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st_ delaunay returning empty geometry from 3D points

Discussion in 'Programming/Internet' started by Gary Nobles, Oct 8, 2018.

  1. Gary Nobles

    Gary Nobles Guest

    The Data

    I have a 3D point dataset, one row looks like this

    SELECT ST_AsEWKT (geom) FROM pc_processing.top_dist
    SRID=32635;POINT(580992.318 4275265.0982 191.284)
    ... +1000 more


    The problem

    I want to triangulate in 3D so I try the

    SELECT ST_AsEWKT (ST_DelaunayTriangles(geom,0,0))


    But if I select the following I get

    SELECT ST_AsEWKT (ST_DelaunayTriangles(geom,0,0))
    FROM pc_processing.top_dist
    SRID=32635;GEOMETRYCOLLECTION EMPTY
    ....


    So, how do I return a Delaunay triangulation from 3D point data?

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