| 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. |
|
