tecznotes

Michal Migurski's notebook, listening post, and soapbox. Subscribe to this blog. Check out the rest of my site as well.

Dec 31, 2011 2:19am

solar stylesheet

A little more Mapnik work for the week: Aaron Huslage and Roger Weeks of Tethr asked about a map stylesheet for OSM data that could generate maximally-compressed tiles to fit onto a portable GIS / disaster response system they’re prototyping.

OSM Solar is a response to that requirement, and generates tiles that in many cases are 30%-40% the size of their OSM Mapnik counterparts. The job is mostly accomplished through drastic color reduction to a 4-bit (16 color) palette and aggressive pruning of details: parks are named but not filled, buildings are just barely visible for minimal context, color transitions and road casings are avoided.

The colors are sampled from Ethan Schoonover’s Solarized, “Precision colors for machines and people.” They’re designed for editing text, but work well for maps too. I’ve plucked out a narrow range, made the freeways bright magenta, and otherwise left everything alone.

The stylesheets can be found on Github, and I’ve tried to minimize external dependencies to the absolute minimum PostGIS, Mapnik, and osm2pgsql setup imaginable. If you use this to render tiles, you’ll want to use TileStache because it understands what to do with the included 16-color palette file.

Comments (1)

  1. This is gorgeous and has inspired me to change my vim color scheme.

    Posted by Ben Golder on Sunday, January 8 2012 3:33pm EST

Sorry, no new comments on old posts.

February 2016
Su M Tu W Th F Sa
 
     

Recent Entries

  1. blog all oft-played tracks VII
  2. week 1,984: back to the map
  3. bike eleven: trek roadie
  4. code like you don’t have the time
  5. projecting elevation data
  6. the bike rack burrito n’ beer box
  7. a historical map for moving bodies, moving culture
  8. the other openstreetmap churches post
  9. platforminess, smartness, and meaningfulness
  10. writing a new continuous integration service for openaddresses
  11. state of the map 2015
  12. bike ten: schwinn touring, v2
  13. blog all oft-played tracks VI
  14. 2015 fellowship reader
  15. bike ten: schwinn touring
  16. more open address machine
  17. open address machine
  18. making the right job for the tool
  19. the hard part
  20. end the age of gotham-everywhere

Archives