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Introduction
The intention behind this page is not to advertise the new features of Metview 4 (see Version 4 Complete Change History for this), but to help users migrate existing plots and macros from Metview 3 to Metview 4. In general, icons and macros which do no plotting should require very little, if any, modification. Many icons and macros used to produce plots will likewise require little or no modification, but some will need to be updated. These changes, plus some other points of interest are briefly described on this page.
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Instead of a single output function, Metview 4 uses a set of functions to specify the desired output format, one for each type: ps_output, png_output, etc. One way to see the possible parameters for these functions is to type the appropriate function name in the Macro Editor and press F5 for an interactive help tool.
Limitations
There are some functionalities in Metview 3 which are not yet available in Metview 4, even with workarounds.
- Tephigrams are not available
- Native plotting support for satellite projection images - the workaround is to use the Reprojection module to reproject the data onto a regular lat/lon grid, then plot this onto a Geo View using the Geos projection. This is currently limited to having its centre at zero degrees longitude.
- Hovmoeller, cross section, zonal/meridional mean and vertical profile plots only generate a plot for the first set of data supplied. In Metview 3 for instance, you could supply a time series of vertical level data to the Cross Section module and receive one plot per time step; now, only the first time step will be plotted. The workaround is to write some Macro code to loop through the steps/parameters/etc and generate one plot at a time.