iplib_4.h File Reference

C interface to gdswzd() and gdswzd_grib1() functions for '4' library build. More...

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Functions
void	gdswzd (int igdtnum, int *igdtmpl, int igdtlen, int iopt, int npts, float fill, float *xpts, float *ypts, float *rlon, float *rlat, int *nret, float *crot, float *srot, float *xlon, float *xlat, float *ylon, float *ylat, float *area)
	gdswzd() interface for C for _4 build of library.
void	gdswzd_grib1 (int *kgds, int iopt, int npts, float fill, float *xpts, float *ypts, float *rlon, float *rlat, int *nret, float *crot, float *srot, float *xlon, float *xlat, float *ylon, float *ylat, float *area)
	gdswzd_grib1() interface for C for the _4 build of the library.

Detailed Description

C interface to gdswzd() and gdswzd_grib1() functions for '4' library build.

Author

Jovic

Date

2016

Definition in file iplib_4.h.

Function Documentation

gdswzd()

void gdswzd	(	int	igdtnum,
		int *	igdtmpl,
		int	igdtlen,
		int	iopt,
		int	npts,
		float	fill,
		float *	xpts,
		float *	ypts,
		float *	rlon,
		float *	rlat,
		int *	nret,
		float *	crot,
		float *	srot,
		float *	xlon,
		float *	xlat,
		float *	ylon,
		float *	ylat,
		float *	area
	)

gdswzd() interface for C for _4 build of library.

Parameters

igdtnum	grid definition template number. Corresponds to the gfldigdtnum component of the ncep g2 library gridmod data structure. 00 equidistant cylindrical 01 rotated equidistant cylindrical. "e" and non-"e" staggered 10 mercator cyclindrical 20 polar stereographic azimuthal 30 lambert conformal conical 40 gaussian equidistant cyclindrical
igdtmpl	(igdtlen) grid definition template array. corresponds to the gfldigdtmpl component of the ncep g2 library gridmod data structure for section three. all projections: 1 shape of earth, octet 15 2 scale factor of spherical earth radius, octet 16 3 scaled value of radius of spherical earth, octets 17-20 4 scale factor of major axis of elliptical earth, octet 21 5 scaled value of major axis of elliptical earth, octets 22-25 6 scale factor of minor axis of elliptical earth, octet 26 7 scaled value of minor axis of elliptical earth, octets 27-30 equidistant cyclindrical: 8 number of points along a parallel, octs 31-34 9 number of points along a meridian, octs 35-38 10 basic angle of initial production domain, octets 39-42. 11 subdivisions of basic angle, octets 43-46 12 latitude of first grid point, octets 47-50 13 longitude of first grid point, octets 51-54 14 resolution and component flags, octet 55 15 latitude of last grid point, octets 56-59 16 longitude of last grid point, octets 60-63 17 i-direction increment, octets 64-67 18 j-direction increment, octets 68-71 19 scanning mode, octet 72 mercator cyclindrical: 8 number of points along a parallel, octs 31-34 9 number of points along a meridian, octs 35-38 10 latitude of first point, octets 39-42 11 longitude of first point, octets 43-46 12 resolution and component flags, octet 47 13 tangent latitude, octets 48-51 14 latitude of last point, octets 52-55 15 longitude of last point, octets 56-59 16 scanning mode flags, octet 60 17 orientation of grid, octets 61-64 18 longitudinal grid length, octets 65-68 19 latitudinal grid length, octets 69-72 Lambert conformal conical: 8 number of points along x-axis, octs 31-34 9 number of points along y-axis, octs 35-38 10 latitude of first point, octets 39-42 11 longitude of first point, octets 43-46 12 resolution of component flag, octet 47 13 latitude where grid lengths specified, octets 48-51 14 longitude of meridian that is parallel to y-axis, octets 52-55 15 x-direction grid length, octets 56-59 16 y-direction grid length, octets 60-63 17 projection center flag, octet 64 18 scanning mode, octet 65 19 first tangent latitude from pole, octets 66-69 20 second tangent latitude from pole, octets 70-73 21 latitude of south pole of projection, octets 74-77 22 longitude of south pole of projection, octets 78-81 gaussian cylindrical: 8 number of points along a parallel, octs 31-34 9 number of points along a meridian, octs 35-38 10 basic angle of initial production domain, octets 39-42 11 subdivisions of basic angle, octets 43-46 12 latitude of first grid point, octets 47-50 13 longitude of first grid point, octets 51-54 14 resolution and component flags, octet 55 15 latitude of last grid point, octets 56-59 16 longitude of last grid point, octets 60-63 17 i-direction increment, octets 64-67 18 number of parallels between pole and equator, octets 68-71 19 scanning mode, octet 72 polar stereographic azimuthal: 8 number of points along x-axis, octets 31-34 9 number of points along y-axis, octets 35-38 10 latitude of first grid point, octets 39-42 11 longitude of first grid point, octets 43-46 12 resolution and component flags, octet 47 13 true latitude, octets 48-51 14 orientation longitude, octets 52-55 15 x-direction grid length, octets 56-59 16 y-direction grid length, octets 60-63 17 projection center flag, octet 64 18 scanning mode flags, octet 65 rotated equidistant cyclindrical: 8 number of points along a parallel, octs 31-34 9 number of points along a meridian, octs 35-38 10 basic angle of initial production domain, octets 39-42 11 subdivisions of basic angle, octets 43-46 12 latitude of first grid point, octets 47-50 13 longitude of first grid point, octets 51-54 14 resolution and component flags, octet 55 15 latitude of last grid point, octets 56-59 16 longitude of last grid point, octets 60-63 17 i-direction increment, octets 64-67 18 j-direction increment, octets 68-71 19 scanning mode, octet 72 20 latitude of southern pole of projection, octets 73-76 21 longitude of southern pole of projection, octets 77-80 22 angle of rotation of projection, octs 81-84
igdtlen	number of elements of the grid definition template array. Corresponds to the gfldigdtlen component of the ncep g2 library gridmod data structure.
iopt	option flag 0 to compute earth coords of all the grid points 1 to compute earth coords of selected grid coords -1 to compute grid coords of selected earth coords
npts	integer maximum number of coordinates
fill	real fill value to set invalid output data (must be impossible value; suggested value: -9999.)
xpts	real (npts) grid x point coordinates if iopt>0
ypts	real (npts) grid y point coordinates if iopt>0
rlon	real (npts) earth longitudes in degrees e if iopt<0 (acceptable range: -360. to 360.)
rlat	real (npts) earth latitudes in degrees n if iopt<0 (acceptable range: -90. to 90.)
nret	number of valid points computed (-1 if projection unrecognized)
crot	(npts) clockwise vector rotation cosines
srot	(npts) clockwise vector rotation sines (ugrid=crot*uearth-srot*vearth, vgrid=srot*uearth+crot*vearth)
xlon	(npts) dx/dlon in 1/degrees
xlat	(npts) dx/dlat in 1/degrees
ylon	(npts) dy/dlon in 1/degrees
ylat	(npts) dy/dlat in 1/degrees
area	(npts) area weights in m**2 (Proportional to the square of the map factor in the case of conformal projections.)

