Hi,
A note for the list, since this may pop up again: ggtern is not abandoned, and
is back on CRAN. The active development repo is on bitbucket at
https://bitbucket.org/nicholasehamilton/ggtern/src/master/
There is also a github repo https://github.com/nicholasehamilton/ggtern that is
not
ther or not the resource recovers.
The issue is that the WCS server from which the package retrieves data
sometimes gets overloaded, and throws a 502 error. I currently use a
stop(message)) to return the http error code to the user, e.g. here -
https://github.com/obrl-soil/slga/blob/a770dac9f101995db92e
