[postgis-tickets] [PostGIS] #4711: ST_Union loses precision on complex multilinestring geometries

[PostGIS]

#4711: ST_Union loses precision on complex multilinestring geometries
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  Reporter:  dannytoone  |      Owner:  pramsey
      Type:  defect      |     Status:  new
  Priority:  medium      |  Milestone:  PostGIS 3.1.0
 Component:  postgis     |    Version:  3.0.x
Resolution:              |   Keywords:
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Comment (by dannytoone):

 Thanks pramsey and mdavis. I've crossposted this into the GEOS bug
 tracker:

 https://trac.osgeo.org/geos/ticket/1034

 Feel free to reclassify as necessary, as it is primarily to have a
 reference to the dataset.

 I wish I could take credit for the circle splitting technique, but it is
 just an implementation of the FCC's required rules for splitting p35
 license boundaries when transmitting on the same frequencies as a
 neighboring licensee in the MDS/ITFS spectrum. So in my best snarky tone
 of voice, all thanks go to the FCC!

 On the subject of snapping, how would you go about doing that? Snapping
 everything to a grid before unioning seems to work to some degree, but
 some of the geometries still end up jagged, and some still end up squared.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4711#comment:7>
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