Mapnik 4.0.2 Release Aug 21, 2024 | Artem Pavlenko
Mapnik 4.0.1 Release Jul 30, 2024 | Artem Pavlenko
Mapnik 4.0.0 Release Jun 16, 2024 | Artem Pavlenko
Mapnik 3.1.0 Release Jan 08, 2021 | Artem Pavlenko
Mapnik 3.0.24 Release Jan 05, 2021 | Artem Pavlenko
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
Blake Thompson
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!
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)
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
Protanopia Wheat Paste
Deuteranopia Wheat Paste
Tritanopia Wheat Paste
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
Protanopia Wheat Paste
Deuteranopia Wheat Paste
Tritanopia Wheat Paste
These image filters are now released in mapnik 3.0.3 and node mapnik 3.4.3!