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GRIB-API support is being discontinued at the end of 2018. Please consider upgrading to ecCodes


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ElementContentsGRIB API keys
1Data representation type (see WMO code table 6) = 1gridType
2Number of points along a parallel.Ni
Nx
3Number of points along a meridian.Nj
Ny
4Latitude of the first grid point.latitudeOfFirstGridPointInDegrees*1000
5Longitude of the first grid point.longitudeOfFirstGridPointInDegrees*1000
6
Resolution flag:
0 Direction increments are not given.
128 Direction increments are given.
ijDirectionIncrementGiven*128
7Latitude of the last grid point.latitudeOfLastGridPointInDegrees*1000
8Longitude of the last grid point.longitudeOfLastGridPointInDegrees*1000
9Latitude at which the Mercator projection cylinder intersects the Earth(Latin).latitudeAtWhichTheMercatorProjectionCylinderIntersectsTheEarthInDegrees*1000
10Reserved. Set to 0. 
11Scanning mode flags (see WMO code table 8)

iScansNegatively

jScansNegatively

jPointsAreConsecutive

12Number of vertical coordinate parameters.NV
13i direction grid length.longitudinalDirectionGridLength
14j direction grid length.latitudinalDirectionGridLength
15-16Reserved. Set to 0. 
170 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
20-22Reserved. Set to 0. 

 

Grid lengths are in units of metres, at the parallel specified by Latin

 

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