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<DIV><SPAN class=761113812-20082009><FONT face=Arial color=#0000ff>Impossible I
think,</FONT></SPAN></DIV>
<DIV><SPAN class=761113812-20082009><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=761113812-20082009><FONT face=Arial color=#0000ff>the result
can be a point or a line.</FONT></SPAN></DIV>
<DIV><SPAN class=761113812-20082009><FONT face=Arial color=#0000ff>You can
import your polygon into grass gis, convert vector to raster and use r.thin to
see what an algorithm can do.</FONT></SPAN></DIV>
<DIV><SPAN class=761113812-20082009><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=761113812-20082009><FONT face=Arial color=#0000ff>Gr
Ralf</FONT></SPAN></DIV>
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<DIV></DIV>
<DIV class=OutlookMessageHeader lang=de dir=ltr align=left><FONT
face=Tahoma>-----Ursprüngliche Nachricht-----<BR><B>Von:</B>
postgis-users-bounces@postgis.refractions.net
[mailto:postgis-users-bounces@postgis.refractions.net] <B>Im Auftrag von
</B>eehab hamzeh<BR><B>Gesendet:</B> Donnerstag, 20. August 2009
13:54<BR><B>An:</B> postgis-users@postgis.refractions.net<BR><B>Betreff:</B>
[postgis-users] Center line<BR><BR></FONT></DIV>Hello, <BR><BR>I am looking
for algorithm or functions implemented in postgis to find the center line of a
a closed polygon, for example river, street,etc.<BR><BR>Kind
regards<BR><BR>Ihab <BR><BR><IMG alt=""><IMG alt=""><IMG alt=""><BR><BR><BR>
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