Thanks for the response Remi-C. Could you please give me a brief overview of what the workaround would involve? Is this a reported issue?
On Fri, May 23, 2014 at 8:08 AM, Rémi Cura <[email protected]> wrote: > Hey, > it looks like a classical precision issue. > There are some workaround but they are a little bit annoying. > > Cheers, > Rémi-C > > > 2014-05-23 13:46 GMT+02:00 Jeff Adams - NOAA Affiliate < > [email protected]>: > >> Greetings, >> >> I have been working with the st_split function and have been receiving >> strange results. Specifically, I have been using a polygon geometry to >> split a linestring geometry. After the split I have been using st_within to >> identify which of the resulting split linestring geometries are inside and >> which are outside. Sometimes the st_within results are as expected, other >> times, split linestring geometries that are clearly within the polygon >> feature (they were created using the polygon as the blade) are not >> identified as so. When checking in ArcGIS, the features that returned false >> using the st_within function in PostGIS (but by the nature of how they were >> created should be within the polygon) are being identified by ArcGIS as >> being within the polygon. Does anybody know why PostGIS' st_within is >> returning false with these features? Any workarounds? I am performing this >> analysis on a fairly large dataset. >> >> Thanks in advance... >> Jeff >> >> _______________________________________________ >> postgis-users mailing list >> [email protected] >> http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users >> > > > _______________________________________________ > postgis-users mailing list > [email protected] > http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users > -- Jeffrey D. Adams Contractor OAI, Inc. In support of: National Marine Fisheries Service Office of Protected Resources 1315 East West Hwy, Building SSMC3 Silver Spring, MD 20910 phone: (301) 427-8434 fax: (301) 713-0376
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