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|Title:||Integrating land-cover data with different ontologies: identifying change from inconsistency|
|Authors:||Comber, Alexis J.|
Fisher, Peter F.
Wadsworth, Richard A.
|Citation:||International Journal of Geographical Information Science, 2004, 18 (7), pp.691-708|
|Abstract:||Spatially coincident land-cover information frequently varies due to technological and political variations. This is especially problematic for time-series analyses. We present an approach using expert expressions of how the semantics of different datasets relate to integrating temporal time series land-cover information where the classification classes have fundamentally changed. We use land-cover mapping in the UK (LCMGB and LCM2000) as example data sets because of the extensive object-based meta-data in the LCM2000. Inconsistencies between the two datasets can arise from random, gross and systematic error and from an actual change in land cover. Locales of possible land-cover change are inferred by comparing characterizations derived from the semantic relations and meta-data. Field visits showed errors of omission to be 21% and errors of commission to be 28%, despite the accuracy limitations of the land-cover information when compared with the field survey component of the Countryside Survey 2000.|
|Appears in Collections:||Published Articles, Dept. of Geography|
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