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Last active August 29, 2015 14:17
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In which I wish there were newer tilemill releases
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email.md

My apologies - I didn't anticipate this problem! The short answer is that you need to install tilemill from source for this to work.

The long answer is as follows. The polgyon-geometry-transform feature was available in mapnik in version 2.1.0 onwards, released in August 2012 [1]. The latest tilemill release is v0.10.1, released in October 2012 [2].

mapnik-reference is the project within tilemill which tells tilemill what features are available in mapnik. Information about polygon-geometry-transform was only added in March 2013 [3], in version 5.0.5. Tilemill 0.10.1 depends on "mapnik-reference 5.0.x" but shipped with version 5.0.0 . So reinstalling from source will make it use the latest 5.0.x mapnik-reference (5.0.9), and that contains the information about polygon-geometry-transform.

I use tilemill 0.10.1 myself, but I installed it from source at some point after March 2013, which is why I didn't realise there would be a problem!

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