Brian, Thanks for the review - comments inline:
> Document: draft-ietf-geopriv-geo-uri-04.txt > Reviewer: Brian Carpenter > Review Date: 2009-12-09 > IETF LC End Date: 2009-12-18 > IESG Telechat date: > > Summary: Ready > -------- > > > Comment: > -------- > > I'm sure this has been discussed and thought about, but it does strike me that > having a specific 20th century coordinate system as the default may seem a bit > odd in the future, if something like geo:13.4125,103.8667;crs=wgs2106 > becomes the norm. However, I have no changes to suggest. I might be inclined > to recommend including ;crs=wgs84 as best practice whenever such a URI is > included in a document or a database. We have discussed that issue several times on the list, as well as in person. Carl Reed voiced his opinion here: http://www.ietf.org/mail-archive/web/geopriv/current/msg07784.html What he also said in a different message (i couldn't find it, though) was that "84" doesn't mean WGS-84 is an "old school, soon to be obsoleted CRS" - if i understood it correctly, it was refined last in 2006 (for continental drift affecting the gravity model, if i got it right), and all differences will be in the centimeter range for the (geodetically) foreseeable future. The reference systems for GLONASS and GALILEO (russian and european satellite navigation systems) will also differ only in the millimeter range from WGS-84. I sort of got the impression "changing the default CRS to something else than WGS-84 is about as likely as changing the DNS to a new root..." (however, it's of course a completely different issue). We also decided it would be better to put the burden on reprojection on the author of a geo URI instance, rather than the consumer, because consumers should have less effort than authors (and very likely, there would be much more consumers than authors..) - choosing a reasonable default CRS helps tremendously. Alex _______________________________________________ Gen-art mailing list [email protected] https://www.ietf.org/mailman/listinfo/gen-art
