{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T19:31:49Z","timestamp":1770751909085,"version":"3.50.0"},"reference-count":60,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2013,6,4]],"date-time":"2013-06-04T00:00:00Z","timestamp":1370304000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJGI"],"abstract":"<jats:p>The assessment of the quality and accuracy of Volunteered Geographic Information (VGI) contributions, and by extension the ultimate utility of VGI data has fostered much debate within the geographic community. The limited research to date has been focused on VGI data of linear features and has shown that the error in the data is heterogeneously distributed. Some have argued that data produced by numerous contributors will produce a more accurate product than an individual and some research on crowd-sourced initiatives has shown that to be true, although research on VGI is more infrequent. This paper proposes a method for quantifying the completeness and accuracy of a select subset of infrastructure-associated point datasets of volunteered geographic data within a major metropolitan area using a national geospatial dataset as the reference benchmark with two datasets from volunteers used as test datasets. The results of this  study illustrate the benefits of including quality control in the collection process for volunteered data.<\/jats:p>","DOI":"10.3390\/ijgi2020507","type":"journal-article","created":{"date-parts":[[2013,6,4]],"date-time":"2013-06-04T12:24:56Z","timestamp":1370348696000},"page":"507-530","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":109,"title":["Assessing Completeness and Spatial Error of Features in Volunteered Geographic Information"],"prefix":"10.3390","volume":"2","author":[{"given":"Steven","family":"Jackson","sequence":"first","affiliation":[{"name":"Department of Geography and GeoInformation Science, George Mason University, 4400 University Drive, MS 6C3, Fairfax, VA 22030, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"William","family":"Mullen","sequence":"additional","affiliation":[{"name":"Department of Geography and GeoInformation Science, George Mason University, 4400 University Drive, MS 6C3, Fairfax, VA 22030, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peggy","family":"Agouris","sequence":"additional","affiliation":[{"name":"Department of Geography and GeoInformation Science, George Mason University, 4400 University Drive, MS 6C3, Fairfax, VA 22030, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5034-6654","authenticated-orcid":false,"given":"Andrew","family":"Crooks","sequence":"additional","affiliation":[{"name":"Department of Computational Social Science, Krasnow Institute for Advanced Study, George Mason University, 4400 University Drive, MS 6B2, Fairfax, VA 22030, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Arie","family":"Croitoru","sequence":"additional","affiliation":[{"name":"Department of Geography and GeoInformation Science, George Mason University, 4400 University Drive, MS 6C3, Fairfax, VA 22030, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8165-0667","authenticated-orcid":false,"given":"Anthony","family":"Stefanidis","sequence":"additional","affiliation":[{"name":"Department of Geography and GeoInformation Science, George Mason University, 4400 University Drive, MS 6C3, Fairfax, VA 22030, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2013,6,4]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1080\/17489720903146824","article-title":"NeoGeography: An extension of mainstream geography for everyone made by everyone?","volume":"3","author":"Rana","year":"2009","journal-title":"J. Location Based Serv."},{"key":"ref_2","first-page":"55","article-title":"The intersection of data access and public participation: Impacting GIS users\u2019 success","volume":"15","author":"Tulloch","year":"2003","journal-title":"URISA J."