| Element |
Contents |
GRIB API keys |
| 1 |
Data representation type (see WMO
code table 6) |
gridType
|
| 2 |
Number of points along a parallel.
Cannot be used for quasi-regular (reduced) grids. |
Ni
Nx
|
| 3 |
Number of points along a meridian (Nj).
|
Nj
Ny
|
| 4 |
Latitude of the first grid point. |
latitudeOfFirstGridPointInDegrees*1000
|
| 5 |
Longitude of the first grid point. |
longitudeOfFirstGridPointInDegrees*1000
|
| 6 |
Resolution flag:
0 Direction increments not given.
128 Direction increments given.
|
ijDirectionIncrementGiven*128
|
| 7 |
Latitude of the last grid point. |
latitudeOfLastGridPointInDegrees*1000
|
| 8 |
Longitude of the last grid point. |
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 |
0 Regular grid.
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 |
For a quasi-regular (reduced) grid, NN
the number of points along a full parallel (360 degrees) is defined for
each latitude row in the area. The number of parallels is given by Nj
above. |
pl |
