[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]
Subject: Re: [emergency] Groups - Updated CAP 1.1 issues
Art - Not to open a can of works (again), but below is a comment from a highly respected geospatial/IT expert in Australia. The comment is WRT use of WGS 84. While this comment was made in the context of some ongoing OGC standards work, I believe that it is germane to the work of this TC - both CAP and EDXL. Personally, I would like to see CAP as widely adopted as possible in the international community. I am therefore suggesting that we enhance CAP 1.1 (?) to allow specification of other coordinate reference systems. This could be done by references. I have proposed this numerous times. Perhaps now is the time to consider adding an optional element to CAP to allow specification of a CRS other than WGS 84. Cheers Carl The other contentful issue I would beg to differ on is the Annex B directive that WFS servers *must* support WGS84 "to enable interoperability across regional boundaries".Whatever you North Americans may like to think, jurisdictions in the rest of the world really do *not* keep all their data in WGS84 - for example, much Australian data is still stored in AGD84 (which makes it ~200m offset from WS84) and even for those jurisdictions that have updated to GDA94 there is an offset of ~2m which is small but still enough to cause problems with utilities.And either AGD84 or GDA94 is legally mandated.Cross-regional interoperability can only be ensured by a coordinate transformation service.Whatever the North American-based vendors would like to think, you just can't mandate global compliance to WGS84.
[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]