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Mooney, P., Corcoran, P., and Winstanley, A. (2010, January 2\u20135). Towards Quality Metrics for OpenStreetMap. Proceedings of the 18th SIGSPATIAL International Conference on Advances in Geographic Information Systems, San Jose, CA, USA.","DOI":"10.1145\/1869790.1869875"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"211","DOI":"10.1007\/s10708-007-9111-y","article-title":"Citizens as sensors: The world of volunteered geography","volume":"69","author":"Goodchild","year":"2007","journal-title":"GeoJournal"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"118","DOI":"10.1080\/17489720902950366","article-title":"NeoGeography and Web 2.0: Concepts, tools and applications","volume":"3","author":"Crooks","year":"2009","journal-title":"J. Location Based Serv."},{"key":"ref_6","first-page":"161","article-title":"The Rise of crowdsourcing","volume":"14","author":"Howe","year":"2006","journal-title":"Wired Magazine"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1177\/1354856507084420","article-title":"Crowdsourcing as a model for problem solving: An introduction and cases","volume":"14","author":"Brabham","year":"2008","journal-title":"Converg. Int. J. Res. New Media Technol."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"550","DOI":"10.1016\/j.isprsjprs.2010.06.005","article-title":"Crowdsourcing geospatial data","volume":"65","author":"Heipke","year":"2010","journal-title":"ISPRS J. Photogramm."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"319","DOI":"10.1007\/s10708-011-9438-2","article-title":"Harvesting ambient geospatial information from social media feeds","volume":"78","author":"Stefanidis","year":"2013","journal-title":"GeoJournal"},{"key":"ref_10","unstructured":"Harvey, F. (2013). Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice, Springer Science+Business Media."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"761","DOI":"10.1080\/13658810903213288","article-title":"Community-based production of geographic information using open source software and Web 2.0","volume":"24","author":"Hall","year":"2010","journal-title":"Int. J. Geogr. Inf. Sci."},{"key":"ref_12","unstructured":"Elwood, S., Goodchild, M., and Sui, D. (2013). Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice, Springer Science+Business Media."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1007\/s10708-008-9188-y","article-title":"The credibility of volunteered geographic information","volume":"72","author":"Flanagin","year":"2008","journal-title":"GeoJournal"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"146","DOI":"10.3390\/ijgi1020146","article-title":"Analyzing the contributor activity of a volunteered geographic information project\u2014The case of OpenStreetMap","volume":"1","author":"Neis","year":"2012","journal-title":"ISPRS Int. J. Geo-Inf."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"682","DOI":"10.1068\/b35097","article-title":"How good is volunteered geographical information? A comparative study of OpenStreetMap and Ordnance survey datasets","volume":"37","author":"Haklay","year":"2010","journal-title":"Environ. Plan. B Plan. Design"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"435","DOI":"10.1111\/j.1467-9671.2010.01203.x","article-title":"Quality assessment of the French OpenStreetMap dataset","volume":"14","author":"Girres","year":"2010","journal-title":"Trans. GIS"},{"key":"ref_17","unstructured":"Zielstra, D., and Zipf, A. (2010, January 10\u201314). A Comparative Study of Proprietary Geodata and Volunteered Geographic Information for Germany. Proceedings of the 13th AGILE International Conference on Geographic Information Science, Guimar\u00e3es, Portugal."},{"key":"ref_18","unstructured":"Feick, R., and Roche, S. (2013). Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice, Springer Science+Business Media."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1109\/MPRV.2008.80","article-title":"OpenStreetMap: User-generated street maps","volume":"7","author":"Haklay","year":"2008","journal-title":"IEEE Pervasive Comput."},{"key":"ref_20","unstructured":"Goodchild, M.F. (1993). Environmental Modeling with GIS, Oxford University Press."