View Map Layers
This sub-menu of the View menu enables and disables various layers
of the map display, so the user can display only the information of
interest. Note that stations and objects are filtered by the Filter
The different optional parts of the map include:
- enable/disable showing the latitude/longitude graticule (grid).
- enable/disable displaying range circles around transmitting stations.
- enable/disable displaying track stripes along the recorded travel path of all moving stations.
- enable/disable displaying dead-reckoned positions of moving stations
without a current position message. This dead-reckoning only continues for a user-configurabled period
of time, specified on the expert-mode configuration dialog's Preferences tab.
- enable/disable displaying direction-finding (DF) radials for stations reporting
direction finding information, or listening area for stations reporting omni-DF
information (DFS data extension). Radials will be plotted as yellow translucent cones
of ambiguity with orange boresite (centerline) radial lines in the direction reported; omni-DF stations will be
backed by a translucent checkerboard-patterned circle color-coded by the signal strength level reported:
Note that it is probably advisable to turn off the position ambiguity areas when
analyzing omni-DF station reports, as the circles may blend together, making it difficult
to determine the coverage and heard signal strength for any given omni-DF station.
|S9 and higher||red|
- enable/disable displaying the age (time since last received packet) underneath each station's callsign.
- enable/disable displaying the bearing and speed of underneath each mobile station's callsign.
- enable/disable displaying National Weather Service multi-line polygons
and polylines. These are encoded in messages from the NWS; the different
colors and line types correspond to the following weather conditions:
|d||yellow||solid||severe thunderstorm warning|
|e||yellow||dashed||severe thunderstorm watch|
|k||green||dashed||mesoscale discussion area|
|m||orange||wide solid||YAAC's Aloha circle|
|n||orange||wide dashed||YAAC's incomplete Aloha circle|
|darker blue||solid||small craft warning|
|darker cyan||solid||flood warning|
|darker cyan||dashed||flood watch|
|darker cyan||solid||flash flood warning|
|darker cyan||dashed||flash flood watch|
|yellow||solid||high winds warning|
|yellow||dashed||high winds watch|
- enable/disable displaying active severe weather zones as transmitted in US National Weather Service status messages.
Note that for US NWS zone boundaries to be displayed, you will need to download the
marine zone shapefile sets from
the National Weather Service website at https://www.weather.gov/gis/AWIPSShapefiles
and unzip the zip files into your configured tile directory.
- enable/disable displaying the Aloha circle (maximum coverage range that would
saturate the communications channel). Note that if you have more than 1 RF port (such as for a
cross-band digipeater), multiple Aloha circles will be displayed (one for each RF port), based on the
traffic heard through each port.
- enable/disable displaying position ambiguity areas behind
limited-accuracy positions, using a translucent version of the most common color in the symbol icon. This layer
and the DF (direction finding) layer should not both be on when analyzing omni-DF stations.
- enable/disable displaying color-coded status of stations and
objects on the map by background color circles. The status colors are:
|white||fixed (non-moving) station|
|dark cyan||dead-reckoned moving station|
|gray||old station not updated for more than 80 minutes|
|red||station reported an emergency ("EMERGENCY" in comment or Mic-E position report with emergency status code)|
|yellow||object transmitted by this local YAAC station|
|purple||object transmitted by some other station|
- enable/disable displaying color-coded Mic-E status of stations on
the map by rings around the station. Standard Mic-E statuses are solid rings,
and the Mic-E custom codes are dashed (broken) rings. The colors are:
|green||M2: in service|
|cyan||M1: en route|
|gray||M0: off duty|
- draw the symbols for stations and objects double-sized (to make it easier to find them on the map).
- draw the digipeat hop paths between packet-originating RF stations and the local station (note this
only is meaningful and works only for packets received from RF by the local station, not via the Internet).
- display "killed" objects and items after their kill
times, or only currently active objects/items.
- use the locally defined aliases (such as tactical callsigns) for stations and objects instead
of the actual callsign or object name; when aliases are displayed on the
map, they are displayed in blue (rather than the black text used for
station license callsigns and object names).
- selectively enable drawing different types of information from
the OpenStreetMap database, individually controlling different types of
OpenStreetMap Ways (continuous polylines or areas) (including the zoom scale at which
the different types will start being displayed and labelled)
OpenStreetMap Nodes (single points with descriptive attributes)
and geographic labels of regions and points in the map, such as city and
country names (specifying the zoom levels between which each level of
political hierarchy will be labelled).
- selectively enable drawing terrain elevation either as color-coded background and/or
contour lines. The colors and thresholds for color changing of terrain levels can also be customized.