This file is indexed.

/usr/include/ossim/base/datum.h is in libossim-dev 1.7.21-4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
#ifndef DATUM_H
#define DATUM_H

/***************************************************************************/
/* RSC IDENTIFIER: Datum
 *
 * ABSTRACT
 *
 *    This component provides datum shifts for a large collection of local
 *    datums, WGS72, and WGS84.  A particular datum can be accessed by using its 
 *    standard 5-letter code to find its index in the datum table.  The index 
 *    can then be used to retrieve the name, type, ellipsoid code, and datum 
 *    shift parameters, and to perform shifts to or from that datum.
 *    
 *    By sequentially retrieving all of the datum codes and/or names, a menu
 *    of the available datums can be constructed.  The index values resulting
 *    from selections from this menu can then be used to access the parameters
 *    of the selected datum, or to perform datum shifts involving that datum.
 *
 *    This component supports both 3-parameter local datums, for which only X,
 *    Y, and Z translations relative to WGS 84 have been defined, and 
 *    7-parameter local datums, for which X, Y, and Z rotations, and a scale 
 *    factor, are also defined.  It also includes entries for WGS 84 (with an
 *    index of 0), and WGS 72 (with an index of 1), but no shift parameter 
 *    values are defined for these.
 *
 *    This component provides datum shift functions for both geocentric and
 *    geodetic coordinates.  WGS84 is used as an intermediate state when
 *    shifting from one local datum to another.  When geodetic coordinates are
 *    given Molodensky's method is used, except near the poles where the 3-step
 *    step method is used instead.  Specific algorithms are used for shifting 
 *    between WGS72 and WGS84.
 *
 *    This component depends on two data files, named 3_param.dat and 
 *    7_param.dat, which contain the datum parameter values.  Copies of these
 *    files must be located in the directory specified by the value of the 
 *    environment variable "DATUM_DATA", if defined, or else in the current 
 *    directory whenever a program containing this component is executed. 
 *
 *    Additional datums can be added to these files, either manually or using 
 *    the Create_Datum function.  However, if a large number of datums are 
 *    added, the datum table array sizes in this component will have to be 
 *    increased.
 *
 *    This component depends on two other components: the Ellipsoid component
 *    for access to ellipsoid parameters; and the Geocentric component for 
 *    conversions between geodetic and geocentric coordinates.
 *
 * ERROR HANDLING
 *
 *    This component checks for input file errors and input parameter errors.
 *    If an invalid value is found, the error code is combined with the current
 *    error code using the bitwise or.  This combining allows multiple error
 *    codes to be returned. The possible error codes are:
 *
 *  DATUM_NO_ERROR                  : No errors occurred in function
 *  DATUM_NOT_INITIALIZED_ERROR     : Datum module has not been initialized
 *  DATUM_7PARAM_FILE_OPEN_ERROR    : 7 parameter file opening error
 *  DATUM_7PARAM_FILE_PARSING_ERROR : 7 parameter file structure error
 *  DATUM_7PARAM_OVERFLOW_ERROR     : 7 parameter table overflow
 *  DATUM_3PARAM_FILE_OPEN_ERROR    : 3 parameter file opening error
 *  DATUM_3PARAM_FILE_PARSING_ERROR : 3 parameter file structure error
 *  DATUM_3PARAM_OVERFLOW_ERROR     : 3 parameter table overflow
 *  DATUM_INVALID_INDEX_ERROR       : Index out of valid range (less than one
 *                                      or more than Datum_Count)
 *  DATUM_INVALID_SRC_INDEX_ERROR   : Source datum index invalid
 *  DATUM_INVALID_DEST_INDEX_ERROR  : Destination datum index invalid
 *  DATUM_INVALID_CODE_ERROR        : Datum code not found in table
 *  DATUM_LAT_ERROR                 : Latitude out of valid range (-90 to 90)
 *  DATUM_LON_ERROR                 : Longitude out of valid range (-180 to
 *                                    360)
 *  DATUM_SIGMA_ERROR               : Standard error values must be positive
 *                                    (or -1 if unknown)
 *  DATUM_DOMAIN_ERROR              : Domain of validity not well defined
 *  DATUM_ELLIPSE_ERROR             : Error in ellipsoid module
 *
 *
 * REUSE NOTES
 *
 *    Datum is intended for reuse by any application that needs access to 
 *    datum shift parameters relative to WGS 84.
 *
 *    
 * REFERENCES
 *
 *    Further information on Datum can be found in the Reuse Manual.
 *
 *    Datum originated from :  U.S. Army Topographic Engineering Center (USATEC)
 *                             Geospatial Information Division (GID)
 *                             7701 Telegraph Road
 *                             Alexandria, VA  22310-3864
 *
 * LICENSES
 *
 *    None apply to this component.
 *
 * RESTRICTIONS
 *
 *    Datum has no restrictions.
 *
 * ENVIRONMENT
 *
 *    Datum was tested and certified in the following environments:
 *
 *    1. Solaris 2.5 with GCC 2.8.1
 *    2. MS Windows 95 with MS Visual C++ 6
 *
 * MODIFICATIONS
 *
 *    Date              Description
 *    ----              -----------
 *    03/30/97          Original Code
 *    05/28/99          Added user-definable datums (for JMTK)
 *                      Added datum domain of validity checking (for JMTK)
 *                      Added datum shift accuracy calculation (for JMTK) 
 */


