[PPGIS] New publication...

Greg Brown greg.brown at uq.edu.au
Wed May 25 23:23:36 EDT 2016

Hi all,

      Below is link that may be of interest to members of PPGIS/PGIS/VGI discussion groups.  The study is a  "meta-analysis" that examines spatial data quality across multiple PPGIS/PGIS/VGI studies. The key question is how do different sampling methods (random household, volunteer, internet panels, communities of interest) perform in terms of providing high quality data.

Global interest in participatory mapping described as public participation GIS (PPGIS), participatory GIS (PGIS), and volunteered geographic information (VGI) continues to grow, but systematic study of spatial data quality and sampling effects is limited. This paper provides a review and meta-analysis of internet-based PPGIS studies conducted 2006-2015 (n=26) to answer the following research questions: (1) How does mapping effort, as a proxy measure for spatial data quality, differ by sampling group? (2) Does the purpose and context of PPGIS influence mapping results? (3) What is the potential for mapping bias through sampling design? (4) Given the results, what should be the focus of future PPGIS research? Mapping effort was highest in sampling groups whose livelihoods were closely related to the purpose of the study, there was greater mapping effort in household sampling groups compared to volunteer groups, and participant domicile had strong effects on mapped results through spatial discounting. The use of online internet panels provides higher response rates but lower spatial data quality. Future research should focus on increasing sampling response rates, assessing social trade-offs using alternative spatial weighting schemes, and examining the capacity of the public to select land use alternatives as a complement to traditional expert-driven planning systems.

Publisher link to article here: http://onlinelibrary.wiley.com/doi/10.1111/tgis.12207/epdf
Alternate link: http://www.landscapemap2.org/publications/Brown_2016_Transactions_in_GIS.pdf

I would love to hear your views on the final paragraph.  Do you agree or disagree?

"The view that geospatial technology embedded within PPGIS systems can, by itself, leverage positive social change within the dominant, inequitable social and political structures, appears naïve. Land use planning and management decisions often involve wicked social value problems that do not have technical solutions. For PPGIS to have social impact, it must evolve from a perceived technical spatial tool into an impact analysis tool that identifies important social trade-offs in the distribution of costs and benefits associated with land use planning and management. But this evolution will require greater trust and credibility in the methods and the mapped results. Addressing the sampling and data quality issues identified in this study would be a reasonable place to start."

Greg Brown
School of Geography, Planning and Environmental Management
The University of Queensland
Email: greg.brown at uq.edu.au<mailto:greg.brown at uq.edu.au> | Ph: 07 3365 6654 | Fax: 07 3365 6899
Post: Level 4, Building 35 University of Queensland Brisbane Australia 4072

Please visit the Landscape Values and PPGIS Institute  http://www.landscapevalues.org<http://www.landscapevalues.org/>

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