?? gdapi.c
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/*Copyright (C) 1996 Hughes and Applied Research CorporationPermission to use, modify, and distribute this software and its documentation for any purpose without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation.*//*****************************************************************************REVISIONS:Aug 31, 1999 Abe Taaheri Changed memory allocation for utility strings to the size of UTLSTR_MAX_SIZE. Added error check for memory unavailibilty in several functions. Added check for NULL metabuf returned from EHmeta... functions. NULL pointer retruned from EHmeta... functions indicate that memory could not be allocated for metabuf.Jun 27, 2000 Abe Taaheri Added support for EASE grid that uses Behrmann Cylinderical Equal Area (BCEA) projectionOct 23, 2000 Abe Taaheri Updated for ISINUS projection, so that both codes 31 and 99 can be used for this projection.Jan 15, 2003 Abe Taaheri Modified for generalization of EASE Grid. Jun 05, 2003 Bruce Beaumont / Abe Taaheri Fixed SQUARE definition. Added static projection number/name translation Added projection table lookup in GDdefproj. Removed projection table from GDdefproj Added projection table lookup in GDprojinfo Removed projection table from GDprojinfo Added cast for compcode in call to SDsetcompress in GDdeffield to avoid compiler errors Removed declaration for unused variable endptr in GDSDfldsrch Removed initialization code for unused variables in GDSDfldsrch Removed declarations for unused variables BCEA_scale, r0, s0, xMtr0, xMtr1, yMtr0, and yMtr1 in GDll2ij Removed initialization code for unused variables in GDll2ij Added code in GEO projection handling to allow map to span dateline in GDll2ij Changed "for each point" loop in GDll2ij to return -2147483648.0 for xVal and yVal if for_trans returned an error instead of returning an error to the caller (Note: MAXLONG is defined as 2147483647.0 in function cproj.c of GCTP) Added code in GDij2ll to use for_trans to translate the BCEA corner points from packed degrees to meters Removed declarations for unused variables BCEA_scale, r0, s0, xMtr, yMtr, epsilon, beta, qp_cea, kz_cea, eccen, eccen_sq, phi1, sinphi1, cosphi1, lon, lat, xcor, ycor, and nlatlon from GDij2ll Removed initialization code for unused variables in GDij2ll Added declarations for xMtr0, yMtr0, xMtr1, and yMtr1 in GDij2ll Added special-case code for BCEA Changed "for each point" loop in GDij2ll to return PGSd_GCT_IN_ERROR (1.0e51) for longitude and latitude values if inv_trans returned an error instead of return an error to the caller Removed declaration for unused variable ii in GDgetpixvalues Removed declaration for unused variable numTileDims in GDtileinfo Added error message and error return at the end of GDll2mm_cea Added return statement to GDll2mm_cea******************************************************************************/#include "stdio.h"#include "mfhdf.h"#include "hcomp.h"#include <math.h>#include "HdfEosDef.h"extern void for_init(int32, int32, float64 *, int32, char *, char *, int32 *, int32 (*for_trans[])());extern void inv_init(int32, int32, float64 *, int32, char *, char *, int32 *, int32 (*inv_trans[])());#define GDIDOFFSET 4194304#define SQUARE(x) ((x) * (x)) /* x**2 */#define M_PI1 3.14159265358979323846int32 GDXSDcomb[512*5];char GDXSDname[HDFE_NAMBUFSIZE];char GDXSDdims[HDFE_DIMBUFSIZE];#define NGRID 200/* Grid Structure External Arrays */struct gridStructure { int32 active; int32 IDTable; int32 VIDTable[2]; int32 fid; int32 nSDS; int32 *sdsID; int32 compcode; intn compparm[5]; int32 tilecode; int32 tilerank; int32 tiledims[8];};struct gridStructure GDXGrid[NGRID];#define NGRIDREGN 256struct gridRegion{ int32 fid; int32 gridID; int32 xStart; int32 xCount; int32 yStart; int32 yCount; int32 somStart; int32 somCount; float64 upleftpt[2]; float64 lowrightpt[2]; int32 StartVertical[8]; int32 StopVertical[8]; char *DimNamePtr[8];};struct gridRegion *GDXRegion[NGRIDREGN];/* define a macro for the string size of the utility strings and some dimension list strings. The value of 80 in the previous version of this code may not be enough in some cases. The length now is 512 which seems to be more than enough to hold larger strings. */ #define UTLSTR_MAX_SIZE 512/* Static projection table */static struct { int32 projcode; char *projname;} Projections[] = { {GCTP_GEO, "GCTP_GEO"}, {GCTP_UTM, "GCTP_UTM"}, {GCTP_SPCS, "GCTP_SPCS"}, {GCTP_ALBERS, "GCTP_ALBERS"}, {GCTP_LAMCC, "GCTP_LAMCC"}, {GCTP_MERCAT, "GCTP_MERCAT"}, {GCTP_PS, "GCTP_PS"}, {GCTP_POLYC, "GCTP_POLYC"}, {GCTP_EQUIDC, "GCTP_EQUIDC"}, {GCTP_TM, "GCTP_TM"}, {GCTP_STEREO, "GCTP_STEREO"}, {GCTP_LAMAZ, "GCTP_LAMAZ"}, {GCTP_AZMEQD, "GCTP_AZMEQD"}, {GCTP_GNOMON, "GCTP_GNOMON"}, {GCTP_ORTHO, "GCTP_ORTHO"}, {GCTP_GVNSP, "GCTP_GVNSP"}, {GCTP_SNSOID, "GCTP_SNSOID"}, {GCTP_EQRECT, "GCTP_EQRECT"}, {GCTP_MILLER, "GCTP_MILLER"}, {GCTP_VGRINT, "GCTP_VGRINT"}, {GCTP_HOM, "GCTP_HOM"}, {GCTP_ROBIN, "GCTP_ROBIN"}, {GCTP_SOM, "GCTP_SOM"}, {GCTP_ALASKA, "GCTP_ALASKA"}, {GCTP_GOOD, "GCTP_GOOD"}, {GCTP_MOLL, "GCTP_MOLL"}, {GCTP_IMOLL, "GCTP_IMOLL"}, {GCTP_HAMMER, "GCTP_HAMMER"}, {GCTP_WAGIV, "GCTP_WAGIV"}, {GCTP_WAGVII, "GCTP_WAGVII"}, {GCTP_OBLEQA, "GCTP_OBLEQA"}, {GCTP_ISINUS1, "GCTP_ISINUS1"}, {GCTP_CEA, "GCTP_CEA"}, {GCTP_BCEA, "GCTP_BCEA"}, {GCTP_ISINUS, "GCTP_ISINUS"}, {-1, NULL}};/* Grid