/***************************************************************************/
/*
 *                              DEFINES
 */

#define DATUM_NO_ERROR                          0x0000
#define DATUM_NOT_INITIALIZED_ERROR             0x0001
#define DATUM_7PARAM_FILE_OPEN_ERROR            0x0002
#define DATUM_7PARAM_FILE_PARSING_ERROR         0x0004
#define DATUM_7PARAM_OVERFLOW_ERROR             0x0008
#define DATUM_3PARAM_FILE_OPEN_ERROR            0x0010
#define DATUM_3PARAM_FILE_PARSING_ERROR         0x0020
#define DATUM_3PARAM_OVERFLOW_ERROR             0x0040
#define DATUM_INVALID_INDEX_ERROR               0x0080
#define DATUM_INVALID_SRC_INDEX_ERROR           0x0100
#define DATUM_INVALID_DEST_INDEX_ERROR          0x0200
#define DATUM_INVALID_CODE_ERROR                0x0400
#define DATUM_LAT_ERROR                         0x0800
#define DATUM_LON_ERROR                         0x1000
#define DATUM_SIGMA_ERROR                       0x2000
#define DATUM_DOMAIN_ERROR                      0x4000
#define DATUM_ELLIPSE_ERROR                     0x8000


/***************************************************************************/
/*
 *                          GLOBAL DECLARATIONS
 */
typedef enum Datum_Types
{
  Three_Param_Datum,
  Seven_Param_Datum,
  WGS84_Datum,
  WGS72_Datum
} Datum_Type; /* different types of datums */


/***************************************************************************/
/*
 *                            FUNCTION PROTOTYPES
 */

/* ensure proper linkage to c++ programs */
#ifdef __cplusplus 
extern "C" {
#endif

  long Initialize_Datums(void);
/*
 * The function Initialize_Datums creates the datum table from two external
 * files.  If an error occurs, the initialization stops and an error code is
 * returned.  This function must be called before any of the other functions
 * in this component.
 */


  long Create_Datum ( const char *Code,
                      const char *Name,
                      const char *Ellipsoid_Code,
                      double Delta_X,
                      double Delta_Y,
                      double Delta_Z,
                      double Sigma_X,
                      double Sigma_Y,
                      double Sigma_Z,
                      double South_latitude,
                      double North_latitude,
                      double West_longitude,
                      double East_longitude);
/*
 *   Code           : 5-letter new datum code.                      (input)
 *   Name           : Name of the new datum                         (input)
 *   Ellipsoid_Code : 2-letter code for the associated ellipsoid    (input)
 *   Delta_X        : X translation to WGS84 in meters              (input)
 *   Delta_Y        : Y translation to WGS84 in meters              (input)
 *   Delta_Z        : Z translation to WGS84 in meters              (input)
 *   Sigma_X        : Standard error in X in meters                 (input)
 *   Sigma_Y        : Standard error in Y in meters                 (input)
 *   Sigma_Z        : Standard error in Z in meters                 (input)
 *   South_latitude : Southern edge of validity rectangle in radians(input)
 *   North_latitude : Northern edge of validity rectangle in radians(input)
 *   West_longitude : Western edge of validity rectangle in radians (input)
 *   East_longitude : Eastern edge of validity rectangle in radians (input)
 *
 * The function Create_Datum creates a new local (3-parameter) datum with the 
 * specified code, name, shift values, and standard error values.  If the 
 * datum table has not been initialized, the specified code is already in use, 
 * or a new version of the 3-param.dat file cannot be created, an error code 
 * is returned, otherwise DATUM_NO_ERROR is returned.  Note that the indexes 
 * of all datums in the datum table may be changed by this function.
 */


