(proj_info, &datum, &params);
240 
241  if (ellpskv != NULL)
242  ellps = G_store(ellpskv);
243  else
244  ellps = NULL;
245 
246  if ((datum == NULL) || (GPJ_get_datum_by_name(datum, &dstruct) < 0)) {
247  datumlongname = G_store("unknown");
248  if (ellps == NULL)
249  ellps = G_store("unnamed");
250  }
251  else {
252  datumlongname = G_store(dstruct.longname);
253  if (ellps == NULL)
254  ellps = G_store(dstruct.ellps);
255  GPJ_free_datum(&dstruct);
256  }
257  G_debug(3, "GPJ_grass_to_osr: datum: <%s>", datum);
258  G_free(datum);
259  if (GPJ_get_ellipsoid_by_name(ellps, &estruct) > 0) {
260  ellpslong = G_store(estruct.longname);
261  DatumNameMassage(&ellpslong);
262  GPJ_free_ellps(&estruct);
263  }
264  else
265  ellpslong = G_store(ellps);
266 
267  startmod = strstr(wkt, "GEOGCS");
268  lastpart = strstr(wkt, "PRIMEM");
269  len = strlen(wkt) - strlen(startmod);
270  wkt[len] = '\0';
271  if (haveparams == 2) {
272  /* Only put datum params into the WKT if they were specifically
273  * specified in PROJ_INFO */
274  char *paramkey, *paramvalue;
275 
276  paramkey = strtok(params, "=");
277  paramvalue = params + strlen(paramkey) + 1;
278  if (G_strcasecmp(paramkey, "towgs84") == 0)
279  G_asprintf(&towgs84, ",TOWGS84[%s]", paramvalue);
280  else
281  towgs84 = G_store("");
282  G_free(params);
283  }
284  else
285  towgs84 = G_store("");
286 
287  sysname = OSRGetAttrValue(hSRS, "PROJCS", 0);
288  if (sysname == NULL) {
289  /* Not a projected co-ordinate system */
290  start = G_store("");
291  end = G_store("");
292  }
293  else {
294  if ((strcmp(sysname, "unnamed") == 0) &&
295  (G_find_key_value("name", proj_info) != NULL))
296  G_asprintf(&start, "PROJCS[\"%s\",",
297  G_find_key_value("name", proj_info));
298  else
299  start = G_store(wkt);
300 
301  osrunit = OSRGetAttrValue(hSRS, "UNIT", 0);
302  osrunfact = OSRGetAttrValue(hSRS, "UNIT", 1);
303 
304  if ((unfact == NULL) || (G_strcasecmp(osrunit, "unknown") != 0))
305  end = G_store("");
306  else {
307  char *buff;
308  double unfactf = atof(unfact);
309 
310  G_asprintf(&buff, ",UNIT[\"%s\",", osrunit);
311 
312  startmod = strstr(lastpart, buff);
313  len = strlen(lastpart) - strlen(startmod);
314  lastpart[len] = '\0';
315  G_free(buff);
316 
317  if (unit == NULL)
318  unit = "unknown";
319  G_asprintf(&end, ",UNIT[\"%s\",%.16g]]", unit, unfactf);
320  }
321 
322  }
323  OSRDestroySpatialReference(hSRS);
324  G_asprintf(&modwkt,
325  "%sGEOGCS[\"%s\",DATUM[\"%s\",SPHEROID[\"%s\",%.16g,%.16g]%s],%s%s",
326  start, ellps, datumlongname, ellpslong, a, rf, towgs84,
327  lastpart, end);
328  hSRS2 = OSRNewSpatialReference(modwkt);
329  G_free(modwkt);
330 
331  CPLFree(wkt);
332  G_free(start);
333  G_free(ellps);
334  G_free(datumlongname);
335  G_free(ellpslong);
336  G_free(towgs84);
337  G_free(end);
338 
339  return hSRS2;
340 }
341 
342 /*!
343  * \brief Converts a GRASS co-ordinate system to an
344  * OGRSpatialReferenceH object. EPSG code is preferred if available.
345  *
346  * The co-ordinate system definition is imported from EPSG (by GDAL)
347  * definition if available. TOWGS84 parameter is scanned from
348  * PROJ_INFO file and appended to co-ordinate system definition. If
349  * EPSG code is not available, PROJ_INFO file is used as
350  * GPJ_grass_to_osr() does.
351 
352  * \todo Merge with GPJ_grass_to_osr() in GRASS 8.
