| Element |
Contents |
GRIB API keys |
| 1 |
Data representation type, = 4 |
gridType
|
| 2 |
Not specified for quasi-regular
(reduced) grids. |
|
| 3 |
Number of points along a meridian (Nj).
|
Nj
Ny
|
| 4 |
Latitude of the first grid point, La1. |
latitudeOfFirstGridPointInDegrees*1000
|
| 5 |
Longitude of the first grid point, Lo1.
|
longitudeOfFirstGridPointInDegrees*1000
|
| 6 |
Resolution flag, = 0 (direction
increments not given) |
ijDirectionIncrementGiven*128
|
| 7 |
Latitude of the last grid point, La2. |
latitudeOfLastGridPointInDegrees*1000
|
| 8 |
Longitude of the last grid point, Lo2. |
longitudeOfLastGridPointInDegrees*1000
|
| 9 |
i direction increment. Cannot be used
for quasi-regular (reduced) grids. |
iDirectionIncrementInDegrees*1000
|
| 10 |
Number of parallels between a pole and
the Equator,ie the gaussian grid number. |
numberOfParallelsBetweenAPoleAndTheEquator
|
| 11 |
Scanning mode flags (see WMO
code table 8) |
iScansNegatively
jScansNegatively
jPointsAreConsecutive
|
| 12 |
Number of vertical coordinate
parameters. |
NV |
| 13 |
Latitude of the southern pole of
rotation. |
latitudeOfSouthernPoleInDegrees*1000
|
| 14 |
Longitude of the southern pole of
rotation. |
longitudeOfSouthernPoleInDegrees*1000
|
| 15 |
Latitude of the pole of stretching. |
latitudeOfPoleOfStretchingInDegrees
*1000 |
| 16 |
Longitude of the pole of stretching. |
longitudeOfPoleOfStretchingInDegrees
*1000 |
| 17 |
1 = quasi-regular (reduced) 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.
0 Resolved u and v components of vector quantities relative to easterly
and northerly directions; or not used.
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. |
|
| 23-nn |
NN, the number of points along a full
parallel (360 degrees) is defined for each latitude row in the
sub-area. The number of parallels is given by Nj above. See the
algorithm below for calculating the actual number of points along each
sub-area latitude row (ECMWF convention). |
pl |
