artemp/mapnik — Issue #539: Broken tiles when using hextree
Author: artemp
Created: 2011-10-11 16:24:37+00:00
State: open
Labels: Core_Library

I've noticed a strange edge case when passing these options to render:

{{{png256:c=128:m=h}}}

When the image contains just a few transparent pixels at the edge of a tile tiles are rendered completely transparent.

Passing {{{png256:c=128:m=o}}} produces correct output as shown in the attached image.

Alberto