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- SYMBOLS.txt 6.0 APRS DISPLAY SYMBOLS
-
-
- APRS supports a number of different display symbols for differentiating
- objects on the map. The symbol type is indicated by the 44th character in the
- APRS standard position report. Although these special characters are
- automatically inserted into the APRS position reports, they are specified here
- for manual TNC stations. Remember that any TNC can still show up on APRS maps
- and displays as long as a properly formatted APRS position report is placed in
- the TNC BText. By placing one of these special characters as the delimiter
- after the LONGITUDE field, a station with only a dumb terminal can control his
- appearance on other APRS displays. For more information on manually formating
- APRS reports using only a dumb terminal, see the README.DUM file. The
- following table describes the symbols available and the special characters
- used to represent them. Notice that there are several generic shapes without
- designated descriptions, so that users can tailor their symbology to the
- particular APRS net application. If you have any suggestions for other
- symbols, please send them in...
-
- NOTE! Any particular symbol only has the meaning defined by the APRS net that
- is using it. So DO NOT INFER that an EMERGENCY or QUAKE symbol is a bonafide
- emergency! I particularly like to use the QUAKE symbol to indicate a location
- of special interest to everyone. The quake symbol is simply a bull's eye.
- At Dayton, for example, we used the Bull's eye to mark the location of the
- HARA arena! Specific symbols like TORNADO and HURICANE which ARE specific
- shapes should use the object name of TEST or similar if not real, to avoid
- exciting people unnecessarily...
-
- SYMBOLS ON MAPS! Not only can APRS symbols represent stations and objects
- off-the-air, they can also be permanently embedded in maps. To embed a label
- in a map, simply make the first three characters of the label be a $ followed
- by the symbol character, followed by a hexidecimal number from 1 to F that
- indicates the desired color for the symbol. The remaining 8 characters can
- be used for a conventional label at the same location. An example are the
- VORTAC nav-aids in Alaska. The Anchorage VORTAC appears as ANC on all maps
- below 128 miles. The label entry is $VFANC,LAT,LONG,128.
-
- AREAS ON MAPS! New in version 6.0, you can define BOX/CIRCLE/LINE or TRIANGLE
- areas in all colors, either open or filled in. They can be any size from 60
- feet up to 100 miles. Simply move the cursor to the location, press HOME,
- move the cursor to te lower right corner of the AREA and hit INPUT-ADD-OBJECTS-
- AREA. You will be prompted for the type of area shape, and the color. Please
- note that AREA shapes can only be defined by selecting the upper left corner
- first, then the lower right second. The line is an exception. It is still
- top to bottom, but the lower point can be to the left of the beginning point.
- These symbols are useful for defining areas on MAPS in real-time to everyone
- in the net. For example, defining the area for a search-and-rescue, or adding
- a special ROAD or ROUTE for a special event. Be cautious in using the color
- fill option, since all other objects in that area that occur earlier in your
- PLIST will be obscured. AND you do NOT know the order of other stations P-
- lists. See the section below SHAPES, BORDERS, etc for details.
-
- SYMBOLS WITH STAND-ALONE GPS TRACKERS: Since the stand-alone GPS/PACCOMM TNC
- trackers output the raw GPS data over the air, instead of an APRS formatted
- position report, there are two methods that I have included for you to be able
- to specify the symbol type. The first, is to simply place the desired symbol
- character surrounded by braces as the first 3 characters of the TNC BText.
- Once the BText has been received, all stations will begin to use that symbol
- for all position reports from that station. Secondly, there is a default
- SSID convention which will be used if no other position data is available
- according to the following table:
-
- SSID DISPLAY SYMBOL
- -4 Bike
- -5 Helo
- -6 Yacht (sailboat)
- -7 Aircraft
- -8 Ships (powerboats)
- -9 Cars
- -10 Space (orbiting objects)
- -11 Balloons
-
-
- The actual symbol character used in the APRS position report formats are
- shown in the following table. The special character is the character that
- represents the symbol and is what is transmitted as the 44th character in an
- APRS formatted position report:
-
- SYMBOL TYPE SPECIAL CHARACTER COMMENTS
- ------------ ----------------- -----------------------------------
- BOXES 0-9 Useful for close in ops since each one is
- CIRCLES A-K unique and therefore you don't need calls
- AIRPLANES ' Also for all -7 SSID's (heaven)
- ADVISORY(smallcrft) <
- AMBULANCE a
- ANTENNA (radio) r
- AREAS l Can be Circle,Line,Box etc
- BBS [
- BALLOONS O
- BIKES b
- BUS U
- CALLSIGNS c Results from Callsign database in DX mode
- CIRCLE o Default for NMEA reporting stations
- CLOUDY ( "
- DIGIpeaters #
- EMERGENCY !
