I am considering submitting a talk/lightning talk/poster to useR! (deadline March 14 CET) on the imminent confusion that will hit Geospatial packages in R when NAD83 is replaced by modernized NSRS in North America, and the ETRS89 standard being considered as a datum ensemble in Europe.
I would like to ask for help in submitting and for some input to a "task force" to try to prepare for oncoming changes. See R-sig-geo post and/or https://github.com/rsbivand/new_ref_systems



