Re: [OSGeo-Discuss] CoverageJSON

Tue, 30 Aug 2016 02:30:08 -0700

Dear Jachym,

 

We define the MIME type as “application/prs.coverage+json”. See [1] for more information about this and about our concept of “profiles”.

 

Currently CovJSON is being discussed in the context of the joint OGC/W3C “Spatial Data on the Web” working group, although there is no formal standards process in place at the moment. In the longer term I’d like to make this a community standard, although I’m not sure whether to do this under OGC, W3C, OSGeo or something else! I’m not very experienced in such things, so any suggestions or guidance would be welcome.

 

Best wishes,
Jon

 

 

[1] https://github.com/covjson/specification/blob/master/spec.md#10-media-type-and-file-extension

 

From: Jachym Cepicky <jachym.cepi...@gmail.com>
Date: Tuesday, 30 August 2016 10:15
To: Jon Blower <sgs02...@reading.ac.uk>, OSGeo Discussions <discuss@lists.osgeo.org>
Cc: Massimiliano Cannata <massimiliano.cann...@supsi.ch>, Bruce Bannerman <bruce.bannerman.os...@gmail.com>
Subject: Re: [OSGeo-Discuss] CoverageJSON

 

Hi,

 

just humble suggestion: you can make this to OSGeo Community standard, like TMS [1] was at it's time and get more publicity and possible more collaborators to the project. Promote and colaborate via standards mailing list [2]

 

btw: what is the mimetype, we shall stick to? (OGC WebProcessingService and others need one single clear mimeType)

 

Cheers

 

J

 

 

út 30. 8. 2016 v 11:09 odesílatel Jon Blower <j.d.blo...@reading.ac.uk> napsal:

Dear all,

 

(Second attempt at sending this, I wasn’t subscribed before!)

 

I’m the leader of the project under which CoverageJSON is being developed [1]. My colleague Maik Riechert is the main developer of this. Thanks very much to Bruce for advertising to this list! I’ll pick up on a few of the points in this thread:

 

1.       Regarding adoption, it’s early days yet, but I’m aware of a few applications in development (including our own projects of course, but also some external folk). We’re building in library support for a few languages (e.g. _javascript_, Python) and some tools (e.g. Leaflet and NASA’s Web World Wind).

2.       I think CovJSON can work nicely with O&M (the coverage can be the result of the observation). O&M could provide the “hooks” on which other metadata (e.g. provenance) could be hung.

3.       Regarding compression: yes, this is going to be important. JSON gzips very well on the wire, which helps a lot with transfer speed and our tests indicate that it’s typically not very much worse than a compressed binary format. We’ve worked successfully with rasters of millions of pixels in size.

4.       We’d be very happy to help people who want to implement support for CovJSON in software (e.g. istSOS). Maybe our libraries will be of some use here.

 

Any feedback on the spec or tools (positive or negative) is very welcome and timely, as we are moving towards a stable 1.0 release.

 

Best wishes,
Jon

 

[1] http://www.melodiesproject.eu

 

-- 

Dr Jon Blower,

MELODIES project coordinator,

University of Reading

 

From: Massimiliano Cannata <massimiliano.cann...@supsi.ch>
Date: Thursday, 18 August 2016 09:47
To: Bruce Bannerman <bruce.bannerman.os...@gmail.com>
Cc: Jachym Cepicky <jachym.cepi...@gmail.com>, OSGeo Discussions <discuss@lists.osgeo.org>, Jon Blower <sgs02...@reading.ac.uk>
Subject: Re: [OSGeo-Discuss] CoverageJSON

 

Dear All,

the coverage in O&M is addressed also at EU level within the SOS but in XML.

 

I may be interested in exploring this format and add this capability to istSOS in the next future...

 

Maxi

 

2016-08-17 22:58 GMT+02:00 Bruce Bannerman <bruce.bannerman.os...@gmail.com>:

Thanks Jachym.

 

I can also see the potential of this format.

 

I like the potential for tying in the Observations and Measurements Observed Property with associated community agreed definitions to the coverage. This has been a missing piece of the puzzle for some time.

 

I understand that Jon and his team would welcome collaboration to further test and develop the format.

 

I expect that Jon will respond when he gets back off his holiday.

 

Bruce


On 17 Aug 2016, at 19:03, Jachym Cepicky <jachym.cepi...@gmail.com> wrote:

Hi Bruce and Jon,

 

I went through the spec, and I like it in general (not that it would be so important) 

 

JSON usage is certainly still growing, so is size of the data. Are you guys using the CoverageJSON in some application already? I like the metadata verbosity, and overall readiness for international environment.

 

Have you been thinking about data compression too? For raster data, this could be key issue IMHO.

 

good luck

 

Jachym

 

čt 11. 8. 2016 v 0:47 odesílatel Bruce Bannerman <bruce.bannerman.os...@gmail.com> napsal:

Hi,

Are any projects doing any work with the emerging data format, CoverageJSON?

See:

- https://covjson.org/

- https://github.com/covjson/specification/blob/master/spec.md


I understand that this is still a work in progress, but is in a fairly stable state at the moment.

If anyone has looked at the format in detail, what are your thoughts on its viability for:

- data exchange; and

- to underpin spatial and image analysis?

Bruce

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--

Massimiliano Cannata

Professore SUPSI in ingegneria Geomatica

Responsabile settore Geomatica

 

Istituto scienze della Terra

Dipartimento ambiente costruzione e design

Scuola universitaria professionale della Svizzera italiana

Campus Trevano, CH - 6952 Canobbio

Tel. +41 (0)58 666 62 14

Fax +41 (0)58 666 62 09

massimiliano.cann...@supsi.ch

www.supsi.ch/ist

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