A Simple Data Visualisation

When you first start Metview, you will see something like this:

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This sort of window is called a Metview desktop.

If doing this tutorial outside of the ECMWF training course, download all data files and icons by clicking here:

They should be saved into your $HOME/metview folder. In the Metview user interface you should see an icon representing the downloaded files, which are compressed into a tarball. Right-click the icon and choose execute to uncompress the files.

Copy a GRIB data file into your Metview directory (~/metview); if you are attending the training course at ECMWF, then you can instead type the following command in a terminal window:

You should now see a new GRIB icon in your Metview window:

Introduction

A fundamental concept in Metview is the View. A View specifies the following definitions in a Metview plot:

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Without a View specification, Metview would not plot anything. If you do not provide a View, then Metview will use a sensible default View.

add a picture with 4 views and highlighting the above definitions

The current Metview version provides 8 Views specifications:

Fieldset Manipulation

A fieldset is a collection of fields stored physically in GRIB files. Metview has many built-in features to manipulate fieldsets, from simple arithmetic operators to vertical integrations through the atmosphere. The results can be stored on disk, or passed to other functions for further manipulation.

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