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<p class=MsoNormal>Hi,<o:p></o:p></p>
<p class=MsoNormal>I have a table with 27000 records and each record has 2
geometry columns. The first column has an original MULTIPOLYGON (named original_poly),
and the second column has some tweaks (buffer and simplification) applied to
the original data, and is also stored as a MULTIPOLYGON (named new_poly).<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I want to get the list of these rows where the new_poly does
NOT contain the original_poly. The first time I ran it, I got this: “ERROR:
GEOS contains() threw an error!”<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>So, then I thought that maybe some of the polygons were not
valid. There were 6 invalid polygons, so then I tried running this query:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>select count(*) <o:p></o:p></p>
<p class=MsoNormal>from temp_places_buffer <o:p></o:p></p>
<p class=MsoNormal>where(st_isvalid(new_poly) = true and
st_isvalid(redfin_poly) = true) <o:p></o:p></p>
<p class=MsoNormal>and not st_contains(t1.new_poly, t1.redfin_poly);<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Unfortunately, I still get this error:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>ERROR: GEOS contains() threw an error!<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>What are possible reasons that this would still be throwing
an error, other than invalid polygons, since the query should now only be
calculating st_contains on valid polygons?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am running this version:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>
postgis_version<o:p></o:p></p>
<p class=MsoNormal>---------------------------------------<o:p></o:p></p>
<p class=MsoNormal> 1.3 USE_GEOS=1 USE_PROJ=1 USE_STATS=1<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>-James<o:p></o:p></p>
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