In your previous mail you wrote: We have quite a bit of experience in the U.S. with what kind of GPS accuracy we can get. There are millions of phones and tens of thousands of calls annually using GPS positioning. It is quite difficult to achieve a 100 meter accuracy 95% of the time. Technology is improving all the time, but at the moment, carriers are struggling to achieve the regulatory mandate for 100 meter uncertainty, 95% confidence. => this just means a dedicated GPS receiver is far better than a phone (I am not very surprised :-). BTW if the (USA) regulatory mandates this performance the question is solved (at least in USA).
WGS84 is the most commonly used international datum. => yes but it is not the legal one in France for example (but the French one is compatible, i.e., differences are very small, and recent maps have extra WGS-84 info (aka "compatible GPS")). IETF emergency calling is based on IETF geopriv standards (see RFC4119), which specifies WGS-84. => if it is still time you have here a good way to fix possible future issue by referencing this (so if/when it should be updated only the RFC 4119 will be impacted). BTW the progress should not stop so I really believe in the "when": WGS-84 will get a successor one day... Thanks [email protected] _______________________________________________ Gen-art mailing list [email protected] https://www.ietf.org/mailman/listinfo/gen-art
