Tuesday, January 17, 2017

APRS Symbol Look Up Table

Click to Enlarge
In APRS, symbols on the map are encoded as two ASCII characters. The first character selects the table (primary or secondary) and the second character selects the symbol from that table. (The table selector can also be used as a alphanumberic overlay on top of the secondary table)

The symbol list is available online here, but I've always wanted an easy-to-use graphic with the symbol codes and the icons right next to each other. I finally broke down this week and created the image you see above based on Hessu's great APRS vector symbol set. Click on the table to see it in full resolution.

To use this table, simply find the icon you want to use, read off the symbol code above it, and use "/[symbol code]" if it's in the middle square and "\[symbol code]" if it's in the bottom square.

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