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<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Hello,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>I may be wrong but I don’t
see any answer to your question. Below is a request which could do the job you
need if I understood it well :<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Hugues<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>PS : as you can see
Nicolas, I learnt from your mail and I’m now able to create a “serial”
column into a request ;)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>create temp sequence
myseq increment by 1 Minvalue 1;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>with mydist as (<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>select nextval(‘myseq’)
new_id, a.id id1, b.id id2, st_distance(a.geom, b.geom) dist from my
table_of_points a, my table_of_points b<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>where a.id < b.id<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>select a.new_id n_id1,
b.new_id n_id2, id1, id2 from mydist<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>where a.new_id <
b.new_id<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>and a.dist = b.dist<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-GB
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>De :</span></font></b><font
size=2 face=Tahoma><span lang=EN-GB style='font-size:10.0pt;font-family:Tahoma'>
postgis-users-bounces@postgis.refractions.net
[mailto:postgis-users-bounces@postgis.refractions.net] <b><span
style='font-weight:bold'>De la part de</span></b> Bob Pawley<br>
<b><span style='font-weight:bold'>Envoyé :</span></b> dimanche <st1:date
Year="2012" Day="24" Month="6" ls="trans" w:st="on">24 juin 2012</st1:date>
20:16<br>
<b><span style='font-weight:bold'>À :</span></b>
postgis-users@postgis.refractions.net<br>
<b><span style='font-weight:bold'>Objet :</span></b> [postgis-users] Selecting
pairs of points that have the samedistance between them</span></font><span
lang=EN-GB><o:p></o:p></span></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 color="#00002b" face="Arial Narrow"><span
style='font-size:12.0pt;font-family:"Arial Narrow";color:#00002B'>Hi<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color="#00002b" face="Arial Narrow"><span
style='font-size:12.0pt;font-family:"Arial Narrow";color:#00002B'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color="#00002b" face="Arial Narrow"><span
style='font-size:12.0pt;font-family:"Arial Narrow";color:#00002B'>I have a
geometry of points (more than one pair) that represent the intersections between
a line and a column of multistrings. <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color="#00002b" face="Arial Narrow"><span
style='font-size:12.0pt;font-family:"Arial Narrow";color:#00002B'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color="#00002b" face="Arial Narrow"><span
style='font-size:12.0pt;font-family:"Arial Narrow";color:#00002B'>Can anyone
point me to a method of determining which pairs of points are the same distance
apart as are other pairs of points.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color="#00002b" face="Arial Narrow"><span
style='font-size:12.0pt;font-family:"Arial Narrow";color:#00002B'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color="#00002b" face="Arial Narrow"><span
style='font-size:12.0pt;font-family:"Arial Narrow";color:#00002B'>This will
isolate the closed object from the open object for me.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color="#00002b" face="Arial Narrow"><span
style='font-size:12.0pt;font-family:"Arial Narrow";color:#00002B'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color="#00002b" face="Arial Narrow"><span
style='font-size:12.0pt;font-family:"Arial Narrow";color:#00002B'>The srid is
all –1.<o:p></o:p></span></font></p>
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