  long Datum_Count ( long *Count );
/*
 *  The function Datum_Count returns the number of Datums in the table
 *  if the table was initialized without error.
 *
 *  Count   : number of datums in the datum table                   (output)
 */


  long Datum_Index ( const char *Code, 
                     long *Index );
/*
 *  The function Datum_Index returns the index of the datum with the 
 *  specified code.
 *
 *  Code    : The datum code being searched for                     (input)
 *  Index   : The index of the datum in the table with the          (output)
 *              specified code
 */


  long Datum_Code ( const long Index,
                    char *Code );
/*
 *  The function Datum_Code returns the 5-letter code of the datum
 *  referenced by index.
 *
 *  Index   : The index of a given datum in the datum table         (input)
 *  Code    : The datum code of the datum referenced by index       (output)
 */


  long Datum_Name ( const long Index,
                    char *Name );
/*
 *  The function Datum_Name returns the name of the datum referenced by
 *  index.
 *
 *  Index   : The index of a given datum in the datum table         (input)
 *  Name    : The datum name of the datum referenced by index       (output)
 */


  long Datum_Ellipsoid_Code ( const long Index,
                              char *Code );
/*
 *  The function Datum_Ellipsoid_Code returns the 2-letter ellipsoid code 
 *  for the ellipsoid associated with the datum referenced by index.
 *
 *  Index   : The index of a given datum in the datum table           (input)
 *  Code    : The ellisoid code for the ellipsoid associated with the (output)
 *               datum referenced by index 
 */


  long Get_Datum_Type ( const long Index,
                        Datum_Type *Type );
/*
 *  The function Get_Datum_Type returns the type of the datum referenced by
 *  index.
 *
 *  Index   : The index of a given datum in the datum table         (input)
 *  Type    : The type of the datum referenced by index             (output)
 */


  long Datum_Seven_Parameters ( const long Index, 
                                double *Delta_X,
                                double *Delta_Y,
                                double *Delta_Z,
                                double *Rx,
                                double *Ry,
                                double *Rz,
                                double *Scale_Factor );
/*
 *   The function Datum_Seven_Parameters returns the seven parameters
 *   for the datum referenced by index.
 *
 *    Index      : The index of a given datum in the datum table   (input)
 *    Delta_X    : X translation in meters                         (output)
 *    Delta_Y    : Y translation in meters                         (output)
 *    Delta_Z    : Z translation in meters                         (output)
 *    Rx         : X rotation in radians                           (output)
 *    Rx         : Y rotation in radians                           (output)
 *    Ry         : Z rotation in radians                           (output)
 *    Scale_Factor : Scale factor                                  (output)
 */


  long Datum_Three_Parameters ( const long Index, 
                                double *Delta_X,
                                double *Delta_Y,
                                double *Delta_Z);
/*
 *   The function Datum_Three_Parameters returns the three parameters 
 *   for the datum referenced by index.
 *
 *    Index      : The index of a given datum in the datum table   (input)
 *    Delta_X    : X translation in meters                         (output)
 *    Delta_Y    : Y translation in meters                         (output)
 *    Delta_Z    : Z translation in meters                         (output)
 */


