The most important spatial attributes of any cadastral parcel are the coordinates of its boundary points, which define the extent of property rights. The derivative of the boundaries is the area of the parcel, which, in Poland, is determined based on the coordinates of the boundary points satisfying certain conditions. It is essential that the data entered into the real estate cadastre describing the areas of the parcels are of sufficiently high quality. For this reason, the authors of this research paper propose a three‐stage assessment of the quality of the area of cadastral parcels. The first stage involves analysis of the standardised values of selected attributes of the boundary points entered into the cadastral database, describing the accuracy of their position, the source of data capture, and the monumentation method. This forms the basis for evaluating the quality level of individual boundary points throughout the entire study area. Taking the geometry of the parcel into account, this information is used to determine the quality of the data on the areas of individual parcels, which forms the second stage of the analysis. The third and final stage consists in determining the global coefficient for the quality of areas of parcels in the study area. Such an approach provides a wide range of possibilities, both for carrying out unit control procedures and for comparing the quality of spatial data on parcel areas between individual cadastral districts or areas with a specific land use. The results of the analyses carried out on the research objects, i.e., on two cadastral districts located in southern Poland, have confirmed that the proposed method may also prove useful for other purposes. It is also a universal tool that can be adapted for use in other countries.
Abstract.A parcel is the most important object of real estate cadastre. Its primary spatial attribute are boundaries, determining the extent of property rights. Capturing the data on boundaries should be performed in the way ensuring suffi ciently high accuracy and reliability. In recent years, as part of the project "ZSIN -Construction of Integrated Real Estate Information System -Stage I", in the territories of the participating districts, actions were taken aimed at the modernization of the register of land and buildings. In many cases, this process was carried out basing on photogrammetric materials. Applicable regulations allow such a possibility. This paper, basing on the documentation from the National Geodetic and Cartographic Documentation Center and on the authors' own surveys attempts to assess the applicability of the photogrammetric method to capture data on the boundaries of cadastral parcels. The scope of the research, most importantly, included the problem of accuracy with which it was possible to determine the position of a boundary point using photogrammetric surveys carried out on the terrain model created from processed aerial photographs. The article demonstrates the manner of recording this information in the cadastral database, as well as the resulting legal consequences. Moreover, the level of reliability of the entered values of the selected attributes of boundary points was assessed.
Real estate cadastre is commonly recognized as a register of an actual state in the range of grounds, buildings and premises. It contains data which represent a standardized description of their fundamental attributes like location or surface area. According to the Geodetic and Cartographic Law, data contained in the cadastre are a base of the real estate taxation. However, this record may be recognized as fulfilled only in the case of cadastral parcel. In Poland, due to the separate rules of calculating buildings and premises usable floor area for the purposes of the real estate tax base assessment, which have been imposed by the Act of 12 January 1991 on Taxes and Local Fees, data revealed in the cadastre are unused. This article constitutes an attempt to compare the rules related to procedure of computing surface area of grounds, buildings and premises for cadastre and real estate taxