GRIB2 - GRID TEMPLATE 3.43

 Stretched and rotated Gaussian latitude/longitude

Revised 06/18/2008
Red text depicts changes made since07/29/2005
Created 07/29/2005


Octet Contents
15-72 Same as grid definition template 3.40 (see Note 1)
73-76 Latitude of the southern pole of projection
77-80
 Longitude of the southern pole of projection
81-84
 Angle of rotation of projection
85-88
 Latitude of the pole of stretching
89-92
 Longitude of the pole of stretching
93-96
 Stretching factor
97-nn

List of number of points along each meridian or parallel
(These octets are only present for quasi-regular grids as described in note 5)


Notes:

1. Basis angle of the initial production domain and subdivisions of this basic angle are provided to manage cases where the recommended unit of 10-6 degrees is not applicable to describe the extreme longitudes and latitudes, and direction increments. For these last six descriptors, the unit is equal to the ratio of the basic angle and the subdivisions number.  For ordinary cases, zero and missing values should be coded, equivalent to respective values of 1 and 106 (10-6 degrees unit).

2. The number of parallels between a pole and the Equator is used to establish the variable (Gaussian)  spacing of the parallels; this value must always be given.

3.  See Note (2) under grid definition template 3.1 ― rotated latitude/longitude (or equidistant cylindrical, or Plate Carree).
 
4.  See Note (2) under grid definition template 3.2 ― stretched latitude/longitude (or equidistant cylindrical, or Plate Carree).
 
5. A quasi-regular grid is only defined for appropriate grid scanning modes. Either rows or columns, but not both simultaneously, may have variable numbers of points. The first point in each row(column) shall be positioned at the meridian (parallel) indicated by Octets 47-54. The grid points shall be evenly spaced in latitude(longitude).



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