The Survey of Israel is the government agency for Mapping, Geodesy, Cadastre and Geoinformatics. The Survey is responsible for the national infrastructure in these areas as well as for a number of official functions. In the field of geodesy, the Survey operates as the National Geodetic Institute, adopting the reference ellipsoid, developing and maintaining the geodetic control network, defining the national datum, both horizontal and vertical and establishing an appropriate projection with accompanying mapping equations and transformations, for applications in mapping, cadastre and geoinformatics. In the realm of cadastre the Survey leads activities leading to land registration (Land Surveys Department). The registration of rights to land is based on Torrens principles, which in effect provides a state guarantee of the rights registered. The Survey is responsible for defining boundaries of blocks and parcels The Survey of Israel is the National Mapping Agency, responsible for defining mapping products required, with a special attention to construction infrastructures, security and emergency services, environmental protection, tourism and research and development.