[postgis-tickets] [PostGIS] #5311: ST_Contour bug over the limits of tiles

[PostGIS]

#5311: ST_Contour bug over the limits of tiles
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  Reporter:  latot   |      Owner:  robe
      Type:  defect  |     Status:  new
  Priority:  medium  |  Milestone:  PostGIS 3.3.3
 Component:  raster  |    Version:  3.3.x
Resolution:          |   Keywords:
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Comment (by pramsey):

 I would think in general any attempt to generate contours on independent
 raster and then match them up will be bound to fail. Most handling of
 things that pass over boundaries in tile problems involves divying up the
 raw inputs so they have generous overlap between each tile, then apply the
 algorithm, then clip the outputs to the actual tile bounds. That would at
 least MINIMIZE the errors one might expect from the algorithm, though I
 bet there would still be some smaller inconsistencies, maybe as a result
 of the algorithm differing based on where it chooses to seed the process.
 This is not something that is/will be changed/fixed in PostGIS.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5311#comment:3>
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