Reducing the world with JavaScript

on YouTube ↗29m

" summary

Claims a working open source module TileReduce (about 405 lines of JavaScript) that runs on Node.js and parallelises MapReduce over vector tiles. Demonstrations include filtering roundabouts and counting buildings from OpenStreetMap, running worldwide tile sets (sources: osm-tiles) and finishing big runs on EC2 in minutes; supports GeoJSON/OSM/shapefiles/CSV inputs, bounding-box or tile-cover constraints, and real results used for osm-analytics, osm-lint and simple feature extractions.

AI-written summary · about

" chapters (5)

1. 0:00Start
2. 9:37Vector Tiles are Fast
3. 11:18MapReduce
4. 13:44Data chunks - Vector Tiles
5. 20:15Problem: Count the number of buildings in OpenStreetMap

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