[PostGIS] #5744: ST_RemoveIrrelevantPointsForView() - Make optimizations based on cartesian math optional

[PostGIS]

#5744: ST_RemoveIrrelevantPointsForView() - Make optimizations based on cartesian
math optional
-------------------------+---------------------------
 Reporter:  gluser1357   |      Owner:  pramsey
     Type:  enhancement  |     Status:  new
 Priority:  medium       |  Milestone:  PostGIS 3.5.0
Component:  postgis      |    Version:  master
 Keywords:               |
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 The latest optimizations of ''ST_RemoveIrrelevantPointsForView()'' (see
 changes in https://github.com/postgis/postgis/pull/767) for reducing the
 resulting point number make use of cartesian math and assume that
 coordinates won't be reprojected after applying
 ''ST_RemoveIrrelevantPointsForView()'' and before rendering.

 This is fine for common use cases where no reprojection is taking place,
 but for other use cases (where coordinates are stored e. g. as lat/lon
 values, get pre-processed with ''ST_RemoveIrrelevantPointsForView()'',
 reprojected and rendered), rendering artifacts might occur. For such use
 cases it would make sense to turn off those optimizations that use
 cartesian math. This can be achieved by using a new flag
 ''cartesian_hint''. By default (if not specified), no optimizations are
 done.

 I'll post a link to an appropriate PR here soon.
-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/5744>
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