DC Data Engineering Meetup: Open Geodata Workshop

bit.ly/dc-data-3

  • 60 minute hands on workshop to extract raw spatial data from OSM, filter, transform and visualize it on the browser
 

OpenStreetMap www.osm.org

  • Globally crowdsourced street map of the world
  • 5+ billion points
  • Data license: ODbl (CC-by-sa like)


Change explorer: https://osmcha.mapbox.com

 

OpenStreetMap Data 📦 


  • All objects are versioned, full history: 

Formats: protobuf, XML

  • Geographic extracts
  • Filtered data may not have all the OSM objects

Formats: GeoJSON, Shapefiles

Building an upto date OSM data mirror
  1. Get latest weekly planet
  1. Apply latest day, hour, minute diffs since the last weekly dump

 

OSM data primitives

Geometry:Node


Geometry:Way


Unlike traditional GIS data both lines and areas are treated as way geometries in OSM.