<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">No such thing right now. If someone is interested in the problem, there is some background here:<DIV><BR class="khtml-block-placeholder"></DIV><DIV><<A href="http://en.wikipedia.org/wiki/Minimum_spanning_tree">http://en.wikipedia.org/wiki/Minimum_spanning_tree</A>></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>P</DIV><DIV><BR><DIV><DIV>On 6-Nov-06, at 3:09 PM, Catherine Morency wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"> <DIV class="Section1"><P class="MsoNormal"><FONT size="2" face="Arial"><SPAN style="font-size:10.0pt; font-family:Arial">Hello,<O:P></O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Arial"><SPAN style="font-size:10.0pt; font-family:Arial"><O:P> </O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Arial"><SPAN style="font-size:10.0pt; font-family:Arial">I am a new user of Postgis. <O:P></O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Arial"><SPAN style="font-size:10.0pt; font-family:Arial">I am looking for a function to compile the length of the shortest string connecting a set of points. <O:P></O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Arial"><SPAN style="font-size:10.0pt; font-family:Arial">There are no network, only spatial points. I have already compiled the convex hull of these sets of points and I am looking for another indicator.<O:P></O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Arial"><SPAN style="font-size:10.0pt; font-family:Arial"><O:P> </O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Arial"><SPAN style="font-size:10.0pt; font-family:Arial">Thank you.<O:P></O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Arial"><SPAN style="font-size:10.0pt; font-family:Arial"><O:P> </O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" color="silver" face="Arial"><SPAN style="font-size: 10.0pt;font-family:Arial;color:silver">====================================</SPAN></FONT><O:P></O:P></P><P class="MsoNormal"><EM><B><I><FONT size="2" color="navy" face="Arial"><SPAN style="font-size:10.0pt;font-family:Arial;color:navy;font-weight:bold">Catherine Morency, ing., Ph.D.</SPAN></FONT></I></B></EM><O:P></O:P></P><P class="MsoNormal"><STRONG><B><FONT size="2" face="Arial Narrow"><SPAN style="font-size:10.0pt;font-family:" arial="" narrow""="">Professeure adjointe</SPAN></FONT></B></STRONG><O:P></O:P></P><P class="MsoNormal"><STRONG><B><FONT size="2" face="Arial Narrow"><SPAN style="font-size:10.0pt;font-family:" arial="" narrow""="">Département des génies civil, géologique et des mines</SPAN></FONT></B></STRONG><O:P></O:P></P><P class="MsoNormal"><STRONG><B><FONT size="2" face="Arial Narrow"><SPAN style="font-size:10.0pt;font-family:" arial="" narrow""="">École Polytechnique de Montréal</SPAN></FONT></B></STRONG><O:P></O:P></P><P class="MsoNormal"><STRONG><B><FONT size="2" face="Arial Narrow"><SPAN style="font-size:10.0pt;font-family:" arial="" narrow""="">Groupe MADITUC</SPAN></FONT></B></STRONG><O:P></O:P></P><P class="MsoNormal"><STRONG><B><FONT size="2" face="Arial Narrow"><SPAN style="font-size:10.0pt;font-family:" arial="" narrow""="">(514) 340-4711 p.4502</SPAN></FONT></B></STRONG><O:P></O:P></P><P class="MsoNormal"><FONT size="2" face="Arial"><SPAN style="font-size:10.0pt; font-family:Arial"><A href="mailto:cmorency@polymtl.ca"><FONT size="3" face="Times New Roman"><SPAN style="font-size:12.0pt;font-family:" times="" new="" roman""="">cmorency@polymtl.ca</SPAN></FONT></A></SPAN></FONT><O:P></O:P></P><P class="MsoNormal"><FONT size="2" color="silver" face="Arial"><SPAN style="font-size: 10.0pt;font-family:Arial;color:silver">====================================</SPAN></FONT><O:P></O:P></P><P class="MsoNormal"><FONT size="3" face="Times New Roman"><SPAN style="font-size: 12.0pt"><O:P> </O:P></SPAN></FONT></P> </DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">postgis-users mailing list</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><A href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</A></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><A href="http://postgis.refractions.net/mailman/listinfo/postgis-users">http://postgis.refractions.net/mailman/listinfo/postgis-users</A></DIV> </BLOCKQUOTE></DIV><BR></DIV></BODY></HTML>