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NetCDF is a binary file format for storing multi-dimensional arrays of data and has enjoys wide academic usage.
Examining netCDF
Right-click on the supplied netcdf.nc icon and choose examine to see its structure. It consists of multi-dimensional variables, each of which has its own set of attributes; the file also has a set of global attributes.
Visualising netCDF
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Create a new NetCDF Visualiser icon. Edit it and drop the netcdf.nc icon into the NetCDF Data field. Set the following parameters:
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Metview uses netCDF internally for the results of some computations. In particular, the analysis views (e.g. Cross Section View, Vertical Profile View) do this, but their result data is not available to the user. Therefore, each of these views has a corresponding Data view. If the intention is to simply plot the result, then the View icons are more useful. But to store the result data, the Data icon is required.
Create both a Vertical Profile View and a Vertical Profile Data icon and edit both to see the differences. All the parameters related to the visualisation of the result are only in the View icon, and the Data parameter exists only in the Data icon.
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A filter function to extract a subset of its geopoints input using a second geopoints as criteria. The two input geopoints must have the same number of values. The resulting output geopoints contains the values of the first geopoints where the value of the second geopoints is non-zero. It is usefully employed in conjunction with the comparison operators :
The variable
will contain a subset of temperature where the value is below 273.15. |
Use this in combination with what you have already done to produce a geopoints variable consisting only of the points within 10km of your chosen location. Plot the result to confirm it.
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