void dsksrf_c ( ConstSpiceChar * dsk,
SpiceCell * srfids )
Find the set of surface ID codes for all surfaces associated with
a given body in a specified DSK file.
Variable I/O Description
-------- --- --------------------------------------------------
dsk I Name of DSK file.
bodyid I Integer body ID code.
srfids I-O Set of ID codes of surfaces in DSK file.
dsk is the name of a DSK file. This file will be
opened for read access by this routine.
bodyid is the integer ID code of a body for which
topographic data are present in the specified DSK
srfids is an initialized CSPICE set data structure.
`srfids' optionally may contain a set of surface ID
codes on input; on output, the ID codes already
present in `srfids' will be combined with surface ID
code set found for the body designated by
`bodyid' in the file DSK.
If `srfids' contains no data on input, its size and
cardinality still must be initialized.
srfids is a CSPICE set data structure that contains
the union of its contents upon input with the set
of ID codes of the surfaces associated with the
body designated by `bodyid', for which segments were
found in the indicated DSK file.
The elements of CSPICE sets are unique; each ID
code in `srfids' appears only once, even if the DSK
file contains multiple segments for that ID code.
See the Examples section below for a complete
example program showing how to retrieve body and
surface ID codes from a DSK file.
1) If the input file has transfer format, the error
SPICE(INVALIDFORMAT) is signaled.
2) If the input file is not a transfer file but has architecture
other than DAS, the error SPICE(BADARCHTYPE) is signaled.
3) If the input file is a binary DAS file of type other than
DSK, the error SPICE(BADFILETYPE) is signaled.
4) If the DSK file cannot be opened or read, the error will
be diagnosed by routines called by this routine.
5) If the size of the output set argument `srfids' is insufficient
to contain the actual number of ID codes of objects covered
by the indicated DSK file, the error will be diagnosed by
routines called by this routine.
See the description of `dsk' above.
This routine provides an API via which applications can determine
the set of surfaces associated with a given body in a specified
DSK file. This routine is normally used together with dskobj_c.
The formatting of the results shown for this example may differ
1) Display the coverage for each object and surface in a specified
DSK file. Find the set of objects in the file. Loop over the
contents of the ID code set: find the surface ID for each item
in the set and display the surface ID.
Example code begins here.
Examine a DSK file and identify the set of
central bodies associated with the segments
in the file. For each body, find the
set of surfaces associated with that body.
#define FILSIZ 256
#define MAXID 10000
SPICEINT_CELL ( bodids, MAXID );
SPICEINT_CELL ( srfids, MAXID );
SpiceChar dsk [ FILSIZ ];
Prompt for the name of a DSK file.
prompt_c ( "Enter name of DSK file > ", FILSIZ, dsk );
dskobj_c ( dsk, &bodids );
for ( i = 0; i < card_c( &bodids ); i++ )
printf ( "\n"
"Body ID: %d\n",
(int)SPICE_CELL_ELEM_I( &bodids, i) );
Get the surface IDs for the Ith body.
dsksrf_c ( dsk, SPICE_CELL_ELEM_I( &bodids, i), &srfids );
for ( j = 0; j < card_c( &srfids ); j++ )
printf ( " Surface ID: %d\n",
(int)SPICE_CELL_ELEM_I( &srfids, j) );
return ( 0 );
When this program was executed on a PC/Linux/gcc/64-bit
platform, using as input the name of a DSK created by a code
example in the header of dskw02_c, the output was:
Enter name of DSK file > ../phobos_3_3_3seg.bds
Body ID: 401
Surface ID: 1
Surface ID: 2
Surface ID: 3
1) If an error occurs while this routine is updating the set
`srfids', the set may be corrupted.
N.J. Bachman (JPL)
-CSPICE Version 1.0.0, 28-JAN-2016 (NJB)
find id codes of surfaces in dsk file