- FIRE : added for stations in Calif
- FIRE DEPT d
- FLOODING w "
- FOG f "
- GALE WARNING g "
- GATEWAY &
- GRID SQUARE q four digit
- GRID SQUARE ? six digit
- HUMP ) Generic shape
- HURRICANE @
- HELO X
- HOSPITAL h
- IOTA i Islands-On-The-Air
- TCPIP }
- Jay (J) , Generic shape
- JEEP j
- Kross + More like a RED CROSS
- Location . generic
- MAILBOX ] PBBS's etc
- NODE's x
- OBJECT / Default symbol
- PARTLY CLOUDY?SUNNY p "
- POLICE P
- PORTABLE ; Looks like a tent
- QTH -
- RAIN " "
- RAIL = trains, etc
- RecreationalVehicle R
- SAIL Y like a yacht
- SHIP s Also for all -8 SSID's
- SCHOOL K
- SNOWFLAKE * "
- SUNNY $ "
- SLEET e "
- TRIANGLE \ DF STATION: CSE and SPD will show BEARING
- TORNADO t
- THUNDERSTORM ` All of the following symbols are included
- TRUCK k
- U u Generic shape
- VEHICLE > Also for all -9 SSID's (engn, engn, #9)
- VAN v
- VORTAC V Aircraft naviagtional aid
- WEATHER _ (I used underline for ground conditions)
- DX Cluster %
- YACHTS (sailboats) Y for SAILBOATS
- Z z Generic shape
-
-
- 4 Char grid SQ q No symbol for 4 digit Grid Square reports
- 6 Char grid SQ ? No symbol for 6 digit Grid Square reports
- (this preserves the ambiguity of GS rpts)
- (note that these symbols are NOT xmted)
-
- Note that Weather stations will always show up as blue. This overides all
- other APRS colors. Weather stations will also not be dead reckoned since
- their course and speed indicates wind conditions and not station movement.
- I also made the sun show up as yellow overriding all other color conventions.
-
- SHAPES BOUNDARIES AND BORDERS
-
- In version 6.0, I have added a new format for specifying special areas.
- These shapes can be a rectangle, circle and triangle (for now) and can be any
- color and any size from 100 miles down to 60 feet. Since these shapes will
- be used to draw borders on the maps and to indicate boundaries, etc, they will
- not move. Therefore, I have used the CSE/SPD field to provide the additional
- information needed. Here is the definition:
-
- $CSE/SPD... Normal Field description
- lTyy/Cxx... Where: l (lower case L) is the symbol for "LOCATION SHAPES"
- T is the Type of shape: 0=circle, 1=line, 2=elipse
- 3=triangle 4=box
- add 5 to these => color-in
- C is the color from 0 to 15. For colors geater than
- 9, the / is replaced with a 1.
- yy is the sqroot of the latitude offset in 1/100ths
- xx is the sqroot of the longitude offset
-
- These offsets are ALWAYS positive to the right and down, except for the
- special case of a lower right quadrant line, these are given the Type of 6
- and are drawn down and to the left.
-
- EXTENSION ALPHABET: Also in version 6.0 I have begun the definition of a
- alternate symbol alphabet. This alternate alphabet is indicated by the @
- character to replace the / character between the CSE and SPD fields. This
- adds the restriction that new symbols that are NOT moving will still require
- a $000@000 course and speed field where, before, it was optional. So far,
- I have NOT defined any new symbols to use this alternate alphabet. But if
- you just GOTTA have that special symbol, lemme know. Now there is room to
- add it.
-
-