Barend Gehrels

Fixes issue #1250

[similarity] add similarity distance

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This is a new similarity distance, comparable to Hausdorff or Frechet. It calculates the area between two lines and divides them by the line length. This is an average distance,...

[experimental] update test-demo with version with lambdas

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Hi, this is an experimental version of partition using lambdas. For demonstration and evaluation purposes. I'm curious to your findings.

is_convex for multi only looks at the first geometry

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Commented with: ``` // TODO: this looks wrong, it should only return convex if all its rings are convex ```

hausdorff is not symmetric - that should be added to the documentation

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The Hausdorff algorithm is not symmetrical and can give unexpected results. SEE COMMENTS BELOW - we should fix the documentation. Minimal case: ``` #include namespace bg = boost::geometry; template double...

hull does not support custom geometry as result

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as detected in new unit test `custom_ring.cpp`

simplify does not support custom geometries

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As detected in new cnc_ring.cpp unit test, and others

as detected in new unit tests starting with `cnc`

As detected in the new unit test `custom_ring.cpp` For linestrings, it is supported. But for rings, (multi)polygons, multi-linestrings, it is not

Try to make threshold in get_cluster adaptive

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See issue #1081 and PR #1093