Rob Atkinson wrote:
ahh - this is serius issue in the specifications front...
I think the behaviour is correct.
The OGC specifies that the urn: referenced coordinate systems should
always be interpreted as Lon/lat order,
oops - i meant lat/lon - getting tripped up myself...
in conformance to the EPSG "definition" - though they dont also
specify that it should be in Degrees/Minutes/Seconds which EPSG also
states.
I argued at the time that coordinated was not part of the
_definition_ but a _presentation rule_ and its nonsensical to choose
an arbitrary piece ofthe presentation as part of the definition..
So. EPSG:4326 is not the same as
urn:x-ogc:def:crs:EPSG:6.11.2:4326
Only EPSG:4326 should be interpreted according to WMS version. I cant
remember right now whether there was an explicit rule for GML 2 vs 3,
WFS 1.0 vs 1.1.
The European INSPIRE program is going to mandate WMS 1.3, every known
WMS supports 1.1 because its too hard to work out what you should be
doing for 1.3 (how should a getFeatureInfo response be encoded?)
Actual practice seems to be, if people are using
urn:x-ogc:def:crs:EPSG:6.11.2:4326
then they will also encode the lon/lat ordering, otherwise they will
use the more natural lat/lon.
So, the flag only applying to EPSG codes, probably only for specific
protocol versions, is best behaviour in such a crazy world.
Rob A
Justin Deoliveira wrote:
Hi Martin,
I am not sure but I think Andrea may have brought this issue up with you
before. But he is on vacation at the moment so I will ask you.
The problem that I am running into is that in GeoServer we use the hint
the to switch the axis of 4326. However when a WFS request comes in with
the srsName of:
"urn:x-ogc:def:crs:EPSG:6.11.2:4326"
The hint does not seem to apply and the coordinate system axis are not
swapped. This is a problem because it retults in a conversion between
the two and all geometry x,y values are swapped.
I seem to remember this being a problem with the hints not applying to
an adapter of some sort?
Any idea Martin?
Thanks,
-Justin
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