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

Mercator
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. |

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

| 22.10.2010-->-->

|  | © ECMWF |