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 is only for grid-point data: For example it does not make sense for spherical harmonic coefficients.
Also it is not implemented for all grid types. At the time of writing only the following are supported:
- Regular latitude/longitude
- Regular Gaussian
- Reduced latitude/longitude
- Reduced Gaussian
- Lambert conformal
- 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.
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 for each point of the gridlongitudes: An array with all the longitudes for each point of the gridlatLonValues: 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)