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ItemBrave new world: innovative tools for spatially enabling land administrationBENNETT, ROHAN (University of Melbourne, The Centre for SDIs and Land Administration, 2007)Introduction The term silo effect gained prominence in government and business circles during the 1990s (Williamson, 2007). It denotes the entrenched lack of communication and collaboration between organisations and their systems. For decades private organisations held onto their capital, information and skills for internal use only. All this changed with the introduction of information and communication technologies: by sharing resources with its business partners and customers a company could decrease costs, streamline processes and create better customer relations. The silo effect had to be overcome. The field of land administration was created in part in response to discussions about the silo effect. It was clear that the institutions dealing with tenure registration, cadastral mapping, natural resource management and so on, needed to be united. Integration of their theories, processes and information would result in better land management. The collaboration of ideas began in the late 1990s and has resulted in academic theories being used to enhance understandings of practical issues: for example hierarchal spatial reasoning has been applied to spatial data infrastructures (Rajabifard, 2002), policy design concepts to land policies (Ting, 2002), benchmarking to land administration systems (Steudler, 2003), cost benefit analysis to decision making about land (Paez, 2005). Organizational theory has advanced collaboration within land administration agencies (Warnest, 2005; McDougall, 2006) and tenure theories have been applied to the rural parts of developing countries (Dalrymple, 2006). Land administration is now multidisciplinary: its ability to use of the tools and theories of diverse disciplines has been its underlying strength. This chapter takes a similar approach: it looks at new theories and concepts from outside the discipline that will assist in spatially enabling land administration. Particularly, the management of the hundreds of new land rights, restrictions and responsibilities that exist over land. Ontological design, social learning, spatial technologies and uncertainty theory are four areas worthy of consideration. Each could profoundly impact upon existing land administration systems.