Things to document:
- new projections
- axis plotting
- cross sections, etc (4.4)
- annotation view (4.4)
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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This is perhaps the area which has experienced the greatest change. Curve plotting is now achieved via one of the Visualiser icons. The Curve View is replaced by the more general-purpose Cartesian View. There is a Macro example which shows, side by side, Metview 3 and 4 code for plotting curves - Migration: Curve Plotting.
Axis Plotting
In Metview 3, the Axis icons determined the coordinate system for a non-geographical plot. In Metview 4, the Cartesian View icon defines this aspect of the plot, whereas the Axis icons only affect the plotting attributes of the axes. This is a cleaner concept, and more consistent with other View icons - the View icons define the projection and the Visual Definition icons determine the colour, line style, etc.
Symbol Plotting
The new Symbol Plotting icon provides access to a particularly useful feature of Magics - Advanced symbol plotting mode. This allows the automatic creation of colour scales in much the same way as is available for contouring. In Macro, psymb is replaced by msymb.
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These icons are currently restricted to returning a single frame (Metview 3 could, for instance, return a set of cross sections if there were multiple parameters or times in the input data). This feature is in the process of being implemented, and further documentation will be is available specifically for the 4.4 release of Metview, which contains further small revisions to the interface. See New Cross Section, Average and Vertical Profile modules in Metview 4.4.
Display Window Contents
The Display Window's Contents drawer was an advanced feature which enabled the quick fine-tuning of a plot. This feature is not currently enabled in Metview 4, although it is planned to be in the future.
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