GRIB2 - GRID TEMPLATE 3.2
Stretched Latitude/Longitude (or equidistant cylindrical, or Plate Carree)
Created 06/29/2005

Octet | Contents
--- | ---
15-72 | Same as grid definition Template 3.0 (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

Notes: 1. Basic 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 ration 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 stretching is defined by three parameters: (a) The latitude in degrees (measured in the model coordinate system) of the "pole of stretching"; (b) The longitude in degrees (measured in the model coordinate system) of the "pole of stretching"; and (c) The stretching factor C in units of 10-6 represented as an integer. The stretching is defined by representing data uniformly in a coordinate system with longitude λ and latitude 01, where: 01 = sin-1 [(1- C2) + (1 + C2) sin 0] / [(1 + C2) + (1 - C2) sin 0 ] and λ and 0 are longitude and latitude in a coordinate system in which the "pole of stretching" is the northern pole. C = 1 gives uniform resolution, while C > 1 gives enhanced resolution around the pole of stretching.

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