[postgis-devel] Lacking of exact knn-gist?

[Alexander Korotkov]

Hi, PostGIS developers!

Currently, PostGIS supports knn-gist with <-> and <#> operators which are
distance to centroid and MBR, but not exact distance to geometrical object,
because of knn-gist limitation. However, it's not so fundamental
limitation, in principle index distance could be rechecked from heap
providing exact knn.
Do you know PostGIS users lacking of such exact knn? If so, could you give
some example where <-> and <#> operators are really insufficient?

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With best regards,
Alexander Korotkov.
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