Mapnik 4.0.3 Release Oct 30, 2024 | Artem Pavlenko
Mapnik 4.0.2 Release Aug 21, 2024 | Artem Pavlenko
Mapnik 4.0.1 Release Jul 30, 2024 | Artem Pavlenko
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Mapnik 3.1.0 Release Jan 08, 2021 | Artem Pavlenko
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Mapnik 3.0.23 Release Jan 18, 2020 | Artem Pavlenko
Mapnik 3.0.22 Release Jan 22, 2019 | Artem Pavlenko
Mapnik 3.0.21 Release Oct 08, 2018 | Artem Pavlenko
Mapnik 3.0.20 Release Apr 12, 2018 | Artem Pavlenko
Mapnik 3.0.19 Release Mar 06, 2018 | Artem Pavlenko
Mapnik 3.0.18 Release Jan 26, 2018 | Artem Pavlenko

latest news

Introducing a Color Blind Filter

Aug 14, 2015

I was prompted by reading this conversation recently about color blind maps. I realized suddenly that we don’t support a way for our cartographers to easily design maps that would be easy to view by a color blind individual. Determined to change this, I quickly dashed off to my development batcave!

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After some quick research I found a research paper on colour blindness. After quickly deducing that color should be spelled with out a u, I proceeded to throw together an algorithm. (Artem thinks it spelled with a u)

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I emerged from the bat cave with some new code in Mapnik. Image filters for three types of color blindness.

  • Protanopia (1% of males) – filter: color-blind-protanope
  • Deuteranopia (1% of males) – filter: color-blind-deuteranope
  • Tritanopia (less than 1% of males and females) – filter: color-blind-tritanope

So here are some maps with the color blind filters!

Original Wheat Paste

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Protanopia Wheat Paste

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Deuteranopia Wheat Paste

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Tritanopia Wheat Paste

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If all those maps look the same to you, you might be color blind.















Okay I lied, here are the real ones.

Original Wheat Paste

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Protanopia Wheat Paste

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Deuteranopia Wheat Paste

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Tritanopia Wheat Paste

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These image filters are now released in mapnik 3.0.3 and node mapnik 3.4.3!

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