353  *
354  * \param proj_info Set of GRASS PROJ_INFO key/value pairs
355  * \param proj_units Set of GRASS PROJ_UNIT key/value pairs
356  * \param proj_epsg Set of GRASS PROJ_EPSG key/value pairs
357  *
358  * \return OGRSpatialReferenceH object representing the co-ordinate system
359  * defined by proj_info and proj_units or NULL if it fails
360  */
361 OGRSpatialReferenceH GPJ_grass_to_osr2(const struct Key_Value * proj_info,
362  const struct Key_Value * proj_units,
363  const struct Key_Value * proj_epsg)
364 {
365  int epsgcode = 0;
366 
367  if (proj_epsg) {
368  const char *epsgstr = G_find_key_value("epsg", proj_epsg);
369  if (epsgstr)
370  epsgcode = atoi(epsgstr);
371  }
372 
373  if (epsgcode) {
374  const char *towgs84;
375  OGRSpatialReferenceH hSRS;
376 
377  hSRS = OSRNewSpatialReference(NULL);
378 
379  OSRImportFromEPSG(hSRS, epsgcode);
380 
381  /* take +towgs84 from projinfo file if defined */
382  towgs84 = G_find_key_value("towgs84", proj_info);
383  if (towgs84) {
384  char **tokens;
385  int i;
386  double df[] = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0};
387 
388  tokens = G_tokenize(towgs84, ",");
389 
390  for (i = 0; i < G_number_of_tokens(tokens); i++)
391  df[i] = atof(tokens[i]);
392  G_free_tokens(tokens);
393 
394  OSRSetTOWGS84(hSRS, df[0], df[1], df[2], df[3], df[4], df[5], df[6]);
395  }
396 
397  return hSRS;
398  }
399 
400  return GPJ_grass_to_osr(proj_info, proj_units);
401 }
402 
403 /*!
404  * \brief Converts an OGRSpatialReferenceH object to a GRASS co-ordinate system.
405  *
406  * \param cellhd Pointer to a GRASS Cell_head structure that will have its
407  * projection-related members populated with appropriate values
408  * \param projinfo Pointer to a pointer which will have a GRASS Key_Value
409  * structure allocated containing a set of GRASS PROJ_INFO values
410  * \param projunits Pointer to a pointer which will have a GRASS Key_Value
411  * structure allocated containing a set of GRASS PROJ_UNITS values
412  * \param hSRS OGRSpatialReferenceH object containing the co-ordinate
413  * system to be converted
414  * \param datumtrans Index number of datum parameter set to use, 0 to leave
415  * unspecified
416  *
417  * \return 2 if a projected or lat/long co-ordinate system has been
418  * defined
419  * \return 1 if an unreferenced XY co-ordinate system has
420  * been defined
421  */
422 int GPJ_osr_to_grass(struct Cell_head *cellhd, struct Key_Value **projinfo,
423  struct Key_Value **projunits, OGRSpatialReferenceH hSRS1,
424  int datumtrans)
425 {
426  struct Key_Value *temp_projinfo;
427  char *pszProj4 = NULL, *pszRemaining;
428  char *pszProj = NULL;
429  const char *pszProjCS = NULL;
430  char *datum = NULL;
431  char *proj4_unit = NULL;
432  struct gpj_datum dstruct;
433  const char *ograttr;
434  OGRSpatialReferenceH hSRS;
435 
436  *projinfo = NULL;
437  *projunits = NULL;
438 
439  hSRS = hSRS1;
440 
441  if (hSRS == NULL)
442  goto default_to_xy;
443 
444  /* Set finder function for locating OGR csv co-ordinate system tables */
445  /* SetCSVFilenameHook(GPJ_set_csv_loc); */
446 
447  /* Hopefully this doesn't do any harm if it wasn't in ESRI format
448  * to start with... */
449  OSRMorphFromESRI(hSRS);
450 
451  *projinfo = G_create_key_value();
452 
453  /* use proj4 definition from EXTENSION attribute if existing */
454  ograttr = OSRGetAttrValue(hSRS, "EXTENSION", 0);
455  if (ograttr && *ograttr && strcmp(ograttr, "PROJ4") == 0) {
456  ograttr = OSRGetAttrValue(hSRS, "EXTENSION", 1);
457  G_debug(3, "proj4 extension:");
458  G_debug(3, "%s", ograttr);
459 
460  if (ograttr && *ograttr) {
461  char *proj4ext;
462  OGRSpatialReferenceH hSRS2;
463 
464  hSRS2 = OSRNewSpatialReference(NULL);
465  proj4ext = G_store(ograttr);
466 
467  /* test */
468  if (OSRImportFromProj4(hSRS2, proj4ext) != OGRERR_NONE) {
469  G_warning(_("Updating spatial reference with embedded proj4 definition failed. "
470  "Proj4 definition: <%s>"), proj4ext);
471  OSRDestroySpatialReference(hSRS2);
472  }
473  else {
474  /* use new OGR spatial reference defined with embedded proj4 string */
475  /* TODO: replace warning with important_message once confirmed working */
476  G_warning(_("Updating spatial reference with embedded proj4 definition"));
477 
478  /* -------------------------------------------------------------------- */
479  /* Derive the user name for the coordinate system. */
480  /* -------------------------------------------------------------------- */
481  pszProjCS = OSRGetAttrValue(hSRS, "PROJCS", 0);
482  if (!pszProjCS)
483  pszProjCS = OSRGetAttrValue(hSRS, "GEOGCS", 0);
