mapnik-org/mapnik — Issue #329: Intelligent Halo Color informed by placement background color
Author: artemp
Created: 2011-10-11 07:49:20+00:00
State: open
Labels: Symbolizers

An excellent cartographic trick is to use a halo color of the nearly same color as the background color (accumulated color of map.background + layers) where the labels are placed, but of a slightly darker or lighter hue.

The implementation of an algorithm to approach a best guess at this color when the label placement background does not vary significantly could result in some nice halos.