[postgis-tickets] [PostGIS] #3708: within function gives wrong results

[PostGIS]

#3708: within function gives wrong results
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 Reporter:  gisdev1982  |      Owner:  pramsey
     Type:  defect      |     Status:  new
 Priority:  high        |  Milestone:  PostGIS PostgreSQL
Component:  postgis     |    Version:  1.5.X
 Keywords:              |
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 Hi Team,
 While executing the following query it gives wrong results. This was
 tested in postgis version from 1.2.1 to 1.5.5. In all the versions it
 gives wrong results.

 **Query is:**
 SELECT within(geomfromtext('POLYGON((61 34,66 34,66 31,61 31,61
 34))',101), geomfromtext('POLYGON((62 48,83 48,83 29,55 29,55 33,62
 48))',101))

 It gives me 'f' as result where as it should be 't'


 If I execute the same query by adding some precision as shown below it
 gives me correct result.

 SELECT within(geomfromtext('POLYGON((61 34,66.0000001 34,66 31,61 31,61
 34))',101), geomfromtext('POLYGON((62 48,83 48,83 29,55 29,55 33,62
 48))',101))

 kindly help me how I can get the correct result without adding the
 precision.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3708>
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