Re: Geographic metadata in Spatial Data on the Web Best Practices

Hi Martin - I've incorporated your suggestions and modified the references
that were pointing to epsg.io to point to epsg-registry.org.

I see that this supersedes your previous email [1] which made more or less
the same suggestions. Oh- and we don't point to the Apache SIS project
staging area anymore either.

Can you confirm that you're content with the changes I've made - latest
version is the editor's draft [2]? See Pull Request #791 [3] for details.

Jeremy

[1]:
https://lists.w3.org/Archives/Public/public-sdw-comments/2016Nov/0000.html
[2]: http://w3c.github.io/sdw/bp/
[3]: https://github.com/w3c/sdw/pull/791

On Tue, 4 Apr 2017 at 21:46 Ed Parsons <eparsons@google.com> wrote:

> Thanks Martin, I have fwd'd to the editors.
>
> Ed
>
>
> On Tue, 4 Apr 2017 at 17:04 Martin Desruisseaux <
> martin.desruisseaux@geomatys.com> wrote:
>
>> Hello Ed
>>
>> For EPSG codes, the best practice documents links to http://epsg.io in
>> many places. Would it be possible to replace http://epsg.io links by
>> http://epsg-registry.org links? The later is the only official source of
>> EPSG definitions, and those two sources differ in axis order and other
>> aspects. There is unfortunately a lot of confusion about axis order and (to
>> lesser extend) units of measurement of CRS defined by EPSG codes, so I
>> worry that having W3C referencing a site publishing non-compliant EPSG
>> definitions may contribute to the confusion. For example the document has
>> some sentences accurately describing WGS 84 as (Lat/Long), but the link to
>> http://epsg.io/4326 describes a (Long/Lat) system (except in their GML
>> definitions).
>>
>> The proposed replacements are:
>>
>>    - http://epsg.io/28992 ->
>>    http://epsg-registry.org/?display=entity&urn=urn:ogc:def:crs:EPSG::28992
>>    - http://epsg.io/27700 ->
>>    http://epsg-registry.org/?display=entity&urn=urn:ogc:def:crs:EPSG::27700
>>    - *etc.* for all EPSG codes (a search in the HTML source code shows
>>    22 occurrences).
>>
>> I suggest to also replace the following sentence in chapter 8:
>>
>> Definitions of coordinate reference systems are available from the Open
>> Geospatial Consortium CRS Register, Spatial Reference and EPSG.io (an
>> open-source web service which simplifies discovery of coordinate reference
>> systems utilized worldwide).
>>
>> By
>>
>> Definitions of coordinate reference systems are available from the Open
>> Geospatial Consortium CRS Register <http://www.opengis.net/def/crs/> and EPSG
>> registry <http://epsg-registry.org/> (the official source of EPSG
>> definitions). Other web services like Spatial Reference
>> <http://spatialreference.org/> and EPSG.io <http://epsg.io> also provide
>> definitions as used in popular software, but those definitions — especially
>> the ones published in Well Known Text (WKT) version 1 format — sometime
>> differ from official EPSG definitions in axis order and units of
>> measurement.
>>
>> Regards,
>>
>>     Martin
>>
>>
>> Le 04/04/2017 à 15:16, Ed Parsons a écrit :
>>
>> Hello Neil,
>>
>> I am working my way through the  public comments made to the Spatial Data
>> on the Web working group prior to the release of final draft of the Best
>> Practice Document, current version here https://www.w3.org/TR/sdw-bp/
>>
>> Hopefully you will notice a section that deals specifically with
>> approaches to making metadata about spatial data including ISO 19115
>> compliant metadata more accessible - there is more work to do in this
>> section before the final draft, but you very valid point about the value of
>> existing metadata records has been taken onboard.
>>
>> https://www.w3.org/TR/sdw-bp/#bp-metadata
>>
>> Would you allow me to therefore  mark this comment as closed ?
>>
>> Many thanks for your contribution.
>>
>>
>> --
>
>
> *Ed Parsons *FRGS
> Geospatial Technologist, Google
>
> +44 7825 382263 <+44%207825%20382263> @edparsons
> www.edparsons.com
>