Hmm.. not sure there is a process that will work for you, on a stable version of GeoServer. The Aggregate process can do counts, but in order to paint a map, you need to aggregate on the geometry as well (otherwise it's not part of the aggregation output), which does not work. It was solved recently on the developer series, not sure there will be a backport to stable though (a large change was required):
https://osgeo-org.atlassian.net/browse/GEOT-7015 You can try out a nightly build of the developer series and see if that works for you: http://geoserver.org/release/main/ Cheers Andrea On Thu, Nov 18, 2021 at 10:59 AM Akshay Hegde <akshay.k.he...@gmail.com> wrote: > Hi Andrea, > > Thanks for reply. > > I was attempting below, as you can see I was attempting to count stations > at specific location ( group by latitude, longitude ), Kindly find attached > screenshot. similar to SQL > > select count(1) from sometable group by latitude, longitude. > > <Transformation> > <ogc:Function name="vec:GroupCandidateSelection"> > <ogc:Function name="parameter"> > <ogc:Literal>data</ogc:Literal> > </ogc:Function> > <ogc:Function name="parameter"> > <ogc:Literal>operationAttribute</ogc:Literal> > <ogc:Literal>stations</ogc:Literal> > </ogc:Function> > <ogc:Function name="parameter"> > <ogc:Literal>aggregation</ogc:Literal> > <ogc:Literal>COUNT</ogc:Literal> > </ogc:Function> > <ogc:Function name="parameter"> > <ogc:Literal>groupingAttributes</ogc:Literal> > <ogc:Literal>latitude</ogc:Literal> > <ogc:Literal>longitude</ogc:Literal> > </ogc:Function> > </ogc:Function> > </Transformation> > > > > > On Thu, Nov 18, 2021 at 2:46 PM Andrea Aime < > andrea.a...@geosolutionsgroup.com> wrote: > >> As per process documentation (look at the DescribeProcess output): >> >> "The aggregate operation to be computed, it can be MAX or MIN" >> >> This process selects for each group just one feature, the one that has >> either the min or the max value of a given attribute >> sum or count make no sense in that context. >> >> Cheers >> Andrea >> >> >> On Thu, Nov 18, 2021 at 6:26 AM Akshay Hegde <akshay.k.he...@gmail.com> >> wrote: >> >>> >>> I had gone through >>> >>> >>> https://docs.geoserver.org/stable/en/user/styling/sld/extensions/rendering-transform.html#contour-extraction >>> >>> Unfortunately below transformation with COUNT and SUM never works. It >>> only works with MIN and MAX function. >>> >>> Is there any resolution ? my aim is to get count, by grouping few >>> attributes and to have colored marker based on count value. >>> >>> example >>> >>> - count < 100 red color >>> - count > 100 and count < 1000 green >>> - count > 1000 >>> >>> <Transformation> >>> <ogc:Function name="vec:GroupCandidateSelection"> >>> <ogc:Function name="parameter"> >>> <ogc:Literal>data</ogc:Literal> >>> </ogc:Function> >>> <ogc:Function name="parameter"> >>> <ogc:Literal>operationAttribute</ogc:Literal> >>> <ogc:Literal>st:numericAttribute</ogc:Literal> >>> </ogc:Function> >>> <ogc:Function name="parameter"> >>> <ogc:Literal>aggregation</ogc:Literal> >>> <ogc:Literal>COUNT</ogc:Literal> >>> </ogc:Function> >>> <ogc:Function name="parameter"> >>> <ogc:Literal>groupingAttributes</ogc:Literal> >>> <ogc:Literal>st:inferredAttribute</ogc:Literal> >>> >>> <ogc:Literal>st:inferredAttribute2</ogc:Literal> >>> </ogc:Function> >>> </ogc:Function> >>> </Transformation> >>> -- >>> _______________________________________________ >>> Geoserver-users mailing list >>> >>> Please make sure you read the following two resources before posting to >>> this list: >>> - Earning your support instead of buying it, but Ian Turton: >>> http://www.ianturton.com/talks/foss4g.html#/ >>> - The GeoServer user list posting guidelines: >>> http://geoserver.org/comm/userlist-guidelines.html >>> >>> If