<div dir="ltr">Hi,<br><br>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.<br><br>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). <br>
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. <br>
<br>Making a dynamic buffer can turn in a performance nightmare... i think. <br><br>Maybe you could cache some buffer to gain speed. just some ideas.<br><br>[]'s<br><br><div class="gmail_quote">2008/8/27 Gustavo Ces <span dir="ltr"><<a href="mailto:g.ces@pettra.es">g.ces@pettra.es</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff">
<div><font face="Arial" size="2">Hi Luigi,</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2"> but
with WFS iŽll have to create the table for each query
and serve that table, wonŽt i? I donŽt 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!)</font></div>
<div><font face="Arial" size="2">What i want to do is postgis analysis capacity
viewed in open layers. Maybe there is a better solution...</font></div>
<div><font face="Arial" size="2">Thanks for answering,</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Gus</font></div>
<blockquote style="border-left: 2px solid rgb(0, 0, 0); padding-right: 0px; padding-left: 5px; margin-left: 5px; margin-right: 0px;"><div><div></div><div class="Wj3C7c">
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">----- Original Message ----- </div>
<div style="background: rgb(228, 228, 228) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
<b>From:</b>
<a title="luigi.cardeles@gmail.com" href="mailto:luigi.cardeles@gmail.com" target="_blank">Luigi
Castro Cardeles</a> </div>
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>To:</b> <a title="postgis-users@postgis.refractions.net" href="mailto:postgis-users@postgis.refractions.net" target="_blank">PostGIS Users
Discussion</a> </div>
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>Sent:</b> Tuesday, August 26, 2008 5:17
PM</div>
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>Subject:</b> Re: [postgis-users] Postgis and
open layers</div>
<div><br></div>
<div dir="ltr">Hi,<br><br>try to create wms and wfs. They are supported by
openlayers.<br>[]'s<br><br>
<div class="gmail_quote">2008/8/26 Gustavo Ces <span dir="ltr"><<a href="mailto:g.ces@pettra.es" target="_blank">g.ces@pettra.es</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff">
<div><font face="Arial" size="2">Hi all,</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2"> 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. </font></div>
<div><font face="Arial" size="2"> 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?</font></div>
<div><font face="Arial" size="2"> Thanks in
advance,</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Gus</font></div></div><br>_______________________________________________<br>postgis-users
mailing list<br><a href="mailto:postgis-users@postgis.refractions.net" target="_blank">postgis-users@postgis.refractions.net</a><br><a href="http://postgis.refractions.net/mailman/listinfo/postgis-users" target="_blank">http://postgis.refractions.net/mailman/listinfo/postgis-users</a><br>
<br></blockquote></div><br><br clear="all"><br>-- <br>Luigi Castro Cardeles<br></div>
</div></div><p>
</p><hr><div class="Ih2E3d">
<p></p>_______________________________________________<br>postgis-users
mailing
list<br><a href="mailto:postgis-users@postgis.refractions.net" target="_blank">postgis-users@postgis.refractions.net</a><br><a href="http://postgis.refractions.net/mailman/listinfo/postgis-users" target="_blank">http://postgis.refractions.net/mailman/listinfo/postgis-users</a><br>
</div></blockquote></div>
<br>_______________________________________________<br>
postgis-users mailing list<br>
<a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
<a href="http://postgis.refractions.net/mailman/listinfo/postgis-users" target="_blank">http://postgis.refractions.net/mailman/listinfo/postgis-users</a><br>
<br></blockquote></div><br><br clear="all"><br>-- <br>Luigi Castro Cardeles<br>
</div>