[Geotools-devel] [OSGeo-Standards] [Fwd: ImageIO MetaData]

[Rob Atkinson]

Guys, feeling your pain...

One place where ISO models (not the text specifications) can be accessed 
is via the "HollowWorld" ISO data modelling framework at

https://www.seegrid.csiro.au/twiki/bin/view/AppSchemas/HollowWorld

(requires the Enterprise Architect viewer - see links on site, or 
ability to load XMI )

I also suggest a 15 min presentation to OGC on your "Requirements and 
issues from the user's perspective" of the standards.

Rob A

Martin Desruisseaux wrote:
> Simone point out a lot of our difficulties with GridCoverage in his
> email. I share his view on most of the points he raise, especially the
> following ones (I'm really not adding anything new; Simone said all):
>
> Le vendredi 07 septembre 2007 à 20:35 +0200, Simone Giannecchini a
> écrit :
>   
>> The bad news is that, IMHO, the situation is not improved over the
>> time, well to be honest I think things are getting more intricate,
>> since new documents are coming up during the time.
>>     
>
> This is sadly true. The overlaps area between OGC specifications
> (especially the one related to GridCoverage) seems to be increasing with
> time, sometime in a coherent way, sometime not. The following list is
> not even exaustive...
>
>   - ISO 19123
>   - Grid Coverage Implementation Specification
>   - The Coverage Type
>   - Earth Imagery
>   - Imagery Metadata
>   - Image CRS for IH4DS
>   - GML 3.1.1 Grid CRS profile
>   - GML in JPEG 2000
>   - GML encoding of discrete coverage
>   - Grid Coverage Service
>   - Web Coverage Service
>   - Web Coverage Processing Service
>   - Image Exploitation Service
>   - Image Coordinate Transformation Service
>
>
>
>
>   
>> 1>A lot of documents, as I said, refer to ISO 19123 implicitly while,
>> afaik at least, GridCoverage IS is still THE adopted specification for
>> GridCoverage, afaik at least.
>>     
>
> True as far as I know...
>
>
>   
>> 2>ISO 19123 is not available for free, hence this can be a show
>> stopper for people(I know it is not expensive but still, many OGC
>> documents are referring to an ISO specification that you are supposed
>> to pay for. (Well, IMHO, this is quite strange, what does Open stand
>> for in the acronym OGC? :-) ).
>>     
>
> A few years ago, every OGC specifications were really freely available.
> But OGC was kind of competiting with ISO. They merged their work (which
> is fine), but maybe on the basis of some misunderstanding, OGC started
> to publish ISO specifications for free on their web site. ISO 19107,
> 19111 and 19115 were freely downloadable from OGC web site for instance.
> ISO complained about that. OGC tried to talk to ISO and apparently
> failed to convince them to give their specification for free. ISO 19107
> among other had to be removed from OGC free download area.
>
> So my feeling is that OGC was in good faith and really wanted to give
> the specifications for free, but did not managed to get a deal with ISO
> as they think they could. I may be completly wrong, it is just a
> feeling. But I admit that this is a problem for us...
>
>
>   
>> Well ISO19123 does NOT propose anything about I/O or processing
>> itself. There might be other ISO specs, I admit my ignorance about
>> this
>>     
>
> True, and I'm not aware of any ISO specification for coverage I/O and
> processing neither...
>
>
>   
>> 5>While ISO 19123 seems to focus only on a model for Coverage it is
>> much more complex than the old GridCoverage IS hence it is not so
>> attractive at first given also what I said above, at least IMHO :-).
>>     
>
> Very true again... I had a very hard time trying to understand ISO
> 19123, and this part is still omitted from the GeoAPI changes I wanted
> to submit to OGC because I still not sure that I understood it right. I
> do not expect a full ISO 19123 implementation in Geotools for a while...
>
> Thanks Simone for you effort in trying to provide some light in this
> Grid Coverage jungle...
>
>     Martin
>
>
>
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