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Abstract

Owning land, in Switzerland and in many other countries, does not mean we can use it as we want. Landowners are subject to various laws, ordinances and regulations established by the competent authorities: the public-law restrictions on landownership. These restrictions, which are around 150 in Switzerland, come from various departments. This spread of the information leads to a loss of time, a risk of forgetting, but above all, a lack of legal safety. These aspects had initially been discussed in the publication of “Cadastre 2014” in 1998 by the FIG. As an answer to this problem, it has been decided to create the Cadastre of Public-law Restrictions on landownership (PLR Cadastre). It is an official information system which gathers the most important restrictions on landownership at one place. The process is the following: visiting an official geo-portal and getting dynamic information on whole areas with the possibility to choose which restrictions to display, or getting a static extract as a PDF file summarizing the elements concerning the plot of land considered. But what really separates the PLR Cadastre from classical geo-portals, is the fact that the information is completed by the legal provisions and legal bases which are sources to the restriction. The project started in 2012 and today, beginning of 2021, the PLR Cadastre is available on almost the whole territory of Switzerland (24 cantons out of 26). The implementation had to face several challenges. One of these is the fact that the public-law restrictions are composed of various elements, like geodata or texts, and come from different sources under the responsibility of various professional bodies. It was mandatory to be able to standardize the data, and this has been possible thanks to the framework model and the minimum data models. The project is still young and will be subject to improvement. A concrete return on investment is hard to make, nonetheless, benefits have already been witnessed. The different users of the cadastre, either professional or individual, confirmed the necessity of the PLR Cadastre and have observed time savings. The use of the tool is constantly increasing throughout the country and is now essential for all the operators who work with the landowner property.

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