w3fi71.f File Reference

Make array used by GRIB packer for GDS. More...

Go to the source code of this file.

Functions/Subroutines
subroutine	w3fi71 (igrid, igds, ierr)
	Makes a 18, 37, 55, 64, or 91 word integer array used by w3fi72() GRIB packer to make the grid description section (GDS) - section 2.

Detailed Description

Make array used by GRIB packer for GDS.

Author

Ralph Jones

Date

1992-02-21

Definition in file w3fi71.f.

Function/Subroutine Documentation

w3fi71()

subroutine w3fi71	(	integer	igrid,
		integer, dimension (*)	igds,
			ierr
	)

Makes a 18, 37, 55, 64, or 91 word integer array used by w3fi72() GRIB packer to make the grid description section (GDS) - section 2.

Note

• 1) Office note grid type 26 is 6 in grib, 26 is an international exchange grid.
• 2) Values returned in 18, 37, 55, 64, or 91 word integer array igds vary depending on grid representation type.
• LAT/LON GRID:
  • IGDS( 1) = number of vertical coordinates
  • IGDS( 2) = pv, pl or 255
  • IGDS( 3) = data representation type (code table 6)
  • IGDS( 4) = no. of points along a latitude
  • IGDS( 5) = no. of points along a longitude meridian
  • IGDS( 6) = latitude of origin (south - ive)
  • IGDS( 7) = longitude of origin (west -ive)
  • IGDS( 8) = resolution flag (code table 7)
  • IGDS( 9) = latitude of extreme point (south - ive)
  • IGDS(10) = longitude of extreme point (west - ive)
  • IGDS(11) = latitude increment
  • IGDS(12) = longitude increment
  • IGDS(13) = scanning mode flags (code table 8)
  • IGDS(14) = ... through ...
  • IGDS(18) = ... not used for this grid
  • IGDS(19) - igds(91) for grids 37-44, number of points
  • in each of 73 rows.
• GAUSSIAN GRID:
  • IGDS( 1) = ... through ...
  • IGDS(10) = ... same as lat/lon grid
  • IGDS(11) = number of latitude lines between a pole
  • and the equator
  • IGDS(12) = longitude increment
  • IGDS(13) = scanning mode flags (code table 8)
  • IGDS(14) = ... through ...
  • IGDS(18) = ... not used for this grid
• SPHERICAL HARMONICS:
  • IGDS( 1) = number of vertical coordinates
  • IGDS( 2) = pv, pl or 255
  • IGDS( 3) = data representation type (code table 6)
  • IGDS( 4) = j - pentagonal resolution parameter
  • IGDS( 5) = k - pentagonal resolution parameter
  • IGDS( 6) = m - pentagonal resolution parameter
  • IGDS( 7) = representation type (code table 9)
  • IGDS( 8) = representation mode (code table 10)
  • IGDS( 9) = ... through ...
  • IGDS(18) = ... not used for this grid
• POLAR STEREOGRAPHIC:
  • IGDS( 1) = number of vertical coordinates
  • IGDS( 2) = pv, pl or 255
  • IGDS( 3) = data representation type (code table 6)
  • IGDS( 4) = no. of points along x-axis
  • IGDS( 5) = no. of points along y-axis
  • IGDS( 6) = latitude of origin (south -ive)
  • IGDS( 7) = longitute of origin (west -ive)
  • IGDS( 8) = resolution flag (code table 7)
  • IGDS( 9) = longitude of meridian parallel to y-axis
  • IGDS(10) = x-direction grid length (increment)
  • IGDS(11) = y-direction grid length (increment)
  • IGDS(12) = projection center flag (0=north pole on plane,
  • 1=south pole on plane,
  • IGDS(13) = scanning mode flags (code table 8)
  • IGDS(14) = ... through ...
  • IGDS(18) = .. not used for this grid
• MERCATOR:
  • IGDS( 1) = ... through ...
  • IGDS(12) = ... same as lat/lon grid
  • IGDS(13) = latitude at which projection cylinder
  • intersects earth
  • IGDS(14) = scanning mode flags
  • IGDS(15) = ... through ...
  • IGDS(18) = .. not used for this grid
• LAMBERT CONFORMAL:
  • IGDS( 1) = number of vertical coordinates
  • IGDS( 2) = pv, pl or 255
  • IGDS( 3) = data representation type (code table 6)
  • IGDS( 4) = no. of points along x-axis
  • IGDS( 5) = no. of points along y-axis
  • IGDS( 6) = latitude of origin (south -ive)
  • IGDS( 7) = longitute of origin (west -ive)
  • IGDS( 8) = resolution flag (code table 7)
  • IGDS( 9) = longitude of meridian parallel to y-axis
