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#include "hdf.h"
/*
* In this example we will (1) open the "SwathFile" HDF file, (2) attach to
* the "Swath1" swath, and (3) write data to the "Longitude", "Latitude",
* and "Spectra" fields.
*/
main()
{
intn i, j, k, status, track, xtrack, start[3], count[3];
int32 swfid, SWid, attr[4]={3, 5, 7, 11};
float32 lng[10] = {0.0, 1.0, 2.0, 3.0, 4.0,
5.0, 6.0, 7.0, 8.0, 9.0}, lat[10];
/* Define longitude values along the cross track */
float64 plane[40*20], tme[20];
/*
* Open the HDF swath file, "SwathFile.hdf".
*/
swfid = SWopen("SwathFile_created_with_hadeos_sample_file_writer_of_HDFEOS2_version_219_or_higher_release.hdf", DFACC_RDWR);
if (swfid == -1)
{
printf("\t\tError: Cannot open file \"SwathFile.hdf\"\n");
return -1;
}
if (swfid != -1)
{
/*
* Attach the "Swath1" swath.
*/
SWid = SWattach(swfid, "Swath1");
if (SWid == -1)
{
printf("\t\tError: Cannot attach swath \"Swath1\"\n");
return -1;
}
if (SWid != -1)
{
/* Write data starting at the beginning of each cross track */
start[1] = 0;
count[0] = 1;
count[1] = 10;
/*
* Loop through all the tracks, incrementing the track starting
* position by one each time.
*/
for (track = 0; track < 20; track++)
{
start[0] = track;
status = SWwritefield(SWid, "Longitude", start, NULL,
count, lng);
if (status == -1)
{
printf("\t\tError: Cannot write field \"Longitude\"\n");
return -1;
}
for (xtrack = 0; xtrack < 10; xtrack++)
lat[xtrack] = track;
status = SWwritefield(SWid, "Latitude", start, NULL,
count, lat);
if (status == -1)
{
printf("\t\tError: Cannot write field \"Latitude\"\n");
return -1;
}
}
/*
* Write Time Field
*/
for (i=0;i<20;i++) tme[i] = 34574087.3 + 84893.2*i;
status = SWwritefield(SWid, "Time", NULL, NULL,
NULL, tme);
if (status == -1)
{
printf("\t\tError: Cannot write field \"Time\"\n");
return -1;
}
/*
* Write Spectra one plane at a time
* Value is 100 * track index + band index
*/
start[1] = 0;
start[2] = 0;
count[0] = 1;
count[1] = 40;
count[2] = 20;
for (i = 0; i < 15; i++)
{
start[0] = i;
for (j=0; j<40; j++)
for (k= 0; k<20; k++)
plane[j*20+k] = j*100 + i;
status = SWwritefield(SWid, "Spectra", start, NULL,
count, plane);
if (status == -1)
{
printf("\t\tError: Cannot write field \"Spectra\"\n");
return -1;
}
}
/* Write User Attribute */
status = SWwriteattr(SWid, "TestAttr", DFNT_INT32, 4, attr);
if (status == -1)
{
printf("\t\tError: Cannot write attribute \"TestAttr\"\n");
return -1;
}
}
}
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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