OpenStreetMap. For the semi-uninitiated. Fraser Kirkpatrick Technical Project Manager 27 th September CGI Group Inc.

Transcription

1 OpenStreetMap For the semi-uninitiated Fraser Kirkpatrick Technical Project Manager 27 th September

2 Agenda Introduction to OpenStreetMap Summary of OSM data model Live Edit Data Maturity Consuming OSM data Tools for Improving OSM data Validating OSM data OpenStreetMap in Scotland Summary Questions 2

3 Introduction to OpenStreetMap Project started in 2004 Wikipedia of Maps anyone can edit information Focus on building a global database of geospatial data All data published in an open format under a CC BY-SA license Why? Traditional commercial mapping datasets are expensive to purchase, and often specific to individual countries Any data captured on top of commercial datasets can be subject to derived data copyright law OSM contributions therefore need to be based on knowledge or surveys and cannot copy other maps Devices for capturing location-based information are ubiquitous lower barrier to entry Active contributors growing steadily passed 1M March a window into underlying database 3

4 Summary of OSM Data Model Topological data model Nodes (points) Ways (lines) Closed Ways (areas) Relations (groups of Nodes / Ways) Each item is tagged with list of key value pairs Tagging conventions well documented in OSM Wiki: Number of ways to edit data, mostly commonly: ID browser based JOSM desktop application 4

5 Live Edit 5

6 Data Maturity

7 Data Maturity

8 Data Maturity

9 Consuming OSM data Traditionally consuming the data has been complex: Need to build tile server to host data Building customised maps possible, but complex to achieve Now a number of hosting services for OSM data promoting easy integration and customisation of data. Companies like Mapbox serve a large number of customers themselves Data moving from Raster-based static map tiles to Vector-based rendering Routing APIs: FOSS tools e.g. GraphHopper Mapbox CycleStreets: 9

10 Mapbox Demo 10

11 Tools for Improving OSM data Lots of big players contributing tools to improve data (Mapbox, Microsoft, Apple, Facebook spoke at the OSM State of the Map annual conference) Strava (Mapbox customer) reciprocating with heat map of anonymised data: 11

12 Validating OSM data Wikipedia optimistic editing model emphasis is on allowing people to easily edit data and encourage new contributors Number of tools for generating RSS feeds of areas locally mappers tend to monitor activity Mapbox tool OSMCha which flags edits based on criteria: Suspect names / tags New user Significant object altered Large number of data deleted 12

13 Validating OSM data 13

14 OpenStreetMap in Scotland Lots of active contributors, pub meetups, mapping parties Detailed data for main cities in Scotland Good track record on major construction projects e.g. Queensferry Crossing Some high profile contributions Edinburgh University Mapping Edinburgh s Social History (MESH) Always more to do, rural areas tend to have good street coverage but less in terms of buildings / addresses. New contributors welcome Other Scottish resources: Page on OSM Wiki Mailing list Twitter github page for posting issues 14

15 Summary Exciting time for OpenStreetMap Data is becoming mature in a global way Number of high profile users of the data Big players investing in tools to more easily consume / improve / validate the data 15

16 Questions 16