Influence of human uncertainty in the elaboration of fuzzy reference databases for the accuracy assessment of land cover maps

Pedro Sarmento, Cidália C. Fonte, Joel Dinis, Mário Caetano

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Reference databases for the accuracy assessment of land cover maps are assumed to represent the true land cover in a set of selected locations. Although, the elaboration of reference databases through field visits or photo interpretation of aerial images is a hard and difficult task due to uncertainty in the assignment of the most correct land cover class at each sample location because of landscape fragmentation. To capture the diversity of land cover in each pixel of the reference data, a linguistic scale composed by five linguistic values is used in this paper and a methodology to translate the linguistic values to fuzzy intervals is proposed, based on the responses of the photo interpreters to a set of chosen pixels. These fuzzy intervals are then used to build a fuzzy confusion matrix and fuzzy thematic accuracy measures are derived. The main goal of this study is to quantify the differences of perception of photo-interpreters when assigning a linguistic scale to the sample pixels of the reference database. The proposed approach is tested on a case study where the accuracy assessment of a map of Continental Portugal with five land cover classes, derived from MERIS images, is made.

Original languageEnglish
Title of host publicationAccuracy 2012
Subtitle of host publicationProceedings of the 10th International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences
PublisherInternational Spatial Accuracy Research Association (ISARA)
Pages79-84
Number of pages6
Publication statusPublished - 1 Jan 2012
Event10th International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, Accuracy 2012 - Florianopolis, Brazil
Duration: 10 Jul 201213 Jul 2012

Conference

Conference10th International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, Accuracy 2012
CountryBrazil
CityFlorianopolis
Period10/07/1213/07/12

Keywords

  • Fuzzy confusion matrix
  • Fuzzy intervals
  • Linguistic scale
  • Photo-interpretation
  • Reference database uncertainty

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    Sarmento, P., Fonte, C. C., Dinis, J., & Caetano, M. (2012). Influence of human uncertainty in the elaboration of fuzzy reference databases for the accuracy assessment of land cover maps. In Accuracy 2012: Proceedings of the 10th International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences (pp. 79-84). International Spatial Accuracy Research Association (ISARA).