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The goal of this paper was to evaluate the possibility of using terrestrial laser scanning (TLS) for inventorying of a hybrid constructed wetland (CW) wastewater treatment plant. The object under study was a turtle-shaped system built in 2015 in Eastern Poland. Its main purpose is the treatment of wastewater from the Museum and Education Centre of Polesie National Park. The study showed that the CW system had been built in compliance with the technical documentation, as differences between values obtained from the object and those given in the design project (max. ± 20 cm for situation and ±5 cm for elevation) were within the range defined by the legislator. It was also shown that the results were sufficiently precise to be used for as-built surveying of the aboveground elements of the CW system. The TLS technique can also be employed to analyse quantitative changes in object geometry arising during long-term use (e.g. landmass slides or erosion), the identification of which can help in selecting the hot-spots at risk of damage and thus restore the object to its original state as well as prevent new changes.

The article has analytical and conceptual character. It contains a detailed analysis of the scope of cadastral information on waters based on actual data from the regional databases, which are established in four logistically major cities in Poland: Warsaw, Krakow, Wroclaw and Szczecin. The authors examine the contents of water cadastre databases in Poland and possibilities of using them in building the 3D cadastre. The concept of using water cadastre as a subsystem of the 3D cadastre presented in the work was carried out using graphical methods of the object-oriented analysis. The authors present a Real Estate Cadastre (REC) model based on synchronisation of the Land Register databases with the water cadastre databases carried out in District Water Management Boards. Modernisation and thematic expansion of Land Register databases, which act in Poland as cadastre, consistent with the presented REC model is a chance to improve the real estate market in Poland.