[gdal-dev] [Geoserver-devel] GML lat-lon coverages and interoperability

[Peter Baumann]

Hi all,

why not simply check against the compliance tests of WCS 2 and maybe a reference
implementation? Might be the easiest for answering all such questions.

cheers,

Peter


On 04/10/2017 04:23 PM, Even Rouault wrote:
>
> On lundi 10 avril 2017 15:57:03 CEST Andrea Aime wrote:
>
> > Hi Even,
>
> > in CIS 1.1 they state:
>
> >
>
> > Coverages are assumed to have a 1:1 correlation between the axis names
>
> > given in axis-Labels and gridLabels, i.e.: they shall relate pairwise,
>
> > given by their sequence position. For example, axisLabels=“Lat Long h date”
>
> > and gridLabels={i j k l} implies a correspondence of Lat with i, Long with
>
> > j, h with k, and date with l.
>
> >
>
> > If there is no 1:1 correspondence between geographic and raster space axis,
>
> > then I see no other way but to use Function to explicitly correlate the two.
>
> > How would you propose to proceed instead?
>
>  
>
> Well, Function might be helpful then (and happily ignored by code that assumes
> that usual raster order will be used). However I'm not sure in which way GDAL
> is involved in this discussion :-) Regarding GMLJP2, GDAL will ignore Function
> on reading it, and not write it. So I think that on the read side, that should
> be OK in practice. So, there could potentially be issues on the write side for
> rasters generated by GDAL and read by other software that would assume that a
> georeferencing with Lat Long order would imply the raster first axis to be Lat
> ? Or perhaps issues in the GDAL WCS client ? Perhaps Jukka could give more
> precisions if there are actual interoperability problems.
>
>  
>
> Even
>
>  
>
> -- 
>
> Spatialys - Geospatial professional services
>
> http://www.spatialys.com
>

-- 
Dr. Peter Baumann
 - Professor of Computer Science, Jacobs University Bremen
   www.faculty.jacobs-university.de/pbaumann
   mail: p.baumann at jacobs-university.de
   tel: +49-421-200-3178, fax: +49-421-200-493178
 - Executive Director, rasdaman GmbH Bremen (HRB 26793)
   www.rasdaman.com, mail: baumann at rasdaman.com
   tel: 0800-rasdaman, fax: 0800-rasdafax, mobile: +49-173-5837882
"Si forte in alienas manus oberraverit hec peregrina epistola incertis ventis dimissa, sed Deo commendata, precamur ut ei reddatur cui soli destinata, nec preripiat quisquam non sibi parata." (mail disclaimer, AD 1083)


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/gdal-dev/attachments/20170410/c97ae4d8/attachment.html>