@morganherlocker

TileReduce

Parallel Spatial Analysis

...in javascript

or more specifically, node.js

• fast computation (vs Python)
• algorithm friendly (vs SQL)
• package management (vs C/C++)
• zillions of libraries (vs everything)

a strength of node.js is that it is single threaded

...but that means cores spend time waiting around

TileReduce distributes spatial analysis across CPU cores

give TileReduce an area and it will split it into tiles

tiles,

how do they work?

z7

The Map

...no, not that kind of map

each tile is processed through a map script

this is where the work gets done

• count things
• aggregate things
• measure things
• manipulate things
• whatever you want

Data Sources

raw or geojson

remote or local

to scale:

• add more computers
• give each a low zoom tile
• tiles stack!

@mapbox + @openstreetmap

• changeset analysis
• finding bogus data
• vandalism detection
• machine learning (tiles fit models nicely)
• automated mapping (see above)
• understanding large datasets quickly

MIT

https://github.com/

mapbox/

tile-reduce

???