Vague spatio-thematic query processing: a qualitative approach to spatial closeness

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Grütter, R., Scharrenbach, T., & Waldvogel, B. (2010). Vague spatio-thematic query processing: a qualitative approach to spatial closeness. Transactions in GIS, 14(2), 97-109. https://doi.org/10.1111/j.1467-9671.2010.01185.x