GRIB API Manual
Author: $Author: Enrico Fucile $
Keywords: webgroup documents

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GRIB API Manual
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Interpolation manual
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Space view perspective or orthographic
Element | Contents | GRIB API keys
--- | --- | ---
1 | Data representation type (see WMO code table 6); = 90. | gridType
2 | Number of points along the x-axis. | Nx Ni
3 | Number of points along the y-axis. | Ny Nj
4 | Latitude of the sub-satellite point. | latitudeOfSubSatellitePointInDegrees*1000
5 | Longitude of the sub-satellite point. | longitudeOfSubSatellitePointInDegrees*1000
6 |
    Resolution flag:
     0       Direction increments are not given.
     128     Direction increments are given.
| ijDirectionIncrementGiven*128
7 | Apparent diameter of the Earth in grid lengths in x direction. | apparentDiameterOfEarthInGridLengthsInXDirection
8 | Apparent diameter of the Earth in grid lengths in y direction. | apparentDiameterOfEarthInGridLengthsInYDirection
9 | X-coordinate of the sub-satellite point. | xCoordinateOfSubSatellitePoint
10 | Y-coordinate of the sub-satellite point. | yCoordinateOfSubSatellitePoint
11 | Scanning mode flag (see WMO code table 8). | iScansNegatively jScansNegatively jPointsAreConsecutive
12 | Number of vertical coordinate parameters. | NV
13 | The orientation of the grid. | orientationOfTheGridInDegrees*1000
14 | Altitude of the camera from the Earth's centre divided by the Earth's radius and scaled by 10**6 to give an integer value. Currently = 6610839 for Meteosat. For orthographic view from infinite distance, the value is 16777215. | altitudeOfTheCameraFromTheEarthSCenterMeasuredInUnitsOfTheEarth
15 | X coordinate of the origin of the sector image. | xCoordinateOfOriginOfSectorImage
16 | Y coordinate of the origin of the sector image. | yCoordinateOfOriginOfSectorImage
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.
| uvRelativeToGrid
20-22 | Reserved. Set to 0. |

| 22.10.2010-->-->

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