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"2011","DOI":"10.1111\/j.1749-8198.2008.00167.x","article-title":"Web mapping 2.0: The neogeography of the GeoWeb","volume":"2","author":"Haklay","year":"2008","journal-title":"Geogr. Compass"},{"key":"ref_22","unstructured":"Feick, R., and Roche, S. (October, January 30). Valuing Volunteered Geographic Information (VGI): Opportunities and Challenges Arising from a New Mode of GI Use and Production. Proceedings of the 2nd GEOValue Workshop, Hamburg, Germany."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1007\/s10708-008-9186-0","article-title":"Volunteered geographic information: Future research directions motivated by critical, participatory, and feminist GIS","volume":"72","author":"Elwood","year":"2008","journal-title":"GeoJournal"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1177\/0309132509340711","article-title":"Geographic information science: Emerging research on the societal implications of the geospatial web","volume":"34","author":"Elwood","year":"2009","journal-title":"Prog. Hum. Geogr."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"491","DOI":"10.1111\/j.1467-8306.2006.00702.x","article-title":"Public participation geographic information systems: A literature review and framework","volume":"96","author":"Sieber","year":"2006","journal-title":"Ann. Assoc. Am. Geogr."},{"key":"ref_26","unstructured":"Cooper, A., Coetzee, S., Kaczmarek, I., Kourie, D., Iwaniak, A., and Kubik, T. (June,, January 31). Challenges for Quality in Volunteered Geographical Information. Proceedings of the AfricaGEO 2011 Conference, Cape Town, South Africa."},{"key":"ref_27","unstructured":"Haklay, M. (2013). Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice, Springer Science+Business Media."},{"key":"ref_28","unstructured":"Coleman, D. (2013). Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice, Springer Science+Business Media."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"31","DOI":"10.1080\/02693799208901893","article-title":"Geographical information science","volume":"6","author":"Goodchild","year":"1992","journal-title":"Int. J. Geogr. Inf. Syst."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"299","DOI":"10.1080\/136588197242419","article-title":"A simple positional accuracy measure for linear features","volume":"11","author":"Goodchild","year":"1997","journal-title":"Int. J. Geogr. Inf. Sci."},{"key":"ref_31","first-page":"165","article-title":"The Error Component in Spatial Data","volume":"Volume 1","author":"Longley","year":"1991","journal-title":"Geographic Information Systems and Science"},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Devillers, R., and Jeansoulin, R. (2006). Fundamentals of Spatial Data Quality, ISTE.","DOI":"10.1002\/9780470612156"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"315","DOI":"10.1179\/000870410X12911304958827","article-title":"How many volunteers does it take to map an area well? The validity of linus\u2019 law to volunteered geographic information","volume":"47","author":"Haklay","year":"2010","journal-title":"Cartogr. J."},{"key":"ref_34","unstructured":"Brassel, K., Bucher, F., Stephan, E., and Vckovski, A. (1995). Elements of Spatial Data Quality, Elsevier."},{"key":"ref_35","unstructured":"Al-Bakri, M., and Fairbairn, D. (2010, January 20\u201323). Assessing the Accuracy of \u201cCrowdsourced\u201d Data and its Integration with Official Spatial Data Sets. Proceedings of the Ninth International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, Leicester, UK. Available online:http:\/\/www.spatial-accuracy.org\/system\/files\/img-X06165606_0.pdf."},{"key":"ref_36","unstructured":"Drummond, J. (1995). Elements of Spatial Data Quality, Elsevier."},{"key":"ref_37","unstructured":"Weng, Q. (2010). McGraw Hill."},{"key":"ref_38","unstructured":"Longley, P., Goodchild, M., Maguire, D., and Rhind, D. (2011). Geographic Information Systems and Science, John Wiley and Sons. [3rd ed.]."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Worboys, M., and Duckham, M. (2004). GIS A Computing Perspective, Taylor Francis. [2nd ed.].","DOI":"10.4324\/9780203481554"},{"key":"ref_40","unstructured":"Available online:http:\/\/edg.epa.gov\/metadata\/catalog\/search\/resource\/details.page?uuid=%7B794F5D6E-5347-41ED-9594-DCE122FFC419%7D."