[Esip-documentation] Geospatial Bounds

[Bob Simons - NOAA Federal via Esip-documentation]

There are two issues:
1) Restricting WKT to longitude,latitude vs. allowing projection x,y values
(which would be appropriate for many CRSs). I agree that WKT allows for
either.  But ACDD can choose to be more restrictive.

2) The ordering of values for each point in the WKT: x,y vs y,x. My reading
the definitions of WKT indicates that it is always x,y(,z) and never y,x. I
understand that some CRSs have a y,x ordering in certain circumstances, but
I'm not convinced that applies to WKT which always says x,y. Again, ACDD
can choose to be clear about this and specify that it is always x,y
ordering.

On Tue, Oct 7, 2014 at 4:21 PM, Aleksandar Jelenak via Esip-documentation <
esip-documentation at lists.esipfed.org> wrote:

> On 10/7/14, 6:02 PM, “John Graybeal"
> <esip-documentation at lists.esipfed.org> wrote:
> >Ruling from the co-chair: since the lon/lat ordering is the WKT standard
>
> I don’t think it is. The document describing the WKT format is "OpenGIS
> Implementation Standard for Geographic information - Simple feature access
> - Part 1: Common architecture” (OGC 06-103r4, version 1.2.1, 2011-05-28)
> and in it the point is described as (x, y), where both x and y are
> described as signed numeric literals. What x and y means is solely
> determined by the CRS.
>
>         -Aleksandar
>
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>



-- 
Sincerely,

Bob Simons
IT Specialist
Environmental Research Division
NOAA Southwest Fisheries Science Center
1352 Lighthouse Ave
Pacific Grove, CA 93950-2079
Phone: (831)333-9878 (New as of 2014-08-20)
Fax:   (831)648-8440
Email: bob.simons at noaa.gov

The contents of this message are mine personally and
do not necessarily reflect any position of the
Government or the National Oceanic and Atmospheric
Administration.
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