On Fri, Aug 17, 2012 at 8:55 AM, Rahkonen Jukka
<[email protected]>wrote:
> > Andrea Aime wrote:
>
>
> > GeoServer WMS GetFeatureInfo returns the value of the various bands in
> the pixel you
> > clicked. You can ask the GML output to get better parseability.
> > Of course that works only if you previously made a WMS GetMap.
>
> Why so? GetFeatureInfo does not need to know anything about GetMap. The
> request needs to contain almost all of the GetMap parameters and WMS
> clients usually copy them from GetMaps. However, I believe it could be
> possible to do a very simple application which takes only the query point
> as attribute and builds then the rest of the request automatically
>
> REQUEST=GetFeatureInfo&
> SERVICE=WMS&VERSION=1.1.1&
> WIDTH=3&
> HEIGHT=3&
> FORMAT=image/png&
> LAYERS=elevation&
> QUERY_LAYERS=elevation&
> INFO_FORMAT=application/vnd.ogc.gml&
> SRS=EPSG:3067&
> X=1&
> Y=1&
> BBOX=10000,20000,10010,20010
>
> All the other parameters could be always the same except BBOX. It could
> take the upper left corner coordinates from user input (10000,20010) and
> calculate the the other two BBOX values by using some small offsets. By
> using WMS 1.1.1 there is be no need to think even about axis order.
>
Hum, yep, that would work, provided you don't have scale dependencies in
your
SLD, if you do there is a need to account for those too when sizing up the
relationship between width/height and the bbox
Cheers
Andrea
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Ing. Andrea Aime
@geowolf
Technical Lead
GeoSolutions S.A.S.
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