Author

Jovic

Date

2016

gdswzd_grib1()

void gdswzd_grib1	(	int *	kgds,
		int	iopt,
		int	npts,
		float	fill,
		float *	xpts,
		float *	ypts,
		float *	rlon,
		float *	rlat,
		int *	nret,
		float *	crot,
		float *	srot,
		float *	xlon,
		float *	xlat,
		float *	ylon,
		float *	ylat,
		float *	area
	)

gdswzd_grib1() interface for C for the _4 build of the library.

This is a C prototype to call the Fortran module subroutine gdswzd_c_grib1() for the _4 version of the library.

Parameters

kgds	(200) gds parameters as decoded by w3fi63.
iopt	option flag 0 to compute earth coords of all the grid points 1 to compute earth coords of selected grid coords -1 to compute grid coords of selected earth coords
npts	maximum number of coordinates
fill	fill value to set invalid output data (must be impossible value; suggested value: -9999.)
xpts	(npts) grid x point coordinates if iopt>0
ypts	(npts) grid y point coordinates if iopt>0
rlon	(npts) earth longitudes in degrees e if iopt<0 (acceptable range: -360. to 360.)
rlat	(npts) earth latitudes in degrees n if iopt<0 (acceptable range: -90. to 90.)
nret	number of valid points computed (-1 if projection unrecognized)
crot	(npts) clockwise vector rotation cosines
srot	(npts) clockwise vector rotation sines (ugrid=crot*uearth-srot*vearth; vgrid=srot*uearth+crot*vearth)
xlon	(npts) dx/dlon in 1/degrees
xlat	(npts) dx/dlat in 1/degrees
ylon	(npts) dy/dlon in 1/degrees
ylat	(npts) dy/dlat in 1/degrees
area	(npts) area weights in m**2 (proportional to the square of the map factor in the case of conformal projections.)

Author

Jovic

Date

2016