484 
485  if (pszProjCS) {
486  G_set_key_value("name", pszProjCS, *projinfo);
487  }
488  else if (pszProj) {
489  char path[4095];
490  char name[80];
491 
492  /* use name of the projection as name for the coordinate system */
493 
494  sprintf(path, "%s/etc/proj/projections", G_gisbase());
495  if (G_lookup_key_value_from_file(path, pszProj, name, sizeof(name)) >
496  0)
497  G_set_key_value("name", name, *projinfo);
498  else
499  G_set_key_value("name", pszProj, *projinfo);
500  }
501 
502  /* the original hSRS1 is left as is, ok? */
503  hSRS = hSRS2;
504  }
505  G_free(proj4ext);
506  }
507  }
508 
509  /* -------------------------------------------------------------------- */
510  /* Set cellhd for well known coordinate systems. */
511  /* -------------------------------------------------------------------- */
512  if (!OSRIsGeographic(hSRS) && !OSRIsProjected(hSRS))
513  goto default_to_xy;
514 
515  if (cellhd) {
516  int bNorth;
517 
518  if (OSRIsGeographic(hSRS)) {
519  cellhd->proj = PROJECTION_LL;
520  cellhd->zone = 0;
521  }
522  else if (OSRGetUTMZone(hSRS, &bNorth) != 0) {
523  cellhd->proj = PROJECTION_UTM;
524  cellhd->zone = OSRGetUTMZone(hSRS, &bNorth);
525  if (!bNorth)
526  cellhd->zone *= -1;
527  }
528  else {
529  cellhd->proj = PROJECTION_OTHER;
530  cellhd->zone = 0;
531  }
532  }
533 
534  /* -------------------------------------------------------------------- */
535  /* Get the coordinate system definition in PROJ.4 format. */
536  /* -------------------------------------------------------------------- */
537  if (OSRExportToProj4(hSRS, &pszProj4) != OGRERR_NONE)
538  goto default_to_xy;
539 
540  /* -------------------------------------------------------------------- */
541  /* Parse the PROJ.4 string into key/value pairs. Do a bit of */
542  /* extra work to "GRASSify" the result. */
543  /* -------------------------------------------------------------------- */
544  temp_projinfo = G_create_key_value();
545 
546  /* Create "local" copy of proj4 string so we can modify and free it
547  * using GRASS functions */
548  pszRemaining = G_store(pszProj4);
549  CPLFree(pszProj4);
550  pszProj4 = pszRemaining;
551  while ((pszRemaining = strstr(pszRemaining, "+")) != NULL) {
552  char *pszToken, *pszValue;
553 
554  pszRemaining++;
555 
556  /* Advance pszRemaining to end of this token[=value] pair */
557  pszToken = pszRemaining;
558  while (*pszRemaining != ' ' && *pszRemaining != '\0')
559  pszRemaining++;
560 
561  if (*pszRemaining == ' ') {
562  *pszRemaining = '\0';
563  pszRemaining++;
564  }
565 
566  /* parse token, and value */
567  if (strstr(pszToken, "=") != NULL) {
568  pszValue = strstr(pszToken, "=");
569  *pszValue = '\0';
570  pszValue++;
571  }
572  else
573  pszValue = "defined";
574 
575  /* projection name */
576  if (G_strcasecmp(pszToken, "proj") == 0) {
577  /* The ll projection is known as longlat in PROJ.4 */
578  if (G_strcasecmp(pszValue, "longlat") == 0)
579  pszValue = "ll";
580 
581  pszProj = pszValue;
582  }
583 
584  /* discard @null nadgrids */
585  if (G_strcasecmp(pszToken, "nadgrids") == 0 &&
586  G_strcasecmp(pszValue, "@null") == 0)
587  continue;
588 
589  /* Ellipsoid and datum handled separately below */
590  if (G_strcasecmp(pszToken, "ellps") == 0
591  || G_strcasecmp(pszToken, "a") == 0
592  || G_strcasecmp(pszToken, "b") == 0
593  || G_strcasecmp(pszToken, "es") == 0
594  || G_strcasecmp(pszToken, "rf") == 0
595  || G_strcasecmp(pszToken, "datum") == 0)
596  continue;
597 
598  /* We will handle units separately */
599  if (G_strcasecmp(pszToken, "to_meter") == 0)
600  continue;
601 
602  if (G_strcasecmp(pszToken, "units") == 0) {
603  proj4_unit = G_store(pszValue);
604  continue;
605  }
606 
607  G_set_key_value(pszToken, pszValue, temp_projinfo);
608  }
609  if (!pszProj)
610  G_warning(_("No projection name! Projection parameters likely to be meaningless."));
611 
612  /* -------------------------------------------------------------------- */
613  /* Derive the user name for the coordinate system. */
614  /* -------------------------------------------------------------------- */
615  if (!G_find_key_value("name", *projinfo)) {
616  pszProjCS = OSRGetAttrValue(hSRS, "PROJCS", 0);
617  if (!pszProjCS)
618  pszProjCS = OSRGetAttrValue(hSRS, "GEOGCS", 0);
619 
620  if (pszProjCS) {
621  G_set_key_value("name", pszProjCS, *projinfo);
622  }
623  else if (pszProj) {
624  char path[4095];
625  char name[80];
626 
627  /* use name of the projection as name for the coordinate system */
628 
629  sprintf(path, "%s/etc/proj/projections", G_gisbase());
