Necessity of 3D Cadaster and Possible Cases

Abstract

The paper describes the current state of cadaster and land registration in Bulgaria. The objects of cadaster are clarified. The necessity of information about rights, restriction and responsibilities increases in complex spatial situations. After a brief review of cadastral and land registration legislation, the possibility of future development of a 3D presentation of the cadastral objects is presented, taking into account the current state of the cadastral system in Bulgaria. The prerequisites, the possibilities and the means for application of 3D cadaster in Bulgaria are clarified and the challenges to its realization. Problems concerning the design of an efficient system for land administration, possible technologies and standards for realization of 3D cadaster are described. The possible data sets, in accordance with ISO 19152, which should be present in the realization of 3D cadaster in Bulgaria are analyzed. In addition to the data from the digital model of the cadaster, specialized data is also needed. Some of the specialized objects require a three-dimensional representation, which is a prerequisite for 3D cadaster development. Many of the various specialized objects impose restrictions on land immovables, even though the presence of the object itself is not required. Schematically are described the necessary steps to go through to unify data and achieve interoperability.