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The GRIB icon reduced_gg_320 contains one field which is stored as a reduced Gaussian grid. Visualise the field and apply the grid_1x1 gridpoints icon (in the solutions folder) to display the locations of the grid points.

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The result will be the same data interpolated onto a 2x2 degree grid. Visualise the result and apply the grid_1x1 gridpoints icon to confirm the new grid. Visualise the two fields side-by-side with coloured contour shading to also confirm that they look very similar in terms of their data values.

Conversion Between Points and Fields

Metview provides two icons, Geopoints to GRIB and GRIB to Geopoints for the purpose of converting between GRIB (gridded) and geopoints (scattered) formats.

Use a GRIB to Geopoints icon to convert the result of the last exercise to geopoints format. Examine the result to confirm that it is now geopoints and that we have a list of all the individual points.

Use a Geopoints to GRIB icon to convert the geopoints result of the fc_obs_diff icon to GRIB.

Extra Tasks

Computing relative differences

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