Hi, hum, maybe what you want with st_buffer is a WPS? this service let you do dynamic stuff with your data. But integrate this with openlayers... i don't do that... yet :D.
if your data are in postgis, you could put a WFS or WMS, with many tables. You can create a temp table, or a view from a select (passing the variables via a form) and them you put that view at mapserver (add an entry in geometry_columns for that view). If you don't want to edit your data (change the vectors) you could make many WMS and put a view(created from a buffer) in a another WMS, so when the user want to do a buffer stuff, he do that only at that table or some features from that table. Making a dynamic buffer can turn in a performance nightmare... i think. Maybe you could cache some buffer to gain speed. just some ideas. []'s 2008/8/27 Gustavo Ces <[EMAIL PROTECTED]> > Hi Luigi, > > but with WFS i´ll have to create the table for each query and serve > that table, won´t i? I don´t know very well WFS, but if a i want to make a > buffer table with ST_buffer ( for example) i have to create a table and then > serve it as WFS ( automatically, coding it in my application). If a i need > to change the distance in St_Buffer funcion, then i have to recreate that > table and serve it as WFS... or maybe there is a something in WFS > specification to make these types of querys? ( not queries over the result > table!) > What i want to do is postgis analysis capacity viewed in open layers. Maybe > there is a better solution... > Thanks for answering, > > Gus > > ----- Original Message ----- > *From:* Luigi Castro Cardeles <[EMAIL PROTECTED]> > *To:* PostGIS Users Discussion <[email protected]> > *Sent:* Tuesday, August 26, 2008 5:17 PM > *Subject:* Re: [postgis-users] Postgis and open layers > > Hi, > > try to create wms and wfs. They are supported by openlayers. > []'s > > 2008/8/26 Gustavo Ces <[EMAIL PROTECTED]> > >> Hi all, >> >> i was searching info about viewing postgis data in openlayers. Which >> would be the better approach to draw dynamic queries in postgis? Views not >> valid to me because needed queries with variables. >> One solution could be making with dynamic web language the query to >> create an asGML/KML/... file and then render it in open layers... Any other >> idea? >> Thanks in advance, >> >> Gus >> >> _______________________________________________ >> postgis-users mailing list >> [email protected] >> http://postgis.refractions.net/mailman/listinfo/postgis-users >> >> > > > -- > Luigi Castro Cardeles > > ------------------------------ > > _______________________________________________ > postgis-users mailing list > [email protected] > http://postgis.refractions.net/mailman/listinfo/postgis-users > > > _______________________________________________ > postgis-users mailing list > [email protected] > http://postgis.refractions.net/mailman/listinfo/postgis-users > > -- Luigi Castro Cardeles
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