The Weather Symbol Editor is an experimental feature and you need to use this command to start the right Metview version for it:

some metview version

How to start the symbol editor?

Start uPlot and open the sidebar then select the Symbols tab:

How to add a new symbol to the map?

Just click on the symbol in the sidebar, the cursor changes into a cross, then click on the map to add the symbol.

Lines

When you are creating a line double click to conclude the creation.

Polylines, curves and fronts

When you are creating a polyline or a curve each left-click on the map adds a new point and double-click concludes the creation.

What kind of symbol are available?

Fitted geo-shapes

These are special shapes where all the vertices keep their lat-lon positions as the projection changes and the edges between them are sampled linearly in lat-lon space. It means that in cylindrical projection the edges are always straight lines, while in other projections they might be curves. The following table shows how a fitted geo-shape changes as the projection changes from cylindrical to polar north:

Geo shapes

In these shapes all the vertices keep their lat-lon positions as the projection changes and they are always connected with a straight line (or with a B-Spline for curves) in all the projections.

The geo rectangle is a special object because it always keeps it rectangular shape. It means that if we zoom the lat-lon positions of the corner points do not change. However, if we change the projection the lat-lon positions of the corners are automatically adjusted so that the shape could be a rectangle in the new position.

Markers and text

For these objects only the centre (for the text the top left corner) keeps its lat-lon position as the projection changes, while the extent is defined in terms of pixels.

Surface analysis

This is a collection of curves standard meteorological curves and symbols.

WMO symbols

All the WMO weather symbols are available here. They behave like markers, i.e. their centre is keeping its lat-lon position when the projection changes and extent is defined in pixels.

Can I add my own symbols?

You can use any square shaped SVG or PNG file as a symbol. These have to be added to the System/Symbols folder in your Metview home directory. When you start a uPlot window it scans this directory  and add all the files with .*svg or *.png  suffix to the Markers and text group in the Symbols sidebar.

How can I edit the symbols?

Single click on the symbol: it gets into edit mode where you can move and resize it and edit its graphical properties from the ribbon editor at the top of the view area.

Can I rotate the objects?

It is not yet available.

Is redo-undo available?

It is not yet available.

How to generate a PNG or PDF from the scene?

Just use the Export button in toolbar and choose between the PDF_QT or PNG_QT output formats.

How can I save the edited objects for later reuse?

It is not possible at the moment, so you will lose all the objects when close the uPlot window.