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  1. MariaDB Server
  2. MDEV-34141

Implement the GIS function ST_Simplify

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      The GIS function ST_Simplify takes ad input a geometry (g) and a double (max_distance). It applies the Ramer–Douglas–Peucker algorithm on g and returns the resulting geometry.

      The goal of the Douglas-Peucker algorithm is to find a geometry that is similar to g but uses only a subset of points. To perform the simplification, all the vertexes that are shorter than max_distance are removed.

      The algorithm may produce self-intersections and therefore result in invalid geometries.

      If the max_distance is not positive or is NULL, an ER_WRONG_ARGUMENT will occur.

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              Gosselin Dave Gosselin
              Stefano Petrilli Stefano Petrilli
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