OpenStreetMap: An Introduction

Learn the basics of OpenStreetMap and what you can do with the data.

Transcript

1. OPENSTREETMAP MICHAEL FOGLEMAN 2016-03-02 speakerdeck.com/fogleman
2. OpenStreetMap (OSM) is a collaborative project to create a free editable map of the world.
4. Not the prettiest maps. But lots of cool data is in there. And it’s all freely available!
5. OPENSTREETMAP STEP 1: ACQUIRE THE DATA ▸ Straight from the source ▸ openstreetmap.org > Export ▸ Bulk downloads ▸ download.geofabrik.de ▸ Through an API ▸ http://wiki.openstreetmap.org/wiki/Overpass_API/ Language_Guide 2016-03-02
7. OPENSTREETMAP STEP 2: UNDERSTAND THE FILE FORMATS ▸ .osm - XML format ▸ .osm.pbf - Binary protocol buffer format (much smaller on disk) ▸ Some tools / parsers only work with one format ▸ Convert between formats: ▸ osmosis --read-xml input.osm --write-pbf output.osm.pbf ▸ Filter the file contents: ▸ osmfilter --keep="highway=" input.osm > output.osm 2016-03-02
8. OPENSTREETMAP STEP 3: FIND AN OSM PARSER IN YOUR FAVORITE LANGUAGE ▸ Python ▸ http://imposm.org/docs/imposm.parser/latest/ ▸ Go ▸ https://github.com/qedus/osmpbf ▸ Javascript ▸ https://github.com/marook/osm-read ▸ https://www.npmjs.com/package/osmparser ▸ Lots of others… 2016-03-02
9. OPENSTREETMAP STEP 4: UNDERSTAND THE DATA STRUCTURES! ▸ Node (Point) ▸ ID, Latitude, Longitude, Tags ▸ Way (Polyline) ▸ ID, Node IDs, Tags ▸ Relation (Group) ▸ ID, Member IDs, Tags 2016-03-02
10. OPENSTREETMAP TAGS: HIGHWAY= ▸ motorway ▸ trunk ▸ primary ▸ secondary ▸ tertiary ▸ unclassified ▸ residential ▸ service 2016-03-02
11. OPENSTREETMAP SOME INTERESTING TAGS ▸ oneway=yes ▸ building=yes ▸ height=10 (meters by default) ▸ highway= traffic_signals ▸ name=Park Avenue ▸ maxspeed=50 (km/h by default) 2016-03-02
17. QUESTIONS?