  long Datum_Errors ( const long Index,
                      double *Sigma_X,
                      double *Sigma_Y,
                      double *Sigma_Z);
/*
 *   The function Datum_Errors returns the standard errors in X,Y, & Z 
 *   for the datum referenced by index.
 *
 *    Index      : The index of a given datum in the datum table   (input)
 *    Sigma_X    : Standard error in X in meters                   (output)
 *    Sigma_Y    : Standard error in Y in meters                   (output)
 *    Sigma_Z    : Standard error in Z in meters                   (output)
 */


  long Datum_Valid_Rectangle ( const long Index,
                               double *South_latitude,
                               double *North_latitude,
                               double *West_longitude,
                               double *East_longitude);
/*
 *   The function Datum_Valid_Rectangle returns the edges of the validity 
 *   rectangle for the datum referenced by index.
 *
 *   Index          : The index of a given datum in the datum table   (input)
 *   South_latitude : Southern edge of validity rectangle in radians  (input)
 *   North_latitude : Northern edge of validity rectangle in radians  (input)
 *   West_longitude : Western edge of validity rectangle in radians   (input)
 *   East_longitude : Eastern edge of validity rectangle in radians   (input)
 */


  long Valid_Datum ( const long Index,
                     double latitude,
                     double longitude,
                     long *result);
/*
 *  This function checks whether or not the specified location is within the 
 *  validity rectangle for the specified datum.  It returns zero if the specified
 *  location is NOT within the validity rectangle, and returns 1 otherwise.
 *
 *   Index     : The index of a given datum in the datum table      (input)
 *   latitude  : Latitude of the location to be checked in radians  (input)
 *   longitude : Longitude of the location to be checked in radians (input)
 *   result    : Indicates whether location is inside (1) or outside (0)
 *               of the validity rectangle of the specified datum   (output)
 */


  long Geocentric_Shift_To_WGS84 (const long Index,
                                  const double X,
                                  const double Y,
                                  const double Z,
                                  double *X_WGS84,
                                  double *Y_WGS84,
                                  double *Z_WGS84);
/*
 *  This function shifts a geocentric coordinate (X, Y, Z in meters) relative
 *  to the datum referenced by index to a geocentric coordinate (X, Y, Z in
 *  meters) relative to WGS84.
 *
 *  Index   : Index of local datum                       (input)
 *  X       : X coordinate relative to the source datum  (input)
 *  Y       : Y coordinate relative to the source datum  (input)
 *  Z       : Z coordinate relative to the source datum  (input)
 *  X_WGS84 : X coordinate relative to WGS84             (output)
 *  Y_WGS84 : Y coordinate relative to WGS84             (output)
 *  Z_WGS84 : Z coordinate relative to WGS84             (output)
 */


  long Geocentric_Shift_From_WGS84 (const double X_WGS84,
                                    const double Y_WGS84,
                                    const double Z_WGS84,
                                    const long Index,
                                    double *X,
                                    double *Y,
                                    double *Z);
/*
 *  This function shifts a geocentric coordinate (X, Y, Z in meters) relative
 *  to WGS84 to a geocentric coordinate (X, Y, Z in meters) relative to the
 *  local datum referenced by index.
 *
 *  X_WGS84 : X coordinate relative to WGS84                 (input)
 *  Y_WGS84 : Y coordinate relative to WGS84                 (input)
 *  Z_WGS84 : Z coordinate relative to WGS84                 (input)
 *  Index   : Index of destination datum                     (input)
 *  X       : X coordinate relative to the destination datum (output)
 *  Y       : Y coordinate relative to the destination datum (output)
 *  Z       : Z coordinate relative to the destination datum (output)
 */


  long Geocentric_Datum_Shift ( const long Index_in,
                                const double X_in,
                                const double Y_in,
                                const double Z_in,
                                const long Index_out,
                                double *X_out,
                                double *Y_out,
                                double *Z_out);
/*
 *  This function shifts a geocentric coordinate (X, Y, Z in meters) relative
 *  to the source datum to geocentric coordinate (X, Y, Z in meters) relative
 *  to the destination datum.
 *
 *  Index_in  : Index of source datum                      (input)
 *  X_in      : X coordinate relative to source datum      (input)
 *  Y_in      : Y coordinate relative to source datum      (input)
 *  Z_in      : Z coordinate relative to source datum      (input)
 *  Index_out : Index of destination datum                 (input)
 *  X_out     : X coordinate relative to destination datum (output)
 *  Y_out     : Y coordinate relative to destination datum (output)
 *  Z_out     : Z coordinate relative to destination datum (output)
 */


