GRIB2 - GRID TEMPLATE 3.10
Mercator
Created 07/20/2005

Octet | Contents
--- | ---
15 | Shape of the Earth (See Table 3.2)
16 | Scale factor of radius of spherical Earth
17-20 | Scale value of radius of spherical Earth
21 | Scale factor 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 | Nj—number of points along a parallel
35-38 | Nj—number of points along a meridian
39-42 | La1 ― latitude of first grid point
43-46 | Lo1 ― longitude of first grid point
47 | Resolution and component flags (see Table 3.3)
48-51 | LaD — latitude(s) at which the Mercator projection intersects the Earth (Latitude(s) where Di and Dj are specified)
52-55 | La2 ― latitude of last grid point
56-59 | Lo2 — longitude of last grid point
60 | Scanning mode (flags ― see Flag table 3.4)
61-64 | Orientation of the grid, angle between i direction on the map and the Equator (see Note1)
65-68 | Dj — longitudinal direction grid length (see Note2)
69-72 | Dj ― latitudinal direction grid length (see Note 2)

Notes: 1. Limited to the range of 0 to 90 degrees; if the angle of orientation of the grid is neither 0 nor 90 degrees, Di and Dj must be equal to each other. 2. Grid lengths are in units of 10-3 m, at the latitude specified by LaD.

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