diff options
Diffstat (limited to 'src/projects.h')
| -rw-r--r-- | src/projects.h | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/src/projects.h b/src/projects.h index ff65e574..f417e4a8 100644 --- a/src/projects.h +++ b/src/projects.h @@ -28,6 +28,9 @@ ****************************************************************************** * * $Log$ + * Revision 1.16 2003/03/15 06:02:02 warmerda + * preliminary NTv2 support, major restructure of datum shifting + * * Revision 1.15 2002/12/14 20:35:15 warmerda * fix C_NAMESPACE warning issue with C_NAMESPACE_VAR for variables * @@ -309,6 +312,7 @@ extern struct PJ_PRIME_MERIDIANS pj_prime_meridians[]; #define MAX_TAB_ID 80 typedef struct { float lam, phi; } FLP; typedef struct { int lam, phi; } ILP; + struct CTABLE { char id[MAX_TAB_ID]; /* ascii info */ LP ll; /* lower left corner coordinates */ @@ -316,7 +320,22 @@ struct CTABLE { ILP lim; /* limits of conversion matrix */ FLP *cvs; /* conversion matrix */ }; - /* procedure prototypes */ + +typedef struct _pj_gi { + char *gridname; /* identifying name of grid, eg "conus" or ntv2_0.gsb */ + char *filename; /* full path to filename */ + + const char *format; /* format of this grid, ie "ctable", "ntv1", + "ntv2" or "missing". */ + + int grid_offset; /* offset in file, for delayed loading */ + + struct CTABLE *ct; + + struct _pj_gi *next; +} PJ_GRIDINFO; + +/* procedure prototypes */ double dmstor(const char *, char **); void set_rtodms(int, int); char *rtodms(char *, double, int, int); @@ -371,7 +390,18 @@ int bch2bps(projUV, projUV, projUV **, int, int); LP nad_intr(LP, struct CTABLE *); LP nad_cvt(LP, int, struct CTABLE *); struct CTABLE *nad_init(char *); +struct CTABLE *nad_load_ctable( FILE * fid ); void nad_free(struct CTABLE *); + +/* higher level handling of datum grid shift files */ + +PJ_GRIDINFO **pj_gridlist_from_nadgrids( const char *, int * ); +void pj_deallocate_grids(); + +PJ_GRIDINFO *pj_gridinfo_init( const char * ); +int pj_gridinfo_load( PJ_GRIDINFO * ); +void pj_gridinfo_free( PJ_GRIDINFO * ); + extern char const pj_release[]; #ifndef DISABLE_CVSID |