Use of Cadastral Data in Recovery from Disaster : Quality Issues
Leiv Bjarte Mjos
Norway has since 1960 been modernizing the cadastral system. While neighboring countries and other countries in Northern Europe with German style cadastral system established nationwide cadastral maps in the 1800s and even earlier, the first attempt to conduct a cadastral survey starting in 1804-05, was stopped in Norway in 1815. In rural areas in Norway boundary descriptions was based on written descriptions up to 1980, by lay-men, and there were no large-scale maps. In cities and dense-built areas cadastral surveying mapping should develop. After the Second World War there was increased focus on issues of land planning and control, and the lack of proper maps for this became apparent. This triggered the economic survey that should be carried out throughout the 1960?s and 1970?s and well into the 80s. The economic survey should cover most of the area of the Norwegian mainland below the timberland, i.e. half of the Norwegian mainland territory. The economic mapping was based on photogrammetric methods and with no systematic adjudication process nor approval of registered property boundaries from the landowners. It is estimated that less than 50% of the boundaries were demarcated and registered in the economic mapping. In 1980, nationwide cadastral surveying was introduced, as a response to the needs for updating the new cadastral maps. The responsibility to conduct cadastral surveys were assigned the municipalities, but no surveying profession was established. Documentation of cadastral surveys is today mainly focused on producing coordinates only. The paper discusses what quality issues there are in the Norwegian cadastral system, and what limitations this leads to in respect of the cadastre being a tool for recovery from disaster. The case of a city fire in Bergen in 2008, and the subsequent reconstruction, is presented and discussed.
Event: FIG Working Week 2016 : Recovery from Disaster
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