Opened 3 days ago

Last modified 2 days ago

#5751 new defect

Problem with ST_Intersection

Reported by: ezimanyi Owned by: pramsey
Priority: medium Milestone: PostGIS 3.4.3
Component: postgis Version: 3.4.x
Keywords: Cc:

Description 

test=# select st_intersects(geometry 'Linestring(1 1,1 1)', geometry 'Linestring(1 1,3 3)');
 st_intersects
---------------
 t
(1 row)

test=# select st_astext(st_intersection(geometry 'Linestring(1 1,1 1)', geometry 'Linestring(1 1,3 3)'));
    st_astext
------------------
 LINESTRING EMPTY
(1 row)

Change History (2)

comment:1 by robe, 2 days ago

I have replicated the issue. I'm guessing the issue is because linestring 1 is a degenerate linestring. I'm honestly not sure what the answer should be to the intersection question.

comment:2 by ezimanyi, 2 days ago

The problem is in the GEOS function GEOSIntersection

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