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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Use ST_Multi(point) to get what you want.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You can build your query using ST_DWithin(geomA, geomB, dist).<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";
color:#1F497D'>Gr Ralf</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p></o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Von:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
postgis-users-bounces@postgis.refractions.net
[mailto:postgis-users-bounces@postgis.refractions.net] <b>Im Auftrag von </b>Mehmet
Sirin<br>
<b>Gesendet:</b> Donnerstag, 26. November 2009 01:52<br>
<b>An:</b> PostGIS Users Discussion<br>
<b>Betreff:</b> [postgis-users] point to multipoint<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>hi, is someone out there who can explain how to make several
points to a multipoint.. i tried st_union and st_collect but what comes out is
a multilinestring and geometrycollection(string(..)) respectively.<br>
<br>
code with which the unwilling multilinestring happens:<br>
<br>
select astext(st_union(c.geom_4326)) from (<br>
select * from (select * from(<br>
select *,buffer(geom_4326,0.01)as buff from
gc_berechnet where name='Neuer Graben'
and
<br>
gemeinde='Osnabrück')a)b,
zip_coordinates zc<br>
where contains(buff,zc.geom) )c<br>
<br>
<br>
what i want to do: <br>
1.buffering a pointt (A) with a radius of 1km<br>
2.take a look which other points lie in this buffer polygon<br>
3.find out which point inside the buffer is nearest to the first point (A) i
buffered.<br>
important for 3. : when having a multipoint i can easily use st_distance to
determine the closest point to point (A)<br>
<br>
<br>
you can tell me how to create multipoint ? then i love you^^<br>
<br>
<br>
<br>
leaving you kind regards<br>
mehmet sirin c.<o:p></o:p></p>
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