This is what the tool grib_get_data provides: A list of latitude-longitude-value triplets for a GRIB message. Note that you can also use the API to access this functionality: See examples.
This is also called a geo iterator (as opposed to the keys iterator)
This iterator However this is only for grid-point data: For example it does not make sense for spherical harmonic coefficients.
Also it does is not work implemented for all grid types. At the time of writing only the following are supported:
- Regular latitude/longitude
- Rotated latitude/longitude
- Regular Gaussian
- Reduced latitude/longitude
- Reduced Gaussian
- Lambert Conformalconformal
- Lambert azimuthal equal area
- Polar stereographic
- Mercator
- Space view
If the iterator is not implemented for an input field, grib_get_data prints just the data values (without the latitude/longitudes).
The full list of grid types are listed here: GRIB edition 1 and GRIB edition 2.
There are also some useful keys which use this iterator:
latitudes: An array with all the latitudes of the grid pointslongitudes: An array with all the longitudes of the grid pointslatLonValues: An array with all the latitudes/longitudes/values for each point of the grid
e.g. (lat1,lon1,value1, lat2,lon2,value2,..., latN,lonN,valueN)
The length of this array is 3 times the length of the previous two.
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