Grid Definition Template 3.40 - Gaussian latitude/longitude



Octet No.	Contents
15	Shape of the earth (see Code Table 3.2)
16	Scale factor or radius of spherical earth
17-20	Scaled value of radius of spherical earth
21	Scaled value of major axis of oblate spheroid earth
22-25	Scaled value of major axis of oblate spheroid earth
26	Scale factor of minor axis of oblate spheroid earth
27-30	Scaled value of minor axis of oblate spheroid earth
31-34	Ni - number of points along a parallel
35-38	Nj - number of points along a meridian
39-42	Basic angle of the initial production domain (see Note 1, below)
43-46	Subdivisions of basic angle used to define extreme longitudes and latitudes, and direction increments (see Note 1, below)
47-50	La1 - latitude of first grid point (see Note 1, below)
51-54	Lo1 - longitude of first grid point (see Note 1, below)
55	Resolution and component flags (see Flag Table 3.3)
56-59	La2 - latitude of last grid point (see Note 1, below)
60-63	Lo2 - longitude of last grid point (see Note 1)
64-67	Di - i direction increment (see Note 1, below)
68-71	N - number of parallels between a a pole and the equator (see Note 2, below)
72	Scanning mode (flags - see Flag Table 3.4)


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, 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.