N. Budhathoki, B. Bruce, and Z. Nedovic-budic, Reconceptualizing the role of the user of spatial data infrastructure, GeoJournal, vol.3, issue.2, pp.149-160, 2008.
DOI : 10.1201/9781420038330.ch8

L. Daz, C. Granell, M. Gould, and J. Huerta, Managing user-generated information in geospatial cyberinfrastructures, Future Generation Computer Systems, vol.27, issue.3, pp.304-314, 2011.
DOI : 10.1016/j.future.2010.09.002

S. Elwood, Grassroots groups as stakeholders in spatial data infrastructures: challenges and opportunities for local data development and sharing, International Journal of Geographical Information Science, vol.39, issue.1, pp.71-90, 2008.
DOI : 10.1201/9780203485774

G. A. Giff, C. , and J. , Performance Indicators a tool to Support Spatial Data Infrastructure assessment, Computers, Environment and Urban Systems, vol.32, issue.5, pp.365-376, 2008.
DOI : 10.1016/j.compenvurbsys.2008.08.001

M. F. Goodchild, NeoGeography and the nature of geographic expertise, Journal of Location Based Services, vol.3, issue.2, pp.82-96, 2009.
DOI : 10.1111/j.1467-8306.1989.tb00257.x

C. Gouveia, A. Fonseca, A. Cmara, and F. Ferreira, Promoting the use of environmental data collected by concerned citizens through information and communication technologies, Journal of Environmental Management, vol.71, issue.2, pp.135-154, 2004.
DOI : 10.1016/j.jenvman.2004.01.009

L. Grus, W. Castelein, J. Crompvoets, T. Overduin, B. Van-loenen et al., An assessment view to evaluate whether Spatial Data Infrastructures meet their goals, Computers, Environment and Urban Systems, vol.35, issue.3, 2010.
DOI : 10.1016/j.compenvurbsys.2010.09.004

M. Haklay, A comparative study of openstreetmap and ordnance survey datasets for london and the rest of england, Environment and Planning B: Planning and Design, vol.37, issue.4, pp.628-703, 2010.

S. Ho and A. Rajabifard, Learning from the crowd: The role of volunteered geographic information in realising a spatially enabled society, Proceedings of GSDI 12 World Conference -Realising Spatially Enabled Societies, 2010.

M. Kalantari, H. Olfat, and A. Rajabifard, Automatic spatial metadata enrichment: Reducing metadata creation burden through spatial folksonomies, GSDI 12 Proceedings of the 12th Global Spatial Data Infrastructures Conference GSDI, pp.773-779, 2010.

C. Kebler, K. Janowicz, and M. Bishr, An agenda for the next generation gazetteer: geographic information contribution and retrieval, Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems GIS '09, ACM, pp.91-100, 2009.

B. D. Longueville, Community-based geoportals: The next generation? concepts and methods for the geospatial web 2.0. Computers, Environment and Urban Systems, pp.299-308, 2010.

B. D. Longueville, N. Ostländer, and C. Keskitalo, Addressing vagueness in volunteered geographic information (VGI) ? A case study, International Journal of Spatial Data Infrastructures Research, vol.5, 2009.

P. Mooney and P. Corcoran, A study of data representation of natural features in openstreetmap, Proceedings GIScience 2010: The Sixth International Conference on Geographic Information Science, 2010.

P. Mooney, P. Corcoran, and A. C. Winstanley, Towards quality metrics for OpenStreetMap, Proceedings of the 18th SIGSPATIAL International Conference on Advances in Geographic Information Systems, GIS '10, pp.514-517, 2010.
DOI : 10.1145/1869790.1869875

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=

E. E. Omran and J. Van-etten, Spatial???Data Sharing: Applying Social???Network Analysis to study individual and collective behaviour, International Journal of Geographical Information Science, vol.15, issue.6, pp.699-714, 2007.
DOI : 10.1068/b32113

M. Over, A. Schilling, S. Neubauer, and A. Zipf, Generating web-based 3D City Models from OpenStreetMap: The current situation in Germany, GeoVisualization and the Digital City -Special issue of the International Cartographic Association Commission on GeoVisualization, pp.496-507, 2010.
DOI : 10.1016/j.compenvurbsys.2010.05.001

E. Pultar, M. Raubal, T. J. Cova, and M. F. Goodchild, Dynamic GIS Case Studies: Wildfire Evacuation and Volunteered Geographic Information, Transactions in GIS, vol.37, pp.85-104, 2009.
DOI : 10.1201/9781420060355

C. Thellufsen, A. Rajabifard, S. Enemark, and I. Williamson, Awareness as a foundation for developing effective spatial data infrastructures, Land Use Policy, vol.26, issue.2, pp.254-261, 2009.
DOI : 10.1016/j.landusepol.2008.03.002

S. Wiemann and L. Bernard, A comparative study of proprietary geodata and volunteered geographic information for germany, Proceedings AGILE 2010: The 13th AGILE International Conference on Geographic Information Science, 2010.