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Earth observation for citizen science validation, or citizen science for earth observation validation? The role of quality assurance of volunteered observations

Leibovici, Didier G.; Williams, Jamie; Rosser, Julian F.; Hodges, Crona; Chapman, Colin; Higgins, Chris; Jackson, Mike J.

Authors

Didier G. Leibovici

Jamie Williams

Julian F. Rosser

Crona Hodges

Colin Chapman

Chris Higgins

Mike J. Jackson mike.jackson@nottingham.ac.uk



Abstract

Environmental policy involving citizen science (CS) is of growing interest. In support of this open data stream of information, validation or quality assessment of the CS geo-located data to their appropriate usage for evidence-based policy making needs a flexible and easily adaptable data curation process ensuring transparency. Addressing these needs, this paper describes an approach for automatic quality assurance as proposed by the Citizen OBservatory WEB (COBWEB) FP7 project. This approach is based upon a workflow composition that combines different quality controls, each belonging to seven categories or “pillars”. Each pillar focuses on a specific dimension in the types of reasoning algorithms for CS data qualification. These pillars attribute values to a range of quality elements belonging to three complementary quality models. Additional data from various sources, such as Earth Observation (EO) data, are often included as part of the inputs of quality controls within the pillars. However, qualified CS data can also contribute to the validation of EO data. Therefore, the question of validation can be considered as “two sides of the same coin”. Based on an invasive species CS study, concerning Fallopia japonica (Japanese knotweed), the paper discusses the flexibility and usefulness of qualifying CS data, either when using an EO data product for the validation within the quality assurance process, or validating an EO data product that describes the risk of occurrence of the plant. Both validation paths are found to be improved by quality assurance of the CS data. Addressing the reliability of CS open data, issues and limitations of the role of quality assurance for validation, due to the quality of secondary data used within the automatic workflow, are described, e.g., error propagation, paving the route to improvements in the approach.

Citation

Leibovici, D. G., Williams, J., Rosser, J. F., Hodges, C., Chapman, C., Higgins, C., & Jackson, M. J. (2017). Earth observation for citizen science validation, or citizen science for earth observation validation? The role of quality assurance of volunteered observations. Data, 2(4), https://doi.org/10.3390/data2040035

Journal Article Type Article
Acceptance Date Oct 19, 2017
Publication Date Oct 23, 2017
Deposit Date Feb 8, 2018
Publicly Available Date Feb 8, 2018
Journal Data
Electronic ISSN 2306-5729
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 2
Issue 4
DOI https://doi.org/10.3390/data2040035
Keywords citizen science; volunteered geographical information; metadata; data quality; quality assurance; scientific workflow; provenance; metaquality; open data
Public URL http://eprints.nottingham.ac.uk/id/eprint/49665
Publisher URL http://www.mdpi.com/2306-5729/2/4/35
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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