630  if (G_lookup_key_value_from_file(path, pszProj, name, sizeof(name)) >
631  0)
632  G_set_key_value("name", name, *projinfo);
633  else
634  G_set_key_value("name", pszProj, *projinfo);
635  }
636  }
637 
638  /* -------------------------------------------------------------------- */
639  /* Find the GRASS datum name and choose parameters either */
640  /* interactively or not. */
641  /* -------------------------------------------------------------------- */
642 
643  {
644  const char *pszDatumNameConst = OSRGetAttrValue(hSRS, "DATUM", 0);
645  struct datum_list *list, *listhead;
646  char *dum1, *dum2, *pszDatumName;
647  int paramspresent =
648  GPJ__get_datum_params(temp_projinfo, &dum1, &dum2);
649 
650  if (pszDatumNameConst) {
651  /* Need to make a new copy of the string so we don't mess
652  * around with the memory inside the OGRSpatialReferenceH? */
653 
654  pszDatumName = G_store(pszDatumNameConst);
655  DatumNameMassage(&pszDatumName);
656  G_debug(3, "GPJ_osr_to_grass: pszDatumNameConst: <%s>", pszDatumName);
657 
658  list = listhead = read_datum_table();
659 
660  while (list != NULL) {
661  if (G_strcasecmp(pszDatumName, list->longname) == 0) {
662  datum = G_store(list->name);
663  break;
664  }
665  list = list->next;
666  }
667  free_datum_list(listhead);
668 
669  if (datum == NULL) {
670  if (paramspresent < 2)
671  /* Only give warning if no parameters present */
672  G_warning(_("Datum <%s> not recognised by GRASS and no parameters found"),
673  pszDatumName);
674  }
675  else {
676  G_set_key_value("datum", datum, *projinfo);
677 
678  if (paramspresent < 2) {
679  /* If no datum parameters were imported from the OSR
680  * object then we should use the set specified by datumtrans */
681  char *params, *chosenparams = NULL;
682  int paramsets;
683 
684  paramsets =
685  GPJ_get_default_datum_params_by_name(datum, &params);
686 
687  if (paramsets < 0)
688  G_warning(_("Datum <%s> apparently recognised by GRASS but no parameters found. "
689  "You may want to look into this."), datum);
690  else if (datumtrans > paramsets) {
691 
692  G_warning(_("Invalid transformation number %d; valid range is 1 to %d. "
693  "Leaving datum transform parameters unspecified."),
694  datumtrans, paramsets);
695  datumtrans = 0;
696  }
697 
698  if (paramsets > 0) {
699  struct gpj_datum_transform_list *tlist, *old;
700 
701  tlist = GPJ_get_datum_transform_by_name(datum);
702 
703  if (tlist != NULL) {
704  do {
705  if (tlist->count == datumtrans)
706  chosenparams = G_store(tlist->params);
707  old = tlist;
708  tlist = tlist->next;
710  } while (tlist != NULL);
711  }
712  }
713 
714  if (chosenparams != NULL) {
715  char *paramkey, *paramvalue;
716 
717  paramkey = strtok(chosenparams, "=");
718  paramvalue = chosenparams + strlen(paramkey) + 1;
719  G_set_key_value(paramkey, paramvalue, *projinfo);
720  G_free(chosenparams);
721  }
722 
723  if (paramsets > 0)
724  G_free(params);
725  }
726 
727  }
728  G_free(pszDatumName);
729  }
730  }
731 
732  /* -------------------------------------------------------------------- */
733  /* Determine an appropriate GRASS ellipsoid name if possible, or */
734  /* else just put a and es values into PROJ_INFO */
735  /* -------------------------------------------------------------------- */
736 
737  if ((datum != NULL) && (GPJ_get_datum_by_name(datum, &dstruct) > 0)) {
738  /* Use ellps name associated with datum */
739  G_set_key_value("ellps", dstruct.ellps, *projinfo);
740  GPJ_free_datum(&dstruct);
741  G_free(datum);
742  }
743  else {
744  /* If we can't determine the ellipsoid from the datum, derive it
745  * directly from "SPHEROID" parameters in WKT */
746  const char *pszSemiMajor = OSRGetAttrValue(hSRS, "SPHEROID", 1);
747  const char *pszInvFlat = OSRGetAttrValue(hSRS, "SPHEROID", 2);
748 
749  if (pszSemiMajor != NULL && pszInvFlat != NULL) {
750  char *ellps = NULL;
751  struct ellps_list *list, *listhead;
752  double a = atof(pszSemiMajor), invflat = atof(pszInvFlat), flat;
753  double es;
754 
755  /* Allow for incorrect WKT describing a sphere where InvFlat
756  * is given as 0 rather than inf */
757  if (invflat > 0)
758  flat = 1 / invflat;
759  else
760  flat = 0;
761 
762  es = flat * (2.0 - flat);
763 
764  list = listhead = read_ellipsoid_table(0);
765 
766  while (list != NULL) {
767  /* Try and match a and es against GRASS defined ellipsoids;
768  * accept first one that matches. These numbers were found
769  * by trial and error and could be fine-tuned, or possibly
770  * a direct comparison of IEEE floating point values used. */
