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#include "hdf.h"
#include "HdfEosDef.h"
/*
* In this example we will retrieve (1) information about the dimensions, (2)
* the dimension mappings (geolocation relations), and (3) the swath fields.
*/
main()
{
intn status, i;
int32 swfid, SWid, ndims, nmaps, rk, nt, dim[8], nflds;
int32 *dims, *off, *inc, *indx, *rank, *ntype;
int32 n, strbufsize, dimsize, offset, incr, *sizes;
char *dimname, *dimmap, *fieldlist, dimlist[80];
/*
* Open the Swath File for read only access
*/
swfid = SWopen("SwathFile_created_with_hadeos_sample_file_writer_of_HDFEOS2_version_219_or_higher_release.hdf", DFACC_READ);
if (swfid == -1)
{
printf("\t\tError: Cannot open file \"SwathFile.hdf\"\n");
return -1;
}
if (swfid != -1)
{
/* Attach the swath */
SWid = SWattach(swfid, "Swath1");
if (SWid == -1)
{
printf("\t\tError: Cannot attach swath \"Swath1\"\n");
return -1;
}
if (SWid != -1)
{
/* Inquire Dimensions */
ndims = SWnentries(SWid, HDFE_NENTDIM, &strbufsize);
if (ndims == -1)
{
printf("\t\tError: Cannot get number of dims for swath \"Swath1\"\n");
return -1;
}
dims = (int32 *) calloc(ndims, 4);
dimname = (char *) calloc(strbufsize + 1, 1);
ndims = SWinqdims(SWid, dimname, dims);
if (ndims == -1)
{
printf("\t\tError: Cannot get dims for swath \"Swath1\"\n");
return -1;
}
printf("Dimension list: %s\n", dimname);
for (i = 0; i < ndims; i++)
printf("dim size: %d\n", dims[i]);
free(dims);
free(dimname);
/* Inquire Dimension Mappings */
nmaps = SWnentries(SWid, HDFE_NENTMAP, &strbufsize);
if (nmaps == -1)
{
printf("\t\tError: Cannot get number of Dimension mappings for \"Swath1\"\n");
return -1;
}
off = (int32 *) calloc(nmaps, 4);
inc = (int32 *) calloc(nmaps, 4);
dimmap = (char *) calloc(strbufsize + 1, 1);
nmaps = SWinqmaps(SWid, dimmap, off, inc);
if (nmaps == -1)
{
printf("\t\tError: Cannot get Dimension mappings for \"Swath1\"\n");
return -1;
}
printf("Dimension map: %s\n", dimmap);
for (i = 0; i < nmaps; i++)
printf("offset increment: %d %d\n",
off[i], inc[i]);
free(off);
free(inc);
free(dimmap);
/* Inquire Indexed Dimension Mappings */
nmaps = SWnentries(SWid, HDFE_NENTIMAP, &strbufsize);
if (nmaps == -1)
{
printf("\t\tError: Cannot get number of Indexed mappings for \"Swath1\"\n");
return -1;
}
sizes = (int32 *) calloc(nmaps, 4);
dimmap = (char *) calloc(strbufsize + 1, 1);
nmaps = SWinqidxmaps(SWid, dimmap, sizes);
if (nmaps == -1)
{
printf("\t\tError: Cannot get Indexed mappings for \"Swath1\"\n");
return -1;
}
printf("Index Dimension map: %s\n", dimmap);
for (i = 0; i < nmaps; i++)
printf("sizes: %d\n", sizes[i]);
free(sizes);
free(dimmap);
/* Inquire Geolocation Fields */
nflds = SWnentries(SWid, HDFE_NENTGFLD, &strbufsize);
if (nflds == -1)
{
printf("\t\tError: Cannot get number of geo fields for swath \"Swath1\"\n");
return -1;
}
rank = (int32 *) calloc(nflds, 4);
ntype = (int32 *) calloc(nflds, 4);
fieldlist = (char *) calloc(strbufsize + 1, 1);
nflds = SWinqgeofields(SWid, fieldlist, rank, ntype);
if (nflds == -1)
{
printf("\t\tError: Cannot get number of geo fields for swath \"Swath1\"\n");
return -1;
}
printf("geo fields: %s\n", fieldlist);
for (i = 0; i < nflds; i++)
printf("rank type: %d %d\n", rank[i], ntype[i]);
free(rank);
free(ntype);
free(fieldlist);
/* Inquire Data Fields */
nflds = SWnentries(SWid, HDFE_NENTDFLD, &strbufsize);
if (nflds == -1)
{
printf("\t\tError: Cannot get number of data fields for swath \"Swath1\"\n");
return -1;
}
rank = (int32 *) calloc(nflds, 4);
ntype = (int32 *) calloc(nflds, 4);
fieldlist = (char *) calloc(strbufsize + 1, 1);
nflds = SWinqdatafields(SWid, fieldlist, rank, ntype);
if (nflds == -1)
{
printf("\t\tError: Cannot get number of data fields for swath \"Swath1\"\n");
return -1;
}
printf("data fields: %s\n", fieldlist);
for (i = 0; i < nflds; i++)
printf("rank type: %d %d\n", rank[i], ntype[i]);
free(rank);
free(ntype);
free(fieldlist);
/* Get info on "GeoTrack" dim */
dimsize = SWdiminfo(SWid, "GeoTrack");
if (dimsize == -1)
{
printf("\t\tError: Cannot get size for dimension \"GeoTrack\"\n");
return -1;
}
printf("Size of GeoTrack: %d\n", dimsize);
/* Get info on "GeoTrack/Res2tr" mapping */
status = SWmapinfo(SWid, "GeoTrack", "Res2tr", &offset, &incr);
if (status == -1)
{
printf("\t\tError: Cannot get map info between \"GeoTrack\" and \"Res2tr\"\n");
return -1;
}
printf("Mapping Offset: %d\n", offset);
printf("Mapping Increment: %d\n", incr);
/* Get info on "IndxTrack/Res2tr" indexed mapping */
dimsize = SWdiminfo(SWid, "IndxTrack");
if (dimsize == -1)
{
printf("\t\tError: Cannot get size for dimension \"IndxTrack\"\n");
return -1;
}
indx = (int32 *) calloc(dimsize, 4);
n = SWidxmapinfo(SWid, "IndxTrack", "Res2tr", indx);
if (n == -1)
{
printf("\t\tError: Cannot get index map info between \"IndxTrack\" and \"Res2tr\"\n");
return -1;
}
for (i = 0; i < n; i++)
printf("Index Mapping Entry %d: %d\n", i+1, indx[i]);
free(indx);
/* Get info on "Longitude" Field */
status = SWfieldinfo(SWid, "Longitude", &rk, dim, &nt, dimlist);
if (status == -1)
{
printf("\t\tError: Cannot get field info for field \"Longitude\"\n");
return -1;
}
printf("Longitude Rank: %d\n", rk);
printf("Longitude NumberType: %d\n", nt);
printf("Longitude Dimension List: %s\n", dimlist);
for (i=0; i<rk; i++)
printf("Dimension %d: %d\n",i+1,dim[i]);
}
}
status = SWdetach(SWid);
if (status == -1)
{
printf("\t\tError: Cannot detach SWid\n");
return -1;
}
status = SWclose(swfid);
if (status == -1)
{
printf("\t\tError: Cannot close hdf file.\n");
return -1;
}
return 0;
}
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