Introduction to OSM

Introduc)on to OpenStreetMap (OSM)

Mayra Zurbarán With support from GEOlab and

PoliMappers from Politecnico di Milano

OpenStreetMap (OSM) – What is it? •  The most popular project of Volunteered Geographic InformaAon (VGI) →  Founded by Steve Coast in UK in 2004:

hNp://wiki.openstreetmap.org/wiki/History_of_OpenStreetMap

→  Free, editable vector map of the whole world built by volunteers: hNp://wiki.openstreetmap.org/wiki/About_OpenStreetMap

h9p://openstreetmap.org

OpenStreetMap (OSM) – How many users?

•  (Jan 2017) there are more than 3 million registered users: hNp://wiki.openstreetmap.org/wiki/Stats

OpenStreetMap (OSM) – License •  OpenStreetMap is an openly-‐licensed database!

→  OSM was born from the evidence that many geodata are proprietary or copyrighted, i.e. you cannot freely use them (e.g. Google Maps) hNp://wiki.openstreetmap.org/wiki/Why_OpenStreetMap%3F

→  OSM is licensed under the Open Database License (ODbL) by the OpenStreetMap FoundaAon (OSMF)

hNp://opendatacommons.org/licenses/odbl/summary

OpenStreetMap (OSM) – How to contribute

•  Everything you need to contribute to OSM is to create an account from: hNp://www.openstreetmap.org

•  EdiAng OSM? →  iD: a simple, easy-‐to-‐use online editor – suitable for beginners

hNp://wiki.openstreetmap.org/wiki/ID →  JOSM: a more powerful, offline editor – suitable for experienced users

hNps://josm.openstreetmap.de →  Vespucci: an Android editor – suitable for fast and efficient field survey

hNp://vespucci.io →  Many others! – Full list at: hNp://wiki.openstreetmap.org/wiki/Editors

OpenStreetMap (OSM) – The data model

•  OSM objects are the combinaAon of geometries and tags.

•  There are 3 geometries (hNp://wiki.openstreetmap.org/wiki/Elements) : →  NODE: a single point

→  WAY: an ordered list of nodes – Includes polylines and polygons

→  RELATION: a logic group of nodes, polylines & polygons


•  OSM objects are the combinaAon of geometries and tags.

•  Tags are the object aNributes, and are composed of a key and a value: →  Example: a building (polygon) which is used as a hotel has the tag

→  An object must have at least one tag, but can have any number of tags →  The reference set of OSM tags (a “must” for any OSM user) is available at

hNp://wiki.openstreetmap.org/wiki/Map_Features

building = hotel


•  Tags are the object aNributes, and are composed of a key and a value:


•  Tags are the object aNributes, and are composed of a key and a value -‐ RelaAons:

OpenStreetMap (OSM) – It’s simple! 10-‐year old kids can do it!

Mapathon at POLIMI with 200+ school kids

The HOT Tasking Manager •  The tool designed for managing collaboraAve humanitarian mapping in HOT and Missing Maps projects (hNp://tasks.hotosm.org): →  The areas to be mapped are subdivided into small sub-‐areas, that can

be completed rapidly – users map independently from each other and in different areas, to avoid conflicts!

Task – #2631 •  Missing Maps: Zambia Malaria EliminaAon 46

→  hNp://tasks.hotosm.org/project/2631

Help create an UNINORTE #hashtag!

•  Aper Mapping: QuanAfying the mapping done using this great tool from Pascal Neis: hNp://resultmaps.neis-‐one.org/osm-‐changesets

State of the map – Ramani Huria

Mapping for flood resilience in Tanzania: hNp://ramanihuria.org/ Atlas available at: hNps://issuu.com/ramanihuria/docs/ramani_huria_atlas_final

Gracias! – let’s map!

OSM user: mazucci TwiNer user: @mazucci

Internet

Introduction to OSM