Using PPGIS and crowdsourcing for mapping social values for ecosystem services: The case study of Datuan basin
Date Issued
2014
Date
2014
Author(s)
Lee, Hsin-Yi
Abstract
An ecosystem provides tangible and intangible benefits to humans; however, as human activities constantly cause enormous and rapid change of environment, it is essential to include information resulting from both social and biophysical assessments when we evaluate ecosystem services. Social values, representing the link between humans and the environment, are integrated into the ecosystem and quantified by a placed-based method which refers to the valuation methodology of ecosystem services in current studies. Social values for ecosystem services model (SolVES) is developed in response to the need for incorporating quantified and spatially explicit measures of social values into ecosystem services assessments.
The study took Da-Tun brook as a case study. Using the data collected via the ways of public participation geographic information system (PPGIS) and crowdsourcing, the SolVES model was applied to calculate social value index in the area of Da-Tun brook. The results of the study describe the spatial distribution of social values in the study area and the comparisons of results among respondent groups from different socioeconomic backgrounds. Also, the study used kappa efficient to demonstrate the differences between PPGIS and crowdsourcing results.
Key findings indicate that: (1) social values assemble near Da-Tun river due to the reason that the places marked by respondents are also near Da-Tun river. Moreover, this result shows that social values in Da-Tun brook are highly relative to the distance to the river, (2) people from different socioeconomic backgrounds reveal different social values results, also, different respondent groups show different preferences towards social values, (3) with a thorough introduction of study area and social values, PPGIS social values results are similar to those from crowdsourcing; however, historic results show larger difference between PPGIS and crowd sourcing results due to the fact that long living experience is necessary for mapping historic value in an area.
Key words: social values, ecosystem services, PPGIS, crowd sourcing, citizen science, Social Values for ecosystem services (SolVES), Volunteered Geographic Information (VGI)
Subjects
社會價值
生態系統服務
公共參與地理資訊系統
群眾資源
公民科學
生態系統服務之社會價值模式(SolVES)
自願性地理資訊
Type
thesis
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