Function Prototypes (internal routines) */intn GDchkgdid(int32, char *, int32 *, int32 *, int32 *);intn GDfldinfo(int32, char *, int32 *, int32 [], int32 *, char *);intn GDdeffld(int32, char *, char *, int32, int32);intn GDwrmeta(int32, char *, char *, int32);intn GDSDfldsrch(int32, int32, char *, int32 *, int32 *, int32 *, int32 *, int32 [], int32 *);intn GDwrrdfield(int32, char *, char *, int32 [], int32 [], int32 [], VOIDP datbuf);intn GDwrfld(int32, char *, int32 [], int32 [], int32 [], VOIDP);intn GDrdfld(int32, char *, int32 [], int32 [], int32 [], VOIDP);intn GDwrrdattr(int32, char *, int32, int32, char *, VOIDP);intn GDll2ij(int32, int32, float64 [], int32, int32, int32, float64 [], float64 [], int32, float64 [], float64 [], int32 [], int32 [], float64 [], float64 []);intn GDij2ll(int32, int32, float64 [], int32, int32, int32, float64 [], float64 [], int32, int32 [], int32 [], float64 [], float64 [], int32, int32);intn GDreginfo(int32, int32, char *, int32 *, int32 *, int32 [], int32 *, float64 [], float64 []);intn GDgetdefaults(int32, int32, float64 [], int32, float64 [], float64 []);int32 GDdefvrtreg(int32, int32, char *, float64 []);intn GDgetpix(int32, int32, float64 [], float64 [], int32 [], int32 []);int32 GDgetpixval(int32, int32, int32 [], int32 [], char *, VOIDP);intn GDtangentpnts(int32, float64 [], float64 [], float64 [], float64 [], float64 [], int32 *);intn GDwrrdtile(int32, char *, char *, int32 [], VOIDP);intn GDdeftle(int32, int32, int32, int32 []);intn GDtleinfo(int32, char *, int32 *, int32 *, int32 []);intn GDwrtle(int32, char *, int32 [], VOIDP);intn GDrdtle(int32, char *, int32 [], VOIDP);intn GDll2mm_cea(int32 projcode,int32 zonecode, int32 spherecode, float64 projparm[], int32 xdimsize, int32 ydimsize, float64 upleftpt[], float64 lowrightpt[], int32 npnts, float64 lon[],float64 lat[], float64 x[],float64 y[], float64 *scaleX,float64 *scaleY);intn GDmm2ll_cea(int32 projcode,int32 zonecode, int32 spherecode, float64 projparm[], int32 xdimsize, int32 ydimsize, float64 upleftpt[], float64 lowrightpt[], int32 npnts, float64 x[], float64 y[], float64 lon[], float64 lat[]);/*----------------------------------------------------------------------------|| BEGIN_PROLOG || || FUNCTION: GDopen || || DESCRIPTION: Opens or creates HDF file in order to create, read, or write || a grid. || || || Return Value Type Units Description || ============ ====== ========= ===================================== || fid int32 HDF-EOS file ID || || INPUTS: || filename char Filename || access intn HDF access code || || || OUTPUTS: || None || || NOTES: || || || Date Programmer Description || ====== ============ ================================================= || Jun 96 Joel Gales Original Programmer || || END_PROLOG |-----------------------------------------------------------------------------*/int32GDopen(char *filename, intn access){ int32 fid /* HDF-EOS file ID */ ; /* Call EHopen to perform file access */ /* ---------------------------------- */ fid = EHopen(filename, access); return (fid);}/*----------------------------------------------------------------------------|| BEGIN_PROLOG || || FUNCTION: GDcreate || || DESCRIPTION: Creates a grid within the file. || || || Return Value Type Units Description || ============ ====== ========= ===================================== || gridID int32 Grid structure ID || || INPUTS: || fid int32 File ID || gridname char Grid structure name || xdimsize int32 Number of columns in grid || ydimsize int32 Number of rows in grid || upleftpt float64 Location (m/deg) of upper left corner || lowrightpt float64 Location (m/deg) of lower right corner || || || OUTPUTS: || None || || NOTES: || || || Date Programmer Description || ====== ============ ================================================= || Jun 96 Joel Gales Original Programmer || Aug 96 Joel Gales Make metadata ODL compliant || Aug 96 Joel Gales Check grid name for ODL compliance || || END_PROLOG |-----------------------------------------------------------------------------*/int32GDcreate(int32 fid, char *gridname, int32 xdimsize, int32 ydimsize, float64 upleftpt[], float64 lowrightpt[]){ intn i; /* Loop index */ intn ngridopen = 0; /* # of grid structures open */ intn status = 0; /* routine return status variable */ uint8 access; /* Read/Write file access code */ int32 HDFfid; /* HDF file id */?? 快捷鍵說明
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