Home |  | Your Room |  | Login |  | Contact |  | Feedback |  | Site Map |  | Search: |  |
About Us Overview Getting here Committees | Products Forecasts Order Data Order Software | Services Computing Archive PrepIFS | Research Modelling Reanalysis Seasonal | Publications Newsletters Manuals Libraries | News&Events Calendar Employment Open Tenders
Home > Publications > Manuals > Grib API> |
|  | #
GRIB API Manual
Installation
Python
Fortran 90
C
GRIB Conversion
| GRIBEX keys
Keys
Examples
Tools

Software
BUFR
CREX
GRIBEX
GRIB API
Interpolation
Magics
Metview
SMS
Ordering forms
Software licence
Payment rules

Related Manuals
GRIBEX manual
Interpolation manual
Metview Manuals
Magics Manuals

Gaussian grids
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

| 22.10.2010-->-->

|  | © ECMWF |