771  if ((a == list->a || fabs(a - list->a) < 0.1 || fabs(1 - a / list->a) < 0.0000001) &&
772  ((es == 0 && list->es == 0) ||
773  /* Special case for sphere */
774  (invflat == list->rf || fabs(invflat - list->rf) < 0.0000001))) {
775  ellps = G_store(list->name);
776  break;
777  }
778  list = list->next;
779  }
780  if (listhead != NULL)
781  free_ellps_list(listhead);
782 
783  if (ellps == NULL) {
784  /* If we weren't able to find a matching ellps name, set
785  * a and es values directly from WKT-derived data */
786  char es_str[100];
787 
788  G_set_key_value("a", (char *)pszSemiMajor, *projinfo);
789 
790  sprintf(es_str, "%.16g", es);
791  G_set_key_value("es", es_str, *projinfo);
792  }
793  else {
794  /* else specify the GRASS ellps name for readability */
795  G_set_key_value("ellps", ellps, *projinfo);
796  G_free(ellps);
797  }
798 
799  }
800 
801  }
802 
803  /* -------------------------------------------------------------------- */
804  /* Finally append the detailed projection parameters to the end */
805  /* -------------------------------------------------------------------- */
806 
807  {
808  int i;
809 
810  for (i = 0; i < temp_projinfo->nitems; i++)
811  G_set_key_value(temp_projinfo->key[i],
812  temp_projinfo->value[i], *projinfo);
813 
814  G_free_key_value(temp_projinfo);
815  }
816 
817  G_free(pszProj4);
818 
819  /* -------------------------------------------------------------------- */
820  /* Set the linear units. */
821  /* -------------------------------------------------------------------- */
822  *projunits = G_create_key_value();
823 
824  if (OSRIsGeographic(hSRS)) {
825  /* We assume degrees ... someday we will be wrong! */
826  G_set_key_value("unit", "degree", *projunits);
827  G_set_key_value("units", "degrees", *projunits);
828  G_set_key_value("meters", "1.0", *projunits);
829  }
830  else {
831  char szFormatBuf[256];
832  char *pszUnitsName = NULL;
833  double dfToMeters;
834  char *pszUnitsPlural, *pszStringEnd;
835 
836  dfToMeters = OSRGetLinearUnits(hSRS, &pszUnitsName);
837 
838  /* the unit name can be arbitrary: the following can be the same
839  * us-ft (proj.4 keyword)
840  * U.S. Surveyor's Foot (proj.4 name)
841  * US survey foot (WKT)
842  * Foot_US (WKT)
843  */
844 
845  /* Workaround for the most obvious case when unit name is unknown */
846  if ((G_strcasecmp(pszUnitsName, "unknown") == 0) &&
847  (dfToMeters == 1.))
848  G_asprintf(&pszUnitsName, "meter");
849 
850  if ((G_strcasecmp(pszUnitsName, "metre") == 0))
851  G_asprintf(&pszUnitsName, "meter");
852  if ((G_strcasecmp(pszUnitsName, "kilometre") == 0))
853  G_asprintf(&pszUnitsName, "kilometer");
854 
855  if (dfToMeters != 1. && proj4_unit) {
856  int i;
857 
858  i = 0;
859  while (gpj_units[i].id != NULL) {
860  if (strcmp(proj4_unit, gpj_units[i].id) == 0) {
861  G_asprintf(&pszUnitsName, "%s", gpj_units[i].name);
862  break;
863  }
864  i++;
865  }
866  }
867 
868  G_set_key_value("unit", pszUnitsName, *projunits);
869 
870  /* Attempt at plural formation (WKT format doesn't store plural
871  * form of unit name) */
872  pszUnitsPlural = G_malloc(strlen(pszUnitsName) + 3);
873  strcpy(pszUnitsPlural, pszUnitsName);
874  pszStringEnd = pszUnitsPlural + strlen(pszUnitsPlural) - 4;
875  if (G_strcasecmp(pszStringEnd, "foot") == 0) {
876  /* Special case for foot - change two o's to e's */
877  pszStringEnd[1] = 'e';
878  pszStringEnd[2] = 'e';
879  }
880  else if (G_strcasecmp(pszStringEnd, "inch") == 0) {
881  /* Special case for inch - add es */
882  pszStringEnd[4] = 'e';
883  pszStringEnd[5] = 's';
884  pszStringEnd[6] = '\0';
885  }
886  else {
887  /* For anything else add an s at the end */
888  pszStringEnd[4] = 's';
889  pszStringEnd[5] = '\0';
890  }
891 
892  G_set_key_value("units", pszUnitsPlural, *projunits);
893  G_free(pszUnitsPlural);
894 
895  sprintf(szFormatBuf, "%.16g", dfToMeters);
896  G_set_key_value("meters", szFormatBuf, *projunits);
897 
898  }
899 
900  if (hSRS != hSRS1)
901  OSRDestroySpatialReference(hSRS);
902 
903  return 2;
904 
905  /* -------------------------------------------------------------------- */
906  /* Fallback to returning an ungeoreferenced definition. */
907  /* -------------------------------------------------------------------- */
908  default_to_xy:
909  if (cellhd != NULL) {
910  cellhd->proj = PROJECTION_XY;
911  cellhd->zone = 0;
912  }
913  if (*projinfo)
914  G_free_key_value(*projinfo);
915 
916  *projinfo = NULL;
917  *projunits = NULL;
918 
919  if (hSRS != NULL && hSRS != hSRS1)
920  OSRDestroySpatialReference(hSRS);
921 
922  return 1;
923 }
924 #endif
925 
926 /*!
