1. Kartotherian & Wikipedia Maps
Yuri Astrakhan

2. What is Kartotherian? Open source vector/raster tile server
Designed for high volume sites
Supports logstash, grafana
Flexible processing pipeline
Based on Mapnik 3 & Mapbox components
Distributed vector tile generation (Tilerator)

3. Tilerator GL Style tm2 Style for PNG tm2source SQL PBF OSM Tables
WebGL
PNG
Varnish Caching
tm2
Style
for PNG
Kartotherian
Invalidated Tiles
List
Redis Que
tm2source
SQL
Tilerator
OSM DB
PostgreSQL
OSM
Tables
Tile Storage
Cassandra or
SQL or Files
PBF
vector
tile

4. Source Pipeline Components
getTile(z,x,y)
putTile(z,x,y, tile)
Batch PUT
Batch GET
(iterate)
Source
new(uri)
bridge – generates tiles (e.g. from SQL)
vector – renders vector tiles into raster tiles
cassandra/postgres/file/... – tile storage
overzoom – extracts portion of low zoom tile
autogen – get from src2 if not in src1 and save
layermixer/demultiplexer – tile manipulation

5. Kartography is Hard Decide what is needed?
Generate vector tiles (SQL!)
Fast to generate
Include only what is needed
Optimize geometries
Clipping issues, road merging issues, ...
Draw the tiles (style)

6. Wikipedia Maps Info Overlays:
<map lat=… lon=…>{geojson data}</map>
Historical
Old raster map overlays, timeline sliders
Mobile App – articles as POIs
Discover – fun to read more

7. Questions? Yuri Astrakhan yuri@wikimedia.org @nyuriks
github.com/nyurik