mapnik/mapnik — pull request #2510 by talaj (2014-10-08 11:17:35+00:00)
Title: add visual test - simplify line

Test for line simplification.

Things I noticed:
* None of the simplification algorithms preserves topology.
* It seems all the three algorithms have the same output.
* Sine on reference images with `scale_factor` 2.0 is missing due to https://github.com/mapnik/mapnik/issues/2476.