How far to the nearest station?
If you know the city well, you already know where the stations are. But which is closest (as the crow flies) to where you are now?
https://hugovk.github.io/helometer
In another terminal:
$ python3 -m http.server 8060
# Or:
$ python2 -m SimpleHTTPServer 8060
Then to allow geoposition to work in a non-HTTPS browser:
/usr/bin/open -n "/Applications/Google Chrome.app" --args "http://0.0.0.0:8060" --unsafely-treat-insecure-origin-as-secure="http://0.0.0.0:8060" --user-data-dir=/tmp/testprofile