adam, thank you for diving into this. when you do 'apt purge weewx' it is *supposed* to delete the debconf variables. somehow yours did not. there is logic in the weewx postinst maintainer script that is *supposed* to clean user inputs, but that logic does not validate latitude/longitude. i will add that to postinst.
fwiw, if you need to purge debconf values *without* touching the rest of the dpkg/apt installation state, you can do this: echo PURGE | sudo debconf-communicate weewx or, even more selectively: echo RESET question | sudo debconf-communicate weewx where 'question' is one of the prompts, e.g., 'latlon' or 'altitude' or 'station_url' m -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/465a120f-2e72-4b10-97a4-32703cf4b9ecn%40googlegroups.com.