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Duarte De Almeida, José-Paulo (author), Haklay, Muki (author), Ellul, Claire (author), Carvalho, Maria-Manuel (author)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...conference paper 2014