[Geoserver-users] Get rid of CRS:84

Premysl_Vohnout · April 11, 2013, 1:59pm

Dear all,
I would like to know how I can get rid of CRS:84 in my GetCapabilities for WMS

http://www.habitats.cz/geoserver_habitats/wms?service=WMS&request=getCapabilities&version=1.3.0

As you can see there is list of available CRS:

<CRS>EPSG:102067</CRS>

<CRS>EPSG:3035</CRS>

<CRS>EPSG:3875</CRS>

<CRS>EPSG:4326</CRS>

<CRS>EPSG:900913</CRS>

<CRS>CRS:84</CRS>

but in web interface in “Limited SRS list” is only 4326, 3035, 102067, 900913, 3875.

So does anybody knows how to cut it out?

best regards
Premysl

Jonathan_Moules2 · April 11, 2013, 2:54pm

I’ve had similar feelings in the past; ArcGIS defaults to CRS:84 if its there, ignoring whatever you specified or the native one is.

I’m not sure if its possible, but the WMS spec says:

To maximize interoperability among servers, providers
should also support geographic coordinates by geocentric coordinate systems such as “CRS:84” (see 6.7.3.2),
“EPSG:4326” (see 6.7.3.3) or other ITRF-based systems.

So depending on what “should” means, it may be hard-coded. Hopefully someone knowledgeable about the implementation will chip in.

Jonathan

On 11 April 2013 14:59, Premysl Vohnout <vohnout@anonymised.com> wrote:

Dear all,
I would like to know how I can get rid of CRS:84 in my GetCapabilities for WMS

[http://www.habitats.cz/geoserver_habitats/wms?service=WMS&request=getCapabilities&version=1.3.0](http://www.habitats.cz/geoserver_habitats/wms?service=WMS&request=getCapabilities&version
=1.3.0)

As you can see there is list of available CRS:
<CRS>EPSG:102067</CRS>
<CRS>EPSG:3035</CRS>
<CRS>EPSG:3875</CRS>
<CRS>EPSG:4326</CRS>
<CRS>EPSG:900913</CRS>
<CRS>CRS:84</CRS>
but in web interface in “Limited SRS list” is only 4326, 3035, 102067, 900913, 3875.

So does anybody knows how to cut it out?

best regards
Premysl

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Andrea_Aime4 · April 11, 2013, 3:17pm

On Thu, Apr 11, 2013 at 4:54 PM, Jonathan Moules <
jonathanmoules@anonymised.com> wrote:

I've had similar feelings in the past; ArcGIS defaults to CRS:84 if its
there, ignoring whatever you specified or the native one is.

I'm not sure if its possible, but the WMS spec says:

*To maximize interoperability among servers, providers *
*should also support geographic coordinates by geocentric coordinate
systems such as “CRS:84” (see 6.7.3.2), *
*“EPSG:4326” (see 6.7.3.3) or other ITRF-based systems. *

So depending on what "should" means, it may be hard-coded. Hopefully
someone knowledgeable about the implementation will chip in.

It's definitely hard coded, and I have the feeling it's actually mandatory
to pass the WMS compliance tests (but I haven't checked)

Cheers
Andrea

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Jukka_Rahkonen · April 11, 2013, 3:55pm

Hi,

The whole chapter is

"A WMS must support at least one CRS, and maps from multiple servers may be overlaid only if all the selected
servers have at least one CRS in common. This International Standard does not mandate support for any
particular Layer CRS(s). Instead, it only defines how CRSs are identified and discusses several optional Layer
CRSs, in this clause and in Annex B. Map providers may support the CRSs that are most useful and appropriate
to their geographic locale or information community. To maximize interoperability among servers, providers
should also support geographic coordinates by geocentric coordinate systems such as “CRS:84” (see 6.7.3.2),
“EPSG:4326” (see 6.7.3.3) or other ITRF-based systems."

Clearly not mandatory.

-Jukka Rahkonen-

________________________________
Andrea Aime wrote:

On Thu, Apr 11, 2013 at 4:54 PM, Jonathan Moules <jonathanmoules@anonymised.com<mailto:jonathanmoules@anonymised.com>> wrote:
I've had similar feelings in the past; ArcGIS defaults to CRS:84 if its there, ignoring whatever you specified or the native one is.

I'm not sure if its possible, but the WMS spec says:

To maximize interoperability among servers, providers
should also support geographic coordinates by geocentric coordinate systems such as “CRS:84” (see 6.7.3.2),
“EPSG:4326” (see 6.7.3.3) or other ITRF-based systems.

So depending on what "should" means, it may be hard-coded. Hopefully someone knowledgeable about the implementation will chip in.

It's definitely hard coded, and I have the feeling it's actually mandatory to pass the WMS compliance tests (but I haven't checked)