927  * \brief Converts a WKT projection description to a GRASS co-ordinate system.
928  *
929  * \param cellhd Pointer to a GRASS Cell_head structure that will have its
930  * projection-related members populated with appropriate values
931  * \param projinfo Pointer to a pointer which will have a GRASS Key_Value
932  * structure allocated containing a set of GRASS PROJ_INFO values
933  * \param projunits Pointer to a pointer which will have a GRASS Key_Value
934  * structure allocated containing a set of GRASS PROJ_UNITS values
935  * \param wkt Well-known Text (WKT) description of the co-ordinate
936  * system to be converted
937  * \param datumtrans Index number of datum parameter set to use, 0 to leave
938  * unspecified
939  *
940  * \return 2 if a projected or lat/long co-ordinate system has been
941  * defined
942  * \return 1 if an unreferenced XY co-ordinate system has
943  * been defined
944  * \return -1 on error
945  */
946 int GPJ_wkt_to_grass(struct Cell_head *cellhd, struct Key_Value **projinfo,
947  struct Key_Value **projunits, const char *wkt,
948  int datumtrans)
949 {
950 #ifdef HAVE_OGR
951  int retval;
952 
953  if (wkt == NULL)
954  retval =
955  GPJ_osr_to_grass(cellhd, projinfo, projunits, NULL, datumtrans);
956  else {
957  OGRSpatialReferenceH hSRS;
958 
959  /* Set finder function for locating OGR csv co-ordinate system tables */
960  /* SetCSVFilenameHook(GPJ_set_csv_loc); */
961 
962  hSRS = OSRNewSpatialReference(wkt);
963  retval =
964  GPJ_osr_to_grass(cellhd, projinfo, projunits, hSRS, datumtrans);
965  OSRDestroySpatialReference(hSRS);
966  }
967 
968  return retval;
969 #else
970  return -1;
971 #endif
972 }
973 
974 #ifdef HAVE_OGR
975 /* GPJ_set_csv_loc()
976  * 'finder function' for use with OGR SetCSVFilenameHook() function */
977 
978 const char *GPJ_set_csv_loc(const char *name)
979 {
980  const char *gisbase = G_gisbase();
981  static char *buf = NULL;
982 
983  if (buf != NULL)
984  G_free(buf);
985 
986  G_asprintf(&buf, "%s%s/%s", gisbase, CSVDIR, name);
987 
988  return buf;
989 }
990 
991 
992 /* The list below is only for files that use a non-standard name for a
993  * datum that is already supported in GRASS. The number of entries must be even;
994  * they are all in pairs. The first one in the pair is the non-standard name;
995  * the second is the GRASS/GDAL name. If a name appears more than once (as for
996  * European_Terrestrial_Reference_System_1989) then it means there was more
997  * than one non-standard name for it that needs to be accounted for.
998  *
999  * N.B. The order of these pairs is different from that in
1000  * ogr/ogrfromepsg.cpp in the GDAL source tree! GRASS uses the EPSG
1001  * names in its WKT representation except WGS_1984 and WGS_1972 as
1002  * these shortened versions seem to be standard.
1003  * Below order:
1004  * the equivalent name comes first in the pair, and
1005  * the EPSG name (as used in the GRASS datum.table file) comes second.
1006  *
1007  * The datum parameters are stored in
1008  * ../gis/datum.table # 3 parameters
1009  * ../gis/datumtransform.table # 7 parameters (requires entry in datum.table)
1010  *
1011  * Hint: use GDAL's "testepsg" to identify the canonical name, e.g.
