On 17 Jun 2005, at 00:35, Bullard, Claude L (Len) wrote:
> 1. With the reference element, the software has a standard way to
> notice different systems.
> 2. Without the reference element, the different systems can't
> interoperate.
I strongly agree with Len. Perhaps a good compromise is to add explicit
(attribute)
information that indicates the spatial reference system used by the
element, and that it is the external edge?
Eg <polygonExt srsName="urn:ogc:def:crs:OGC:1.3:CRS84"> 22, -22 ....
</polygonExt>
In our case, we can state that the attribute is mandatory and fixed.
Cheers... Renato Iannella
Project Leader, NICTA, Brisbane, QLD, AUSTRALIA
P: +61 7 3000 0484 F: +61 7 3000 0480 M: +61 4 1313 2206
E: W: http://nicta.com.au
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