Blar i NIBIO Brage på forfatter "Ullerud, Heidrun Asgeirsdatter"
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Bridging theory and implementation – Testing an abstract classification system for practical mapping by field survey and 3D aerial photographic interpretation
Ullerud, Heidrun Asgeirsdatter; Bryn, Anders; Skånes, Helle (Peer reviewed; Journal article, 2020-02-04)The abstract classification system Nature in Norway (NiN) has detailed ecological definitions of a high number of ecosystem units, but its applicability in practical vegetation mapping is unknown because it was not designed ... -
Quantification of accuracy in field-based land cover maps: A new method to separate different components
Haga, Hannah Emma Emilie Strømsrud; Nilsen, Anne-Barbi; Ullerud, Heidrun Asgeirsdatter; Bryn, Anders (Peer reviewed; Journal article, 2021-04-02)Aim Many thematic land cover maps, such as maps of vegetation types, are based on field inventories. Studies show inconsistencies among field workers in such maps, explained by inter-observer variation in classification ...