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Where are the US Mappers at? Contributor & Data Development
in U.S. Urbanized Areas
Dennis Zielstra and Pascal NeisState of the Map US 2014 – Washington D.C.
April 12 & 13, 2014
Background
Data Preparation
Retrieve OSM full history dump file
Clip and process data
Combine data with socioeconomic
information
Selected Urban Areas
Development/ContributionsNodes/Area in km2
Current Situation
Nodes/Area in km2
Development/ContributionsWays/Area in km2
Current SituationWays/Area in km2
Development/ContributionsRelations/Area in km2
Socio Economic FactorsPearson’s R Spearman's R
Contributors and Contributions 0.24 (weak) 0.48 (strong)
Contributors and Population Density 0.46 (strong) 0.45 (strong)Contributors and
Per Capita Income (PCI) 0.64 (strong) 0.43 (strong)Contributors and
Education (BA or higher) 0.42 (strong) 0.31 (moderate)
Community DevelopmentContributors per urban area
Community Distribution• How to determine home region of a mapper?
1. First or latest created Node of contributor2. Delaunay triangulation of all Nodes created by contributor3. Delaunay triangulation of all contributor changeset
centroids4. Spatial statistics e.g. K-means clustering method
http://en.wikipedia.org/wiki/K-means_clusteringhttp://en.wikipedia.org/wiki/Delaunay_triangulation
Community DistributionCurious? Try: hdyc.neis-one.org
US OSM Community Development & Distribution
Issue of External Contributions
Some areas depend heavily on external contributions!
External Contributions in the US
Strong contributors (>= 1000 Nodes)
External Contributions in the US
Medium to low contributors (< 1000 Nodes)
Thanks!Twitter:@den_uf@pascal_n
Email:[email protected]@neis-one.org
Weekly OSM Summary at:https://blog.openstreetmap.org
References• Mooney, P.; Corcoran, P. Characteristics of Heavily Edited Objects in
OpenStreetMap. Future Internet 2012, 4, 285-305.
• Neis, P.; Zielstra, D.; Zipf, A. The Street Network Evolution of Crowdsourced Maps: OpenStreetMap in Germany 2007–2011. Future Internet 2012, 4, 1-21.
• Neis, P.; Zielstra, D.; Zipf, A. Comparison of Volunteered Geographic Information Data Contributions and Community Development for Selected World Regions. Future Internet 2013, 5, 282-300.
• Neis, P.; Zielstra, D. Recent Developments and Future Trends in Volunteered Geographic Information Research: The Case of OpenStreetMap. Future Internet 2014, 6, 76-106.