Re: [Geoserver-users] Spatial Statistics Analysis

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thank you very much, i'll look at them carefully and keep you posted.....

Chris Holmes <ch...@op...> wrote:
  I'm not a huge fan of the WPS spec, so I'd recommend just using a REST 
approach. It'd be a _bit_ more custom for how to handle the geo 
processing stuff, but I'd argue that the WPS spec does a lot of custom 
http stuff itself. REST gives a lot of guidelines on how to do http, 
that make it a lot less custom.

Though none are in the main geoserver distribution yet, there are a 
growing number of REST services for GeoServer, along with good support 
classes to help you.

See:

http://docs.codehaus.org/display/GEOSDOC/RESTful+Configuration+API
http://svn.codehaus.org/geoserver/branches/1.6.x/geoserver/community/RESTConfig/

and

http://docs.codehaus.org/display/GEOS/Sld+Service
http://svn.codehaus.org/geoserver/branches/1.6.x/geoserver/community/sldService/

The latter service does a bit of spatial algorithm stuff, figuring out 
quantiles, equal intervals, and unique intervals. See:

http://svn.codehaus.org/geoserver/branches/1.6.x/geoserver/community/sldService/src/main/java/org/fao/styling/RulesBuilder.java

They are filter functions in GeoTools, which may be too limited for you, 
since they depend on only processing a single featureType.

Ideally though your statistical algorithms would go in to GeoTools, so 
they can be used by uDig and GeoServer, with a REST api (and perhaps 
also WPS) in GeoServer and a nice gui in uDig. The classification stuff 
above was actually done for uDig, and some contributors are porting it 
to GeoServer as a rest service for SLD (which styles the map).

best regards,

Chris

Christos Melas wrote:
> 
> thanks a lot aaime.
> 
> I plan on implementing them based on the actual specifications of each 
> algorithm as described on referenced books. I'll inform you as soon as i 
> get some done, in order to at least contribute the algorithms. I might 
> give a shot on wps , to avoid custom http implementation for 
> distributing the processed data....if this stays in geoserver, otherwise 
> it might be useful to have in a tool like uDig or simply in geotools.....
> 
> 
> */Andrea Aime /* wrote:
> 
> Christos Melas ha scritto:
> > any comments guys?? did anyone ever have such requirement?
> > thanks,
> 
> Nope, so far GeoServer has been pure data distribution, no
> processing. The OGC interfaces for processing are defined by the
> WPS standard, and 54north has a WPS plugin that integrates with
> old versions of GeoServer (early 1.5? not sure), but then again,
> that's just protocol, afaik none of the algorithms cited
> below are available.
> 
> It would be nice to have a growing set of spatial analysis
> algorithm, but for the moment we don't even have WPS as
> a standard plugin, so we lack the infrastructure to even think
> about it.
> 
> Cheers
> Andrea
> 
> >
> >
> > Any experiences, ideas, or references would be very welcome
> > thank you
> >
> >
> > chris_m wrote:
> > >
> > > Can anyone plz tell me if there is any support for spatial
> statistics
> > > analysis in geoserver??
> > > i.e.
> > > Average Nearest Neighbor
> > > High/Low Clustering
> > > Spatial Autocorrelation
> > > Cluster and Outlier Analyses
> > > Hot Spot Analysis
> > > Central Feature
> > > Directional Distribution
> > > Linear Directional Mean
> > > Mean Center
> > > Standard Distance
> > >
> > > (as all of the above are mentioned in ArcGIS)
> > >
> > > or should i implement them from scratch??
> > >
> > > I would appreciate if anyone has a clue on the existance of such
> > > algorithms or helper api in geotools, postgis, or even udig....
> > >
> > > thanks,
> > > chris
> > >
> > >
> > >
> >
> > --
> > View this message in context:
> >
> http://www.nabble.com/Spatial-Statistics-Analysis-tp15135382p15157069.html
> > Sent from the GeoServer - User mailing list archive at Nabble.com.
> >
> >
> >
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