| Element |
Contents |
GRIB API keys
|
| 1 |
Data representation type (see WMO
code table 6); 1 for Mercator |
gridType
|
| 2 |
Number of points along a parallel. |
Ni
Nx
|
| 3 |
Number of points along a meridian. |
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 are not given.
128 Direction increments are given.
|
ijDirectionIncrementGiven*128
|
| 7 |
Latitude of the last grid point. |
latitudeOfLastGridPointInDegrees*1000
|
| 8 |
Longitude of the last grid point. |
longitudeOfLastGridPointInDegrees*1000
|
| 9 |
Latitude at which the Mercator projection cylinder
intersects the Earth(Latin). |
latitudeAtWhichTheMercatorProjectionCylinderIntersectsTheEarthInDegrees*1000
|
| 10 |
Reserved. Set to 0. |
|
| 11 |
Scanning mode flags (see WMO
code table 8) |
iScansNegatively
jScansNegatively
jPointsAreConsecutive
|
| 12 |
Number of vertical coordinate parameters. |
NV
|
| 13 |
i direction grid length. |
longitudinalDirectionGridLength
|
| 14 |
j direction grid length. |
latitudinalDirectionGridLength
|
| 15-16 |
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
|
| 20-22 |
Reserved. Set to 0. |
|
