[Proj] Proj4 and Epoch

Martin Desruisseaux martin.desruisseaux at geomatys.com
Tue Mar 8 20:19:56 EST 2016

Le 09/03/16 02:01, Greg Troxel a écrit :
> But the biggest thing I realized is that there don't seem to be EPSG
> codes for the different WGS84 realizations, so the first agenda item is
> to resolve whether to push EPSG to do that or to model them outside of
> EPSG or to decide that all WGS84 realizations are equivalent for proj
> purposes.

For information, the EPSG team is aware of this issue. Roger Lott, from
IOGP, briefed us on this topic in the previous OGC meeting three months
ago. The issue is deeper than just creating new EPSG codes as it may
require a revision of the ISO 19111 conceptual model. There is
discussion in OGC right now about creating a new Standard Working Group
(SWG) for this purpose. But I do not know how long it would take to
complete the work - except that it would not be this year.


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