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:dzielstra@ufl.edupascal@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.