| Element |
Contents |
GRIB API keys |
| 1 |
Data representation type (see WMO code table 6); eg
3 Lambert conformal
8 Albers equal area
13 Oblique Lambert conformal
|
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 |
Resolution flag:
0 Direction increments not given.
128 Direction increments given.
|
ijDirectionIncrementGiven*128
|
| 7 |
Orientation of the grid. The East longitude of the
meridian which is parallel to the Y-axis along which latitude increases
as the Y-coordinate increases. |
orientationOfTheGridInDegrees*1000
|
| 8 |
Reserved. Set to 0. |
|
| 9 |
X-direction grid length. |
xDirectionGridLength
|
| 10 |
Y-direction grid length. |
yDirectionGridLength
|
| 11 |
Scanning mode flag (see WMO
code table 8) |
iScansNegatively
jScansNegatively
jPointsAreConsecutive
|
| 12 |
Number of vertical coordinate parameters. |
NV
|
| 13 |
Projection centre flag:
0 North pole is on the projection plane.
Only one projection centre is used.
128 South pole is on the projection plane.
Only one projection centre is used.
64 North pole is on the projection plane.
Projection is bi-polar and symmetric.
192 South pole is on the projection plane.
Projection is bi-polar and symmetric.
|
projectionCenterFlag
|
| 14 |
First latitude from the pole at which the secant cone
cuts the sphere. |
firstLatitudeFromThePoleAtWhichTheSecantConeCutsTheSphereInDegrees*1000
|
| 15 |
Second latitude at which the secant cone cuts the
sphere. |
secondLatitudeFromThePoleAtWhichTheSecantConeCutsTheSphereInDegrees*1000
|
| 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:
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 |
Latitude of the southern pole. |
latitudeOfSouthernPoleInDegrees*1000
|
| 21 |
Longitude of the southern pole. |
longitudeOfSouthernPoleInDegrees*1000
|
| 22 |
Reserved. Set to 0. |
|
