GRIB API Manual
Author: $Author: Enrico Fucile $
Keywords: webgroup documents

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Polar stereographic
Element | Contents | GRIB API keys
--- | --- | ---
1 | Data representation type (see WMO code table 6). 5 for polar stereographic | gridType
2 | Number of points along X-axis. | Nx Ni
3 | Number of points along Y-axis. | Ny Nj
4 | Latitude of the first grid point. | latitudeOfFirstGridPointInDegrees*1000
5 | Longitude of the first grid point. | longitudeOfFirstGridPointInDegrees*1000
6 | Reserved. Set to 0. (Resolution flag is not applicable to polar stereographic.) |
7 | Orientation of the grid, ie the longitude of the meridian which is parallel to the Y-axis along which latitude increases as the Y-coordinate increases. | orientationOfTheGrid
8 | Reserved. Set to 0. |
9 | X-direction grid length. | xDirectionGridLengthInMetres
10 | Y-direction grid length. | yDirectionGridLengthInMetres
11 | Scanning mode flag (see WMO code table 8) |
12 | Zero |
13 |
    Projection centre flag:
     0      North pole is on projection plane.
     128    South pole is on projection plane.
| projectionCenterFlag
14-16 | Reserved. Set to 0. |
17 | 0 Regular grid. | gridType
18 |
    Earth flag:
     0      Earth assumed spherical with radius 6367.47 km.
     64     Earth assumed oblate spheroidal with size as determined by IAU in 1965:
              6378.160km,   6356.775km,   f=1/297.0
| earthIsOblate
19 |
    Components flag. Valid values are:
     0      Resolved u and v components of vector quantities relative to easterly
            and northerly directions.
     8      Resolved u and v components of vector quantities relative to the
            defined grid in the direction of increasing x and y (or i and j)
            coordinates respectively.
| uvRelativeToGrid
20-22 | Reserved. Set to 0. |

Grid lengths are in metres, at the 60-degree parallel nearest to the pole on the projection plane.

| 22.10.2010-->-->

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