1012  * testepsg epsg:4674
1013  */
1014 
1015 static const char *papszDatumEquiv[] = {
1016  "Militar_Geographische_Institute",
1017  "Militar_Geographische_Institut",
1018  "World_Geodetic_System_1984",
1019  "WGS_1984",
1020  "World_Geodetic_System_1972",
1021  "WGS_1972",
1022  "European_Terrestrial_Reference_System_89",
1023  "European_Terrestrial_Reference_System_1989",
1024  "European_Reference_System_1989",
1025  "European_Terrestrial_Reference_System_1989",
1026  "ETRS_1989",
1027  "European_Terrestrial_Reference_System_1989",
1028  "ETRS89",
1029  "European_Terrestrial_Reference_System_1989",
1030  "ETRF_1989",
1031  "European_Terrestrial_Reference_System_1989",
1032  "NZGD_2000",
1033  "New_Zealand_Geodetic_Datum_2000",
1034  "Monte_Mario_Rome",
1035  "Monte_Mario",
1036  "MONTROME",
1037  "Monte_Mario",
1038  "Campo_Inchauspe_1969",
1039  "Campo_Inchauspe",
1040  "S_JTSK",
1041  "System_Jednotne_Trigonometricke_Site_Katastralni",
1042  "S_JTSK_Ferro",
1043  "Militar_Geographische_Institut",
1044  "Potsdam_Datum_83",
1045  "Deutsches_Hauptdreiecksnetz",
1046  "South_American_1969",
1047  "South_American_Datum_1969",
1048  "ITRF_1992",
1049  "ITRF92",
1050  NULL
1051 };
1052 
1053 /************************************************************************/
1054 /* OGREPSGDatumNameMassage() */
1055 /* */
1056 /* Massage an EPSG datum name into WMT format. Also transform */
1057 /* specific exception cases into WKT versions. */
1058 
1059 /************************************************************************/
1060 
1061 static void DatumNameMassage(char **ppszDatum)
1062 {
1063  int i, j;
1064  char *pszDatum = *ppszDatum;
1065 
1066  G_debug(3, "DatumNameMassage: Raw string found <%s>", (char *)pszDatum);
1067  /* -------------------------------------------------------------------- */
1068  /* Translate non-alphanumeric values to underscores. */
1069  /* -------------------------------------------------------------------- */
1070  for (i = 0; pszDatum[i] != '\0'; i++) {
1071  if (!(pszDatum[i] >= 'A' && pszDatum[i] <= 'Z')
1072  && !(pszDatum[i] >= 'a' && pszDatum[i] <= 'z')
1073  && !(pszDatum[i] >= '0' && pszDatum[i] <= '9')) {
1074  pszDatum[i] = '_';
1075  }
1076  }
1077 
1078  /* -------------------------------------------------------------------- */
1079  /* Remove repeated and trailing underscores. */
1080  /* -------------------------------------------------------------------- */
1081  for (i = 1, j = 0; pszDatum[i] != '\0'; i++) {
1082  if (pszDatum[j] == '_' && pszDatum[i] == '_')
1083  continue;
1084 
1085  pszDatum[++j] = pszDatum[i];
1086  }
1087  if (pszDatum[j] == '_')
1088  pszDatum[j] = '\0';
1089  else
1090  pszDatum[j + 1] = '\0';
1091 
1092  /* -------------------------------------------------------------------- */
1093  /* Search for datum equivalences. Specific massaged names get */
1094  /* mapped to OpenGIS specified names. */
1095  /* -------------------------------------------------------------------- */
1096  G_debug(3, "DatumNameMassage: Search for datum equivalences of <%s>", (char *)pszDatum);
1097  for (i = 0; papszDatumEquiv[i] != NULL; i += 2) {
1098  if (EQUAL(*ppszDatum, papszDatumEquiv[i])) {
1099  G_free(*ppszDatum);
1100  *ppszDatum = G_store(papszDatumEquiv[i + 1]);
1101  break;
1102  }
1103  }
1104 }
1105 
1106 #endif /* HAVE_OGR */
int GPJ_wkt_to_grass(struct Cell_head *cellhd, struct Key_Value **projinfo, struct Key_Value **projunits, const char *wkt, int datumtrans)
Converts a WKT projection description to a GRASS co-ordinate system.
Definition: convert.c:946
int G_strcasecmp(const char *x, const char *y)
String compare ignoring case (upper or lower)
Definition: strings.c:46
const char * G_find_key_value(const char *key, const struct Key_Value *kv)
Find given key (case sensitive)
Definition: key_value1.c:84
void G_free(void *buf)
Free allocated memory.
Definition: gis/alloc.c:149
void GPJ_free_datum(struct gpj_datum *dstruct)
Free the memory used for the strings in a gpj_datum struct.
Definition: proj/datum.c:403
int GPJ__get_datum_params(const struct Key_Value *projinfo, char **datumname, char **params)
Extract the datum transformation-related parameters from a set of general PROJ_INFO parameters...
Definition: proj/datum.c:173
void GPJ_free_datum_transform(struct gpj_datum_transform_list *item)
Free the memory used by a gpj_datum_transform_list struct.
Definition: proj/datum.c:326
2D/3D raster map header (used also for region)
Definition: gis.h:390
struct ellps_list * read_ellipsoid_table(int fatal)
Definition: ellipse.c:224
char proj[100]
Definition: gprojects.h:52
char * GPJ_grass_to_wkt(const struct Key_Value *proj_info, const struct Key_Value *proj_units, int esri_style, int prettify)
Converts a GRASS co-ordinate system representation to WKT style.
Definition: convert.c:121
int old
Definition: raster3d/cats.c:84
char ** G_tokenize(const char *buf, const char *delim)
Tokenize string.
Definition: gis/token.c:48
char * G_store(const char *s)
Copy string to allocated memory.
Definition: strings.c:86
double a
Definition: gprojects.h:81
int G_asprintf(char **out, const char *fmt,...)
Definition: asprintf.c:70
#define PROJECTION_XY
Projection code - XY coordinate system (unreferenced data)
Definition: gis.h:93
char * GPJ_grass_to_wkt2(const struct Key_Value *proj_info, const struct Key_Value *proj_units, const struct Key_Value *proj_epsg, int esri_style, int prettify)
Converts a GRASS co-ordinate system representation to WKT style. EPSG code is preferred if available...
