[postgis-tickets] [PostGIS] #3393: ST_Area NaN on some polygons

[PostGIS]

#3393: ST_Area NaN on some polygons
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  Reporter:  rfc2616  |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 2.2.1
 Component:  postgis  |    Version:  2.2.x
Resolution:           |   Keywords:
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Comment (by pramsey):

 Any reason you're calculating on the sphere in particular? (Not that it
 matters, the old version would be sphere only anyways, probably.) The
 results even when you don't get NaN are pretty bad, even back when using
 postgis 2.0, for example:
 {{{
 select ST_Area('POLYGON((0 78.703946026662,0 0,179.999997913235
  0,179.999997913235 -33.0888306884702,0
  78.703946026662))'::geography,false);
      st_area
 -----------------
  127430010458336
 }}}
 I'd expect changes from 2.1 to 2.2, as we changed to new spherical area
 code. I'm surprised to see changes from 2.0 to 2.1, but I see that also.
 Anyways, I'm not sure the answers are right, even when you get non-NaN
 answers. Will have to confirm that.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3393#comment:1>
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