},{"key":"ref_41","unstructured":"Available online:http:\/\/wiki.openstreetmap.org\/wiki\/Points_of_interest."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"496","DOI":"10.1016\/j.compenvurbsys.2010.05.001","article-title":"Generating web-based 3D city models from OpenStreetMap: The current situation in Germany","volume":"34","author":"Over","year":"2010","journal-title":"Comp. Environ. Urban Syst."},{"key":"ref_43","unstructured":"Poore, B.S., Wolf, E.B., Korris, E.M., Walter, J.L., and Matthews, G.D. Available online:http:\/\/pubs.usgs.gov\/of\/2012\/1209."},{"key":"ref_44","unstructured":"Available online:http:\/\/navigator.er.usgs.gov\/help\/vgistructures_userguide.html."},{"key":"ref_45","unstructured":"Available online:http:\/\/nces.ed.gov\/surveys\/pss\/."},{"key":"ref_46","unstructured":"Available online:http:\/\/nces.ed.gov\/ccd\/aboutCCD.asp."},{"key":"ref_47","unstructured":"Available online:http:\/\/wiki.openstreetmap.org\/wiki\/Tag:amenity%3Dschool."},{"key":"ref_48","doi-asserted-by":"crossref","unstructured":"Wolf, E.B., Matthews, G.D., McNinch, K., and Poore, B.S. (2011). OpenStreetMap Collaborative Prototype, Phase 1, Available online:http:\/\/pubs.usgs.gov\/of\/2011\/1136\/.","DOI":"10.3133\/ofr20111136"},{"key":"ref_49","unstructured":"Ushahidi: Open Source Software for Information Collection, Visualization and Interactive Mapping. Available online:http:\/\/www.ushahidi.com\/."},{"key":"ref_50","unstructured":"Available online:http:\/\/www.census.gov\/geo\/www\/geo_defn.html#CensusTract."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"6","DOI":"10.2202\/1948-4682.1069","article-title":"Volunteered geographic information and crowdsourcing disaster relief: A case study of the Haitian earthquake","volume":"2","author":"Zook","year":"2010","journal-title":"World Med. Health Policy"},{"key":"ref_52","unstructured":"Matyas, S., Matyas, C., Mitarai, H., Komata, M., Kiefer, P., and Schlieder, C. (2009). Digital Cityscapes: Merging Digital and Urban Playspaces, Peter Lang Publishers."},{"key":"ref_53","unstructured":"Wolf, E.B., Poore, B.S., Caro, H.K., and Matthews, G.D. (2011). Volunteer Map Data Collection at the USGS, Available online:http:\/\/pubs.usgs.gov\/fs\/2011\/3103\/."},{"key":"ref_54","unstructured":"Available online:http:\/\/downloads.cloudmade.com\/americas\/northern_america\/united_states\/colorado#downloads_breadcrumbs."},{"key":"ref_55","unstructured":"Wolf, E.B. (2011). Re: Notes\/Actions from Call Today."},{"key":"ref_56","unstructured":"Available online:http:\/\/docs.python.org\/2\/library\/difflib.html."},{"key":"ref_57","unstructured":"Whaley, M. Old Adams City High School to be Renovated. Available online:http:\/\/www.denverpost.com\/news\/ci_22196962\/old-adams-city-high-school-be-renovated."},{"key":"ref_58","doi-asserted-by":"crossref","unstructured":"Walpole, R., and Myers, R. (1978). Probablity and Statistics for Engineers and Scientists, McMillan Publishing Co.. [2nd ed.].","DOI":"10.2307\/2530629"},{"key":"ref_59","unstructured":"Abramson, P. Available online:http:\/\/www.peterli.com\/spm\/pdfs\/SPM-2009-02-SUPPLEMENT.pdf."},{"key":"ref_60","unstructured":"Weihs, J. Available online:http:\/\/media.cefpi.org\/issuetraks\/issuetrak0903.pdf."}],"container-title":["ISPRS International Journal of Geo-Information"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2220-9964\/2\/2\/507\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T21:47:09Z","timestamp":1760219229000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2220-9964\/2\/2\/507"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2013,6,4]]},"references-count":60,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2013,6]]}},"alternative-id":["ijgi2020507"],"URL":"https:\/\/doi.org\/10.3390\/ijgi2020507","relation":{},"ISSN":["2220-9964"],"issn-type":[{"value":"2220-9964","type":"electronic"}],"subject":[],"published":{"date-parts":[[2013,6,4]]}}}