  long Geodetic_Shift_To_WGS84 (const long Index,
                                const double Lat_in,
                                const double Lon_in,
                                const double Hgt_in,
                                double *WGS84_Lat,
                                double *WGS84_Lon,
                                double *WGS84_Hgt);
/*
 *  This function shifts geodetic coordinates relative to a given source datum
 *  to geodetic coordinates relative to WGS84.
 *
 *  Index     : Index of source datum                                 (input)
 *  Lat_in    : Latitude in radians relative to source datum          (input)
 *  Lon_in    : Longitude in radians relative to source datum         (input)
 *  Hgt_in    : Height in meters relative to source datum's ellipsoid (input)
 *  WGS84_Lat : Latitude in radians relative to WGS84                 (output)
 *  WGS84_Lon : Longitude in radians relative to WGS84                (output)
 *  WGS84_Hgt : Height in meters relative to WGS84 ellipsoid          (output)
 */


  long Geodetic_Shift_From_WGS84( const double WGS84_Lat,
                                  const double WGS84_Lon,
                                  const double WGS84_Hgt,
                                  const long Index,
                                  double *Lat_out,
                                  double *Lon_out,
                                  double *Hgt_out);
/*
 *  This function shifts geodetic coordinates relative to a WGS84 
 *  to geodetic coordinates relative to a given local datum.
 *                                                                   
 *  WGS84_Lat : Latitude in radians relative to WGS84                      (input)
 *  WGS84_Lon : Longitude in radians relative to WGS84                     (input)
 *  WGS84_Hgt : Height in meters relative to WGS84 ellipsoid               (input)
 *  Index     : Index of destination datum                                 (input)
 *  Lat_in    : Latitude in radians relative to destination datum          (output)
 *  Lon_in    : Longitude in radians relative to destination datum         (output)
 *  Hgt_in    : Height in meters relative to destination datum's ellipsoid (output)
 */


  long Geodetic_Datum_Shift ( const long Index_in,
                              const double Lat_in,
                              const double Lon_in,
                              const double Hgt_in,
                              const long Index_out,
                              double *Lat_out,
                              double *Lon_out,
                              double *Hgt_out);
/*
 *  This function shifts geodetic coordinates (latitude, longitude in radians
 *  and height in meters) relative to the source datum to geodetic coordinates
 *  (latitude, longitude in radians and height in meters) relative to the
 *  destination datum.
 *
 *  Index_in  : Index of source datum                                      (input)
 *  Lat_in    : Latitude in radians relative to source datum               (input)
 *  Lon_in    : Longitude in radians relative to source datum              (input)
 *  Hgt_in    : Height in meters relative to source datum's ellipsoid      (input)
 *  Index_out : Index of destination datum                                 (input)
 *  Lat_out   : Latitude in radians relative to destination datum          (output)
 *  Lon_out   : Longitude in radians relative to destination datum         (output)
 *  Hgt_out   : Height in meters relative to destination datum's ellipsoid (output)
 */


  long Datum_Shift_Error (const long Index_in,
                          const long Index_out,
                          double latitude,
                          double longitude,
                          double *ce90,
                          double *le90,
                          double *se90);
/*
 *  This function returns the 90% horizontal (circular), vertical (linear), and 
 *  spherical errors for a shift from the specified source datum to the 
 *  specified destination datum at the specified location.
 *
 *  Index_in  : Index of source datum                                      (input)
 *  Index_out : Index of destination datum                                 (input)
 *  latitude  : Latitude of point being converted in radians               (input)
 *  longitude : Longitude of point being converted in radians              (input)
 *  ce90      : Combined 90% circular horizontal error in meters           (output)
 *  le90      : Combined 90% linear vertical error in meters               (output)
 *  se90      : Combined 90% spherical error in meters                     (output)
 */


#ifdef __cplusplus 
}
#endif

#endif /* DATUM_H */