Infrastructure Engineering - Research Publications

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    Cadastral reform: an Australian vision for the 1990s
    Williamson, Ian P. (Dienst van het Kadaster en de Openbare Registers, 1991)
    Ten years ago cadastral reform was not an issue in Australia. In fact, the term 'cadastre' was not even thought applicable in Common Law jurisdictions; today this view has changed. What is 'cadastral reform' and why has it become a key issue in Australasia over the last few years, are key elements of this paper.This chapter recognises that present Australian cadastral systems had their genesis in the 19th Century and, as a consequence, many of our practices, laws and regulations and institutional arrangements are not applicable in today's society. In reforming our cadastral systems, the paper looks at the major pressures which are instigating change. In particular, the chapter emphasises that an holistic approach is necessary in reforming cadastral systems while recognising that cadastral systems are fast becoming spatial information systems, in parallel with the community as it moves into the era of an information society.As an example of the growing interest in cadastral reform, the recent conference 'Cadastral Reform 1990', the first of its type in Australia, is reviewed.
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    Computational structure in three-valued nearness relations
    DUCKHAM, MATT ; WORBOYS, MICHAEL (Springer, 2001)
    The development of cognitively plausible models of humanspatial reasoning may ultimately result in computational systems thatare better equipped to meet human needs. This paper explores how humansubjects perceive the qualitative spatial relation nearness within anenvironmental space. Based on experimental data, a three-valued nearnessrelation is analysed in two stages. First, the results are analysedwith special reference to the existence of subsets of candidate landmarkplaces, from which nearness relations between other places may be partiallyinferred. Second, the desirable properties of such landmark setsare considered and some of their formal properties are presented. Theseproperties are then considered in the light of the data furnished by theexperiment. The paper concludes with a discussion of the signicance ofthe analyses and the scope for further work in this area.