Martien Molenaar

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Concepts of fuzzy objects have been put forward by various authors (Burrough and Frank 1996) to represent objects with indeterminate boundaries. In most of these proposals the uncertainties in thematic aspects and the geometric aspects are treated separately. Furthermore little attention is paid to methods for object identiŽ cation, whereas it is generally(More)
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The determination of the spatial extent of geo-objects is generally approached through the boundaries or more precisely through the position of the boundary points. The analysis of the geometric uncertainty of the objects is therefore often based on accuracy models for the coordinates of these points. The accuracy evaluation in land surveying and(More)
The rapid technological developments, as well as developments in demand for information, imply the continuous need for the upgrading of professionals through “lifelong learning”. This is not only true for professionals, but also for their organizations which are in a permanent state of change. The must continuously to adjust to their changing environment,(More)
Building patterns are important features that should be preserved in the map generalization process. However, the patterns are not explicitly accessible to automated systems. This paper proposes a framework and several algorithms that automatically recognize building patterns from topographic data, with a focus on collinear and curvilinear alignments. For(More)
Abstmct The determination of the spatia) extent of geo-obiects is generally approached through their boundaries or, more precisely, thrcugh the positions of their boundary points. The analysis of the geometric uncertainty of the objects is therefore often based on accuracy models for the coordinates of these points. In many survey disciplines objects are(More)