<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>Simon,</DIV>
<DIV> </DIV>
<DIV>Yes, I have solved the problem by merging left linestrings and also the right linestring aswell.</DIV>
<DIV> </DIV>
<DIV>kind regards,</DIV>
<DIV> </DIV>
<DIV>surya<BR></DIV>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman, new york, times, serif"><BR>
<DIV style="FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, sans-serif"><FONT face=Tahoma size=2>
<HR SIZE=1>
<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Simon Greener <simon@spatialdbadvisor.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> PostGIS Users Discussion <postgis-users@postgis.refractions.net><BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Thu, October 15, 2009 4:46:40 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [postgis-users] polygon minimum width<BR></FONT><BR>Sury,<BR><BR>Sorry for the delay: you must have solved this by now.<BR><BR>My "test case" only had two linestrings as you didn't give us any real data to play with. Looking at your 5 row data result below seems to indicate that your river covers more than two rows. So, question to you, what is stored in each row? Which rows have the left data and which the right?<BR><BR>And if there are null geometries then you should do this:<BR><BR>select row_number() over (order by the_geom) as rin, the_geom<BR> from River r<BR> where
r.Name = 'Barito'<BR> and r.the_geom is not null;<BR><BR>regards<BR>Simon<BR>On Wed, 14 Oct 2009 20:43:45 +1100, Surya Tarigan <<A href="mailto:surya.tarigan@yahoo.com" ymailto="mailto:surya.tarigan@yahoo.com">surya.tarigan@yahoo.com</A>> wrote:<BR><BR>> Dear Simon,<BR>><BR>> the previous SQL ((select row_number() over (order by the_geom) as rin) gave good result, meanwhile the second SQL ( (select ctid as rin, the_geom) still return '0' min_width. But I still need to check my river polyline, because both min and max give exactly the same result, which it should not..<BR>><BR>> After I run :<BR>><BR>> select row_number() over (order by the_geom) as rin, the_geom<BR>> from River r<BR>> where r.Name = 'Barito';<BR>> it gave result something like :<BR>> rin, the_geom<BR>> 1; -----(empty)---<BR>> 2;-----(empty)---<BR>> 3;010500000000........<BR>>
4;010500000000.............<BR>> 5;010500000.........<BR>> could it be caused by empty the_geom in rin 1 and 2?<BR>> kind regards,<BR>> sury<BR>><BR>><BR>><BR>><BR><BR><BR>-- <BR>SpatialDB Advice and Design, Solutions Architecture and Programming,<BR>Oracle Database 10g Administrator Certified Associate; Oracle Database 10g SQL Certified Professional<BR>Oracle Spatial, SQL Server, PostGIS, MySQL, ArcSDE, Manifold GIS, FME, Radius Topology and Studio Specialist.<BR>39 Cliff View Drive, Allens Rivulet, 7150, Tasmania, Australia.<BR>Website: <A href="http://www.spatialdbadvisor.com/" target=_blank>www.spatialdbadvisor.com</A><BR> Email: <A href="mailto:simon@spatialdbadvisor.com" ymailto="mailto:simon@spatialdbadvisor.com">simon@spatialdbadvisor.com</A><BR> Voice: +61 362 396397<BR>Mobile: +61 418 396391<BR>Skype: sggreener<BR>Longitude: 147.20515 (147° 12' 18" E)<BR>Latitude: -43.01530 (43° 00' 55"
S)<BR>GeoHash: r22em9r98wg<BR>NAC:W80CK 7SWP3<BR>_______________________________________________<BR>postgis-users mailing list<BR><A href="mailto:postgis-users@postgis.refractions.net" ymailto="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</A><BR>http://postgis.refractions.net/mailman/listinfo/postgis-users<BR></DIV></DIV></div><br>
</body></html>