[postgis-tickets] [PostGIS] #3973: geography implementation for ST_Intersection ST_Difference ST_Union

[PostGIS]

#3973: geography implementation for ST_Intersection ST_Difference ST_Union
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 Reporter:  dangerground  |      Owner:  pramsey
     Type:  patch         |     Status:  new
 Priority:  medium        |  Milestone:  PostGIS 2.4.3
Component:  postgis       |    Version:  2.4.x
 Keywords:                |
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 This patch adds an geography  implementation for ST_Intersection,
 ST_Difference and ST_Union with (Multi)Polygon as parameters. The
 algorithm is based on Greiner-Hormann and also supports holes within the
 polygons. I worked on this for some time, but currently lacking spare time
 for further testing and implementing support for lines in polygons. Also
 no support for the aggregate version of union is provided by this patch.

 I developed this as part of my master thesis, so I can provide additional
 information if necessary. The thesis is written in german and I don't want
 it all over the internet, so I won't provide a link, but I can share in
 private.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3973>
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