On top of the page are the controls to change the look and some of the functionality of the page. Some controls may or may not be available, depending on whether a database is used as data source or not (when the page loads, all are visible until the stations have been loaded). The demo running on SourceForge.net uses a database, so here are described only the controls which are available with a database.
Below the controls there's a map of the world (or a part of it) with clickable circles and squares. Next to the map is a list of additional stations; they cannot be displayed on the map because their coordinates are not in the database.
Below that are shown the translated weather messages of the stations, if any have been fetched.
The map shows an equirectangular projection of the world, or a section of it (image source: DEMIS Mapserver). The size of the map window can be set by the window size control. The enlargement can be set by the enlargement control. If an enlargement bigger than 1 is selected, the map can be moved with click & drag or by clicking on the 4 controls with arrows surrounding the map.
On the map, there are circles of various colors and squares. They represent one or more stations with messages and are placed, and the list of additional station is filled, when the page is (re-)loaded or update stations is pressed.
The circles and squares have the following meaning:
fixed station reporting METAR/TAF
fixed station reporting SYNOP
fixed station reporting METAR/TAF and SYNOP
mobile station reporting SYNOP SHIP
mobile station reporting SYNOP MOBIL
buoy reporting BUOY
buoy reporting SYNOP SHIP
aircraft reporting AMDAR
2 or more stations located very close together even at highest enlargement
2 or more stations located very close together at the current enlargement
When the mouse pointer is over a circle, the information for the station(s) is displayed just below the map. This includes the identification of the station, its name or description (if known), the coordinates and elevation (if known) and the type(s) and time(s) of the latest message(s) within the time period for which the station list was last updated.
If a circle is clicked on, the messages within the currently defined time period are fetched from the database, translated using the currently selected language and displayed below the map, above previously fetched messages. For SYNOP, only the type of messages chosen via the presetting are displayed.
If a square is clicked on, the enlargement is increased by 3 steps (or less, up to the highest enlargement) and the map is centered at the center of the square.
To save resources, the map is divided into tiles. Only those tiles which are currently visible have their image for the world map and have circles for stations. For the same reason, in the 3 lower enlargements only circles for multiple stations and circles for stations having an identification for both METAR/TAF and SYNOP are shown.
Translated messages for a station can be hidden with and shown again with . They can be removed with . If the coordinates of the station are known and the station information is clicked on, the map enlargement is set to maximum and centered to the station.
Initially, the messages are shown as overview. The detailed view for a message can be shown and hidden again using the button to the left of the message.
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