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/*
----------------------------------------------------------------------------
| Copyright (C) 1999 Emergent IT Inc. and Raytheon Systems Company |
----------------------------------------------------------------------------
*/
#include <HE5_HdfEosDef.h>
/*
* In this example we will open an HDF-EOS file and create UTM and Polar
* Stereographic grid structures within the file.
*/
int main()
{
herr_t status = FAIL;
hid_t gdfid = FAIL;
hid_t GDid = FAIL;
hid_t GDid2 = FAIL;
hid_t GDid3 = FAIL;
int i, j;
int zonecode, projcode, spherecode, dummy = 0;
long xdim, ydim;
double projparm[16], uplft[2], lowrgt[2];
/*
* We first open the HDF grid file, "Grid.h5". Because this file
* does not already exist, we use the H5F_ACC_TRUNC access code in the
* open statement. The GDopen routine returns the grid file id, gdfid,
* which is used to identify the file in subsequent routines in the
* library.
*/
gdfid = HE5_GDopen("Grid.h5", H5F_ACC_TRUNC);
/*
* Create UTM Grid
*
* Region is bounded by 54 E and 60 E longitude and 20 N and 30 N latitude.
* UTM Zone 40
*
* Use default spheriod (Clarke 1866 - spherecode = 0)
*
* Grid into 120 bins along x-axis and 200 bins along y-axis
* (approx 3' by 3' bins)
*/
zonecode = 40;
spherecode = 0;
/* Upper Left and Lower Right points in meters */
/* ------------------------------------------- */
uplft[0] = 210584.50041;
uplft[1] = 3322395.95445;
lowrgt[0] = 813931.10959;
lowrgt[1] = 2214162.53278;
xdim = 120;
ydim = 200;
GDid = HE5_GDcreate(gdfid, "UTMGrid", xdim, ydim, uplft, lowrgt);
printf("Grid ID returned by HE5_GDcreate : %ld \n", (long) GDid);
status = HE5_GDdefproj(GDid, HE5_GCTP_UTM, zonecode, spherecode, projparm);
printf("status returned by HE5_GDdefproj(...\"HE5_GCTP_UTM\"...) : %d \n", status);
/* Define "Time" Dimension */
status = HE5_GDdefdim(GDid, "Time", 10);
printf("status returned by HE5_GDdefdim(...\"Time\"...) : %d \n", status);
/* Define "External" Dimension */
/* --------------------------- */
status = HE5_GDdefdim(GDid, "ExtDim", 60);
printf("status returned by HE5_GDdefdim(...\"ExtDim\"...): %d \n", status);
/* Define "Unlim" Dimension */
status = HE5_GDdefdim(GDid, "Unlim", H5S_UNLIMITED);
printf("status returned by HE5_GDdefdim(...\"Unlim\"...) : %d \n", status);
/*
* Create polar stereographic grid
*
* Northern Hemisphere (True Scale at 90 N, 0 Longitude below pole)
*
* Use International 1967 spheriod (spherecode = 3)
*
* Grid into 100 bins along x-axis and y-axis
*/
spherecode = 3;
/* Define GCTP Projection Parameters */
/* --------------------------------- */
for (i = 0; i < 16; i++)
projparm[i] = 0;
/* Set Longitude below pole & true scale in DDDMMMSSS.SSS format) */
projparm[4] = 0.0;
projparm[5] = 90000000.00;
xdim = 100;
ydim = 100;
GDid2 = HE5_GDcreate(gdfid, "PolarGrid", xdim, ydim, NULL, NULL);
printf("Grid ID returned by HE5_GDcreate() : %ld \n", (long) GDid2);
status = HE5_GDdefproj(GDid2, HE5_GCTP_PS, dummy, spherecode, projparm);
printf("status returned by HE5_GDdefproj(...\"HE5_GCTP_PS\"...) : %d \n", status);
status = HE5_GDdeforigin(GDid2, HE5_HDFE_GD_LR);
printf("status returned by HE5_GDdeforigin() : %d \n", status);
/* Define "Bands" Dimension */
status = HE5_GDdefdim(GDid2, "Bands", 3);
printf("status returned by HE5_GDdefdim(...\"Bands\"...) : %d \n", status);
/*
* Create geographic (linear scale) grid
*
* 0 - 15 degrees longitude, 20 - 30 degrees latitude
*
*/
xdim = 60;
ydim = 40;
uplft[0] = HE5_EHconvAng(0., HE5_HDFE_DEG_DMS);
uplft[1] = HE5_EHconvAng(30., HE5_HDFE_DEG_DMS);
lowrgt[0] = HE5_EHconvAng(15., HE5_HDFE_DEG_DMS);
lowrgt[1] = HE5_EHconvAng(20., HE5_HDFE_DEG_DMS);
GDid3 = HE5_GDcreate(gdfid, "GEOGrid", xdim, ydim, uplft, lowrgt);
printf("Grid ID returned by HE5_GDcreate() : %ld \n", (long) GDid3);
status = HE5_GDdefproj(GDid3, HE5_GCTP_GEO, dummy, dummy, NULL);
printf("status returned by HE5_GDdefproj(...\"HE5_GCTP_GEO\"...) : %d \n", status);
/*
* We now close the grid interface with the GDdetach routine. This step
* is necessary to properly store the grid information within the file
* AND SHOULD BE DONE BEFORE WRITING OR READING DATA TO OR FROM THE FIELD.
*/
status = HE5_GDdetach(GDid);
status = HE5_GDdetach(GDid2);
status = HE5_GDdetach(GDid3);
/*
* Finally, we close the grid file using the HE5_GDclose routine. This will
* release the grid file handles established by HE5_GDopen.
*/
status = HE5_GDclose(gdfid);
return 0;
}
|
