This page is still work in progress!
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:
Shape | Cylindrical | Polar North |
---|---|---|
Geo Line | ||
Geo Polyline | ||
Geo Polygon | ||
Geo Quad The corner points always form a rectangle in the lat-lon space. |
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 its 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 projection.
Object | Cylindrical | Polar North |
---|---|---|
Line | ||
Geo rectangle |
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.
Object | Cylindrical | Polar North |
---|---|---|
Text | ||
Placemark |
Surface analysis
This is a collection of 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 adds 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.
How can I edit the point on a polyline, curve or front?
Double click the symbol and the control points become visible. You can drag them now to a new location.
You can add/remove points to a curve when you are in the point edit mode. Right click on a control point and use the action in the context menu:
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 the 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.