The Role of Volunteered Geographic Information towards 3D Property Cadastral Systems
Jose-Paulo Duarte de Almeida et al.
General mapping, and particularly cadastral mapping, is a highly expensive activity and many governments are no longer willing to continue covering the even increasing costs of surveys. As far as Portugal is concerned our ultimate field of interest ongoing 2D property cadastre surveys have revealed to be rather complex, laborious and expensive given Portugalls territory tissue with a few millions of rather small real estates scattered across a rather irregular topography. Accurate collection methods of even more detailed cadastral data towards 3D cadastral systems are required. Practical acquisition of such data in the field for the purposes above constitutes the main question raised in this paper. It is believed that issues above could be tackled, at least to some extent, by considering Volunteered Geographic Information (VGI). At a time with increasing demands and when public sector resources are declining, VGI should in fact not be seen as a threat but as a potential opportunity for mapping agencies in all domains.
Event: 4th International FIG 3D Cadastre Workshop
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