Definition: convert.c:152
#define NULL
Definition: ccmath.h:32
struct gpj_datum_transform_list * GPJ_get_datum_transform_by_name(const char *inputname)
Internal function to find all possible sets of transformation parameters for a particular datum...
Definition: proj/datum.c:237
int GPJ_get_datum_by_name(const char *name, struct gpj_datum *dstruct)
Look up a string in datum.table file to see if it is a valid datum name and if so place its informati...
Definition: proj/datum.c:37
void G_free_key_value(struct Key_Value *kv)
Free allocated Key_Value structure.
Definition: key_value1.c:103
struct gpj_units gpj_units[]
Definition: convert.c:45
int GPJ__get_ellipsoid_params(const struct Key_Value *proj_keys, double *a, double *e2, double *rf)
Get the ellipsoid parameters from proj keys structure.
Definition: ellipse.c:73
int G_lookup_key_value_from_file(const char *file, const char *key, char value[], int n)
Look up for key in file.
Definition: key_value4.c:48
#define PROJECTION_UTM
Projection code - UTM.
Definition: gis.h:95
int G_number_of_tokens(char **tokens)
Return number of tokens.
Definition: gis/token.c:185
projPJ pj
Definition: gprojects.h:48
#define PROJECTION_OTHER
Projection code - other projection (other then noted above)
Definition: gis.h:101
void free_datum_list(struct datum_list *dstruct)
Free the memory used by a datum_list linked list structure.
Definition: proj/datum.c:417
char * def
Definition: gprojects.h:53
char ** value
Definition: gis.h:484
struct list * list
Definition: read_list.c:24
#define CSVDIR
Definition: convert.c:31
const char * GPJ_set_csv_loc(const char *name)
Definition: convert.c:978
int G_debug(int level, const char *msg,...)
Print debugging message.
Definition: debug.c:65
void GPJ_free_ellps(struct gpj_ellps *estruct)
Free ellipsoid data structure.
Definition: ellipse.c:309
char * ellps
Definition: gprojects.h:58
int zone
Projection zone (UTM)
Definition: gis.h:424
OGRSpatialReferenceH GPJ_grass_to_osr(const struct Key_Value *proj_info, const struct Key_Value *proj_units)
Converts a GRASS co-ordinate system to an OGRSpatialReferenceH object.
Definition: convert.c:170
OGRSpatialReferenceH GPJ_grass_to_osr2(const struct Key_Value *proj_info, const struct Key_Value *proj_units, const struct Key_Value *proj_epsg)
Converts a GRASS co-ordinate system to an OGRSpatialReferenceH object. EPSG code is preferred if avai...
Definition: convert.c:361
#define PROJECTION_LL
Projection code - Latitude-Longitude.
Definition: gis.h:99
char * longname
Definition: gprojects.h:58
char ** key
Definition: gis.h:483
int proj
Projection code.
Definition: gis.h:422
struct datum_list * read_datum_table(void)
Read the current GRASS datum.table from disk and store in memory.
Definition: proj/datum.c:345
Definition: gis.h:479
char * longname
Definition: gprojects.h:80
double es
Definition: gprojects.h:81
int pj_get_kv(struct pj_info *info, const struct Key_Value *in_proj_keys, const struct Key_Value *in_units_keys)
Create a pj_info struct Co-ordinate System definition from a set of PROJ_INFO / PROJ_UNITS-style key-...
Definition: get_proj.c:61
int GPJ_get_default_datum_params_by_name(const char *name, char **params)
&quot;Last resort&quot; function to retrieve a &quot;default&quot; set of datum parameters for a datum (N...
Definition: proj/datum.c:85
Definition: path.h:16
struct gpj_datum_transform_list * next
Definition: gprojects.h:74
void G_free_tokens(char **tokens)
Free memory allocated to tokens.
Definition: gis/token.c:204
#define _(str)
Definition: glocale.h:13
int nitems
Definition: gis.h:481
char buff[1024]
Definition: raster3d/cats.c:81
void G_set_key_value(const char *key, const char *value, struct Key_Value *kv)
Set value for given key.
Definition: key_value1.c:38
int GPJ_get_ellipsoid_by_name(const char *name, struct gpj_ellps *estruct)
Looks up ellipsoid in ellipsoid table and returns the a, e2 parameters for the ellipsoid.
Definition: ellipse.c:160
const char * name
Definition: named_colr.c:7
int GPJ_osr_to_grass(struct Cell_head *cellhd, struct Key_Value **projinfo, struct Key_Value **projunits, OGRSpatialReferenceH hSRS1, int datumtrans)
Converts an OGRSpatialReferenceH object to a GRASS co-ordinate system.
Definition: convert.c:422
const char * G_gisbase(void)
Get full path name of the top level module directory.
Definition: gisbase.c:41
double rf
Definition: gprojects.h:81
void G_warning(const char *msg,...)
Print a warning message to stderr.
Definition: gis/error.c:204
#define EQUAL
Definition: sqlp.tab.c:159
struct Key_Value * G_create_key_value(void)
Allocate and initialize Key_Value structure.
Definition: key_value1.c:23
void free_ellps_list(struct ellps_list *elist)
Definition: ellipse.c:316