How to use the Weather Symbol Editor in uPlot?

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 defined by a lat-lon position and the edges between them are sampled linearly in the 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 are defined by a lat-lon position 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.