you want to request a feature or an improvement, also see this: >>> https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer >>> >>> >>> Geoserver-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/geoserver-users >>> >> >> >> -- >> >> Regards, >> >> Andrea Aime >> >> == >> GeoServer Professional Services from the experts! >> >> Visit http://bit.ly/gs-services-us for more information. >> == >> >> Ing. Andrea Aime >> @geowolf >> Technical Lead >> >> GeoSolutions Group >> phone: +39 0584 962313 >> >> fax: +39 0584 1660272 >> >> mob: +39 333 8128928 >> >> https://www.geosolutionsgroup.com/ >> >> http://twitter.com/geosolutions_it >> >> ------------------------------------------------------- >> >> Con riferimento alla normativa sul trattamento dei dati personali (Reg. >> UE 2016/679 - Regolamento generale sulla protezione dei dati “GDPR”), si >> precisa che ogni circostanza inerente alla presente email (il suo >> contenuto, gli eventuali allegati, etc.) è un dato la cui conoscenza è >> riservata al/i solo/i destinatario/i indicati dallo scrivente. Se il >> messaggio Le è giunto per errore, è tenuta/o a cancellarlo, ogni altra >> operazione è illecita. Le sarei comunque grato se potesse darmene notizia. >> >> This email is intended only for the person or entity to which it is >> addressed and may contain information that is privileged, confidential or >> otherwise protected from disclosure. We remind that - as provided by >> European Regulation 2016/679 “GDPR” - copying, dissemination or use of this >> e-mail or the information herein by anyone other than the intended >> recipient is prohibited. If you have received this email by mistake, please >> notify us immediately by telephone or e-mail >> > > > -- > > <https://about.me/akshay.k.hegde?promo=email_sig&utm_source=product&utm_medium=email_sig&utm_campaign=edit_panel&utm_content=thumb> > Akshay Hegde > about.me/akshay.k.hegde > <https://about.me/akshay.k.hegde?promo=email_sig&utm_source=product&utm_medium=email_sig&utm_campaign=edit_panel&utm_content=thumb> > -- Regards, Andrea Aime == GeoServer Professional Services from the experts! Visit http://bit.ly/gs-services-us for more information. == Ing. Andrea Aime @geowolf Technical Lead GeoSolutions Group phone: +39 0584 962313 fax: +39 0584 1660272 mob: +39 333 8128928 https://www.geosolutionsgroup.com/ http://twitter.com/geosolutions_it ------------------------------------------------------- Con riferimento alla normativa sul trattamento dei dati personali (Reg. UE 2016/679 - Regolamento generale sulla protezione dei dati “GDPR”), si precisa che ogni circostanza inerente alla presente email (il suo contenuto, gli eventuali allegati, etc.) è un dato la cui conoscenza è riservata al/i solo/i destinatario/i indicati dallo scrivente. Se il messaggio Le è giunto per errore, è tenuta/o a cancellarlo, ogni altra operazione è illecita. Le sarei comunque grato se potesse darmene notizia. This email is intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. We remind that - as provided by European Regulation 2016/679 “GDPR” - copying, dissemination or use of this e-mail or the information herein by anyone other than the intended recipient is prohibited. If you have received this email by mistake, please notify us immediately by telephone or e-mail
_______________________________________________ Geoserver-users mailing list Please make sure you read the following two resources before posting to this list: - Earning your support instead of buying it, but Ian Turton: http://www.ianturton.com/talks/foss4g.html#/ - The GeoServer user list posting guidelines: http://geoserver.org/comm/userlist-guidelines.html If you want to request a feature or an improvement, also see this: https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
