so ive been messing with APRS for about two months now and got my TM-D710G set up with the internal TNC and everything seemed fine at first. my beacon was showing up on aprs.fi which was cool but then i noticed the position dot is like 4 miles east of where i actually am. i double checked my coordinates in the radio menu like three times and they match my actual location so im not sure what's going on there.

also running direwolf on a raspberry pi as a secondary igate and that one seems to place me correctly when i use that path instead. so something is definitely weird with how the radio is encoding the position or maybe its a datum thing? i dunno. the symbol is set to a house which is right at least. anyone run into this before with the D710 specifically or just APRS position weirdness in general

yeah this is almost certainly a datum issue. the D710 defaults to Tokyo datum in some firmware versions and if you didnt change it to WGS84 your coords will be off by varying amounts depending where you are geographically. dig into the GPS setup menu, theres a datum selection buried in there. had the exact same thing happen to me when i first got mine, drove me nuts for weeks before someone at the club pointed it out.

also worth checking if youre using compressed vs uncompressed position format. shouldnt affect accuracy but ive seen some weird edge cases. but honestly 99% chance its the datum thing.

not sure about the D710 specifically but i had a similar problem with a completely different setup and it turned out i had entered my coordinates in the wrong format — like i had decimal degrees but the radio wanted degrees and decimal minutes. easy mistake to make. might be worth double checking that even if it looks right on the screen