  • IGDS(10) = x-direction grid length (increment)
  • IGDS(11) = y-direction grid length (increment)
  • IGDS(12) = projection center flag (0=north pole on plane,
  • 1=south pole on plane,
  • IGDS(13) = scanning mode flags (code table 8)
  • IGDS(14) = not used
  • IGDS(15) = first latitude from the pole at which the
  • secant cone cuts the sperical earth
  • IGDS(16) = second latitude ...
  • IGDS(17) = latitude of south pole (millidegrees)
  • IGDS(18) = longitude of south pole (millidegrees)
• ARAKAWA SEMI-STAGGERED E-GRID ON ROTATED LAT/LON GRID
  • IGDS( 1) = number of vertical coordinates
  • IGDS( 2) = pv, pl or 255
  • IGDS( 3) = data representation type (code table 6) [201]
  • IGDS( 4) = ni - total number of actual data points
  • included on grid
  • IGDS( 5) = nj - dummy second dimension; set=1
  • IGDS( 6) = la1 - latitude of first grid point
  • IGDS( 7) = lo1 - longitude of first grid point
  • IGDS( 8) = resolution and component flag (code table 7)
  • IGDS( 9) = la2 - number of mass points along
  • southernmost row of grid
  • IGDS(10) = lo2 - number of rows in each column
  • IGDS(11) = di - longitudinal direction increment
  • IGDS(12) = dj - latitudinal direction increment
  • IGDS(13) = scanning mode flags (code table 8)
  • IGDS(14) = ... through ...
  • IGDS(18) = ... not used for this grid (set to zero)
• ARAKAWA FILLED E-GRID ON ROTATED LAT/LON GRID
  • IGDS( 1) = number of vertical coordinates
  • IGDS( 2) = pv, pl or 255
  • IGDS( 3) = data representation type (code table 6) [202]
  • IGDS( 4) = ni - total number of actual data points
  • included on grid
  • IGDS( 5) = nj - dummy second dimention; set=1
  • IGDS( 6) = la1 - latitude latitude of first grid point
  • IGDS( 7) = lo1 - longitude of first grid point
  • IGDS( 8) = resolution and component flag (code table 7)
  • IGDS( 9) = la2 - number of (zonal) points in each row
  • IGDS(10) = lo2 - number of (meridional) points in each
  • column
  • IGDS(11) = di - longitudinal direction increment
  • IGDS(12) = dj - latitudinal direction increment
  • IGDS(13) = scanning mode flags (code table 8)
  • IGDS(14) = ... through ...
  • IGDS(18) = ... not used for this grid
• ARAKAWA STAGGERED E-GRID ON ROTATED LAT/LON GRID
  • IGDS( 1) = number of vertical coordinates
  • IGDS( 2) = pv, pl or 255
  • IGDS( 3) = data representation type (code table 6) [203]
  • IGDS( 4) = ni - number of data points in each row
  • IGDS( 5) = nj - number of rows
  • IGDS( 6) = la1 - latitude of first grid point
  • IGDS( 7) = lo1 - longitude of first grid point
  • IGDS( 8) = resolution and component flag (code table 7)
  • IGDS( 9) = la2 - central latitude
  • IGDS(10) = lo2 - central longtitude
  • IGDS(11) = di - longitudinal direction increment
  • IGDS(12) = dj - latitudinal direction increment
  • IGDS(13) = scanning mode flags (code table 8)
  • IGDS(14) = ... through ...
  • IGDS(18) = ... not used for this grid
• CURVILINEAR ORTHOGONAL GRID
  • IGDS( 1) = number of vertical coordinates
  • IGDS( 2) = pv, pl or 255
  • IGDS( 3) = data representation type (code table 6) [204]
  • IGDS( 4) = ni - number of data points in each row
  • IGDS( 5) = nj - number of rows
  • IGDS( 6) = reserved (set to 0)
  • IGDS( 7) = reserved (set to 0)
  • IGDS( 8) = resolution and component flag (code table 7)
  • IGDS( 9) = reserved (set to 0)
  • IGDS(10) = reserved (set to 0)
  • IGDS(11) = reserved (set to 0)
  • IGDS(12) = reserved (set to 0)
  • IGDS(13) = scanning mode flags (code table 8)
  • IGDS(14) = ... through ...
  • IGDS(18) = ... not used for this grid

Parameters

[in]	IGRID	GRIB grid number, or office note 84 grid number
[out]	IGDS	18, 37, 55, 64, or 91 word integer array with information to make a grib grid description section.
[out]	IERR	0 Correct exit 1 Grid type in igrid is not in table

Author

Ralph Jones

Date

1992-02-21

Definition at line 186 of file w3fi71.f.