Utilisation of Land Registry Data in Planning

Knowledge of ownership and other legal relations in the planned construction site enables planning the route in advance so that the actual preparation and implementation of the project is as efficient as possible from the perspective of property rights. The route can avoid parcels with multiple owners, unknown owners, or otherwise problematic owners.

The cadastral data (CN data) is managed within the Czech Republic by the Czech Office of Surveying and Cadastre (ČÚZK), which provides complete data for a fee in the form of web services or bulk data exports to data files. In order to optimise the cost of the purchased data, an analysis was carried out, which showed that the most appropriate way to purchase the data is by means of data files containing only the parcels affected by the construction polygon. Since the CCHR does not support this type of purchase, the fact that HSI, as the processor of the entire solution, has the status of a CN data distributor was used, which allows it to sell only selected data from the entire dataset to the customer that is related to the construction polygon.

In terms of content, the complete dataset is used, i.e.:

• information about the property;
• information about the property owner;
• information about other legal relations on the property (liens, easements, etc.);
• information on pending and ongoing proceedings on the property.

The actual solution of the entire Data KN project consisted of 4 functional units:

• Ordering data
  Support for the CN data ordering agenda has been created within the existing GIS system. Within this agenda, a workflow has been implemented in relation to the construction process management IS, which, based on the defined rules at a given project phase (after project approval in a specific phase), creates an order for CN data, which is transferred and entered into the records on the processor side using a web service.
• Optimised data purchasing and delivery
  The data purchase and delivery phase takes place in the processor's infrastructure, where, after the order is received, the data is purchased, processed, and published to the customer. This process strictly follows the rules of the CCHR. After receiving the order from CETIN, which contains the coordinates of the construction polygon, the affected cadastral territories are
  identified using DB RUIAN, for which cadastral data are ordered through the interface of ČÚZK. After the data is loaded, the data is cropped in the processing environment and published to the CETIN repository. For each order, i.e., for each construction polygon, one data file containing CN data for this area is created. Only data that are inside the polygon are charged to the CETIN.
  The whole process of ordering and processing is described in the figure.
• Import and processing of data in CETIN
  After publishing the data to the CETIN storage, the data is imported into the working database (MS SQL). As part of the import, the data in each table is historized so that one revision is created for each data set (data for one construction polygon valid on one specific date). This system will allow subsequent applications to obtain the entire data valid at the time of processing, even in the case of overlapping polygons. After the import of the CN data, a service that supplements the CN data with information from the bypass register (ARES) is still running. The following information is added:
  • information on the legal entities that are the owners of the real estate concerned;
  • information on the HOA (unit owners' associations) of the apartment buildings affected by the construction polygon
    From the working database, after import and historization, the data are transferred by CETIN integration services to other DBs, from where they are used by specific systems.
• Use of data in CETIN applications
  In the framework of the project, two basic tasks have been processed in the GIS system that uses CN data.
  • Creation of a map of impassable parcels - based on predefined rules (number and structure of owners, number and structure of other legal relations), the system performs calculations over the CN data and divides the properties into several groups according to the passability. A map with a legend showing this division is created.
  • Dialling a widget within the GIS system, which, when a parcel is selected on the map, displays information about the owner, other legal relationships, and.