[postgis-tickets] [PostGIS] #3712: Address MVT issues reported by specification author

[PostGIS]

#3712: Address MVT issues reported by specification author
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  Reporter:  strk     |      Owner:  Björn Harrtell
      Type:  defect   |     Status:  new
  Priority:  blocker  |  Milestone:  PostGIS 2.4.0
 Component:  postgis  |    Version:  trunk
Resolution:           |   Keywords:
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Comment (by Björn Harrtell):

 @nicklas:

 Sounds like a good subject for an essay. ;)

 @flippmoke:

 I did have a look at wagyu and while my C++ and geometry math skills are
 too limited to understand it completely it seems to be very well executed.
 I'm familiar with snap rounding but not the rest of the concepts. I can
 see how it works with small scale errors that occur because of scaling but
 I wonder how it can handle severely invalid input, for instance a large
 bow tie like POLYGON (0 0, 10 0, 10 5, 0 -5, 0 0).

 I'd also love to know more about the algorithm and perhaps help bring it
 to PostGIS. One way to do that would be to include it in GEOS. As you
 might know the upstream of GEOS is JTS and I think there would be the
 appropriate place to get it implemented first. JTS/GEOS already has snap
 rounding. I'll bring up the subject on the JTS mailing list and hopefully
 get some of their excellent geometry math brainpower involved.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3712#comment:18>
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