[postgis-tickets] [PostGIS] #3685: Topolgy error after ST_AsGeoJSON

[PostGIS]

#3685: Topolgy error after ST_AsGeoJSON
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  Reporter:  JJTl     |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS PostgreSQL
 Component:  postgis  |    Version:  2.3.x
Resolution:           |   Keywords:  ST_AsGeoJSON, topology error
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Comment (by dbaston):

 Making a round-trip transformation between binary floating point numbers
 and text is a recipe for trouble, unfortunately.  ST_AsGeoJSON produces
 output with a maximum of 15 digits, which is not enough to use it as a
 lossless serialization format.  Maybe the docs should note this, or use
 more digits like pg_dump?

 If you run this geometry through ST_MinimumClearance, you'll see that it
 returns an exceedingly low value of 2.2e-14.  That means that, you have a
 vertex somewhere that, if moved by 2e-14, will cause the geometry to be
 invalid.  In other words, not a very robust geometry.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3685#comment:1>
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