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Abstract
(GE)OBIA (Geographic Object-Based Image Analysis) utilises intelligent tools and algorithms for automatically delineating and labelling geographical objects. OBIA aims at converting traditional and established photo-interpretation tasks into operational use. Moreover, it may help to support the realisation of novel tasks in addressing composite classes, modelling new geographical realities, or observing changes at the individual object level, etc. Ranging from object representations (real-world objects or bona fide objects), via complex composite classes (real-world modelled objects) to concept-related fiat objects, OBIA poses new challenges for evaluating object validity in an operational context. This paper reflects on the need for an object-based validation concept, illustrates policy-related application scenarios and discusses qualitative and quantitative pillars under thematic and geo-spatial aspects.
Acknowledgements
This work has been carried out within the frame of the EC-funded projects MOVE (Methods for the Improvement of Vulnerability Assessment in Europe, FP-7, Contract No. 211590) and BRAHMATWINN (Twinning European and South Asian River basins to enhance capacity and implement adaptive integrated water resources management approaches, FP-6, Contract No. GOCE-036952), as well the contractual research project BIMS (Biotope information and management system), funded by the Verband Region Stuttgart. The authors wish to thank the editors of this special feature for their encouragement and effort, and the reviewers for their constructive and detailed feedback.