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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 grid
* fields.
*/
main()
{
intn status, i;
int32 gdfid, GDid1, ndim, nmap, nfld, rk, nt, nflds;
int32 dims[32], rank[32], ntype[32];
int32 n, strbufsize, sizes[16], GDid2;
int32 xdimsize, ydimsize, dimsize, projcode, zonecode;
int32 spherecode;
float64 upleftpt[2], lowrightpt[2], projparm[16];
char dimname[1024], fieldlist[1024];
/*
* Open the Grid File for read only access
*/
gdfid = GDopen("GridFile_created_with_hadeos_sample_file_writer_of_HDFEOS2_version_219_or_higher_release.hdf", DFACC_READ);
if (gdfid != -1)
{
/* Attach the grid */
GDid1 = GDattach(gdfid, "UTMGrid");
if (GDid1 == -1)
{
printf("\t\tError: Cannot attach grid \"UTMGrid\"\n");
return -1;
}
GDid2 = GDattach(gdfid, "PolarGrid");
if (GDid1 == -1)
{
printf("\t\tError: Cannot attach grid \"PolarGrid\"\n");
return -1;
}
ndim = GDinqdims(GDid1, dimname, dims);
if (ndim == -1)
{
printf("\t\tError: Cannot get number of dims for grid \"UTMGrid\"\n");
return -1;
}
printf("Dimension list (UTMGrid): %s\n", dimname);
for (i=0;i<ndim;i++) printf("dim size: %d\n", dims[i]);
ndim = GDinqdims(GDid2, dimname, dims);
if (ndim == -1)
{
printf("\t\tError: Cannot get number of dims for grid \"PolarGrid\"\n");
return -1;
}
printf("Dimension list (PolarGrid): %s\n", dimname);
for (i=0;i<ndim;i++) printf("dim size: %d\n", dims[i]);
dimsize = GDdiminfo(GDid1, "Time");
if (dimsize == -1)
{
printf("\t\tError: Cannot get dim info for \"Time\"\n");
return -1;
}
printf("Size of \"Time\" Array: %d\n", dimsize);
dimsize = GDdiminfo(GDid2, "Bands");
if (dimsize == -1)
{
printf("\t\tError: Cannot get dim info for \"Bands\"\n");
return -1;
}
printf("Size of \"Bands\" Array: %d\n", dimsize);
status = GDgridinfo(GDid1, &xdimsize, &ydimsize,
upleftpt, lowrightpt);
if (status == -1)
{
printf("\t\tError: Cannot get grid info for \"UTMGrid\"\n");
return -1;
}
printf("X dim size, Y dim size (UTMGrid): %d %d\n",
xdimsize, ydimsize);
printf("Up left pt (UTMGrid): %lf %lf\n",
upleftpt[0], upleftpt[1]);
printf("Low right pt (UTMGrid): %lf %lf\n",
lowrightpt[0], lowrightpt[1]);
status = GDgridinfo(GDid2, &xdimsize, &ydimsize,
upleftpt, lowrightpt);
if (status == -1)
{
printf("\t\tError: Cannot get grid info for \"PolarGrid\"\n");
return -1;
}
printf("X dim size, Y dim size (PolarGrid): %d %d\n",
xdimsize, ydimsize);
printf("Up left pt (PolarGrid): %lf %lf\n",
upleftpt[0], upleftpt[1]);
printf("Low right pt (PolarGrid): %lf %lf\n",
lowrightpt[0], lowrightpt[1]);
status = GDprojinfo(GDid1, &projcode, &zonecode,
&spherecode, NULL);
if (status == -1)
{
printf("\t\tError: Cannot get projection info for \"UTMGrid\"\n");
return -1;
}
printf("projcode , zonecode (UTMGrid): %d %d\n", projcode, zonecode);
printf("spherecode (UTMGrid): %d\n", spherecode);
status = GDprojinfo(GDid2, &projcode, NULL,
&spherecode, projparm);
if (status == -1)
{
printf("\t\tError: Cannot get projection info for \"PolarGrid\"\n");
return -1;
}
printf("projcode (PolarGrid): %d\n", projcode);
printf("spherecode (PolarGrid): %d\n", spherecode);
for (i=0; i<13; i++)
printf("Projection Parameter: %d %lf\n",i,projparm[i]);
nflds = GDinqfields(GDid1, fieldlist, rank, ntype);
if (nflds == -1)
{
printf("\t\tError: Cannot inquire field info for \"UTMGrid\"\n");
return -1;
}
if (nflds != 0)
{
printf("Data fields (UTMGrid): %s\n", fieldlist);
for (i=0;i<nflds;i++)
printf("rank type: %d %d\n",rank[i],ntype[i]);
}
nflds = GDinqfields(GDid2, fieldlist, rank, ntype);
if (nflds == -1)
{
printf("\t\tError: Cannot inquire field info for \"PolarGrid\"\n");
return -1;
}
if (nflds != 0)
{
printf("Data fields (PolarGrid): %s\n", fieldlist);
for (i=0;i<nflds;i++)
printf("rank type: %d %d\n",rank[i],ntype[i]);
}
status = GDfieldinfo(GDid2, "Spectra", rank,
dims, ntype, dimname);
if (nflds == -1)
{
printf("\t\tError: Cannot get field info for field \"Spectra\"\n");
return -1;
}
printf("Spectra rank dims: %d\n",rank[0]);
for (i=0; i<rank[0]; i++)
printf("Spectra dims: %d %d\n",i,dims[i]);
printf("Spectra dims: %s\n", dimname);
n = GDnentries(GDid1, HDFE_NENTDIM, &strbufsize);
if (n == -1)
{
printf("\t\tError: Cannot get dim entries info for field \"UTMGrid\"\n");
return -1;
}
printf("Number of dimension entries (UTMGrid): %d\n", n);
printf("Length of Dimension List (UTMGrid): %d\n", strbufsize);
n = GDnentries(GDid1, HDFE_NENTDFLD, &strbufsize);
if (n == -1)
{
printf("\t\tError: Cannot get dim entries info for field \"PolarGrid\"\n");
return -1;
}
printf("Number of data fields (UTMGrid): %d\n", n);
printf("Length of Field List (UTMGrid): %d\n", strbufsize);
}
GDdetach(GDid1);
GDdetach(GDid2);
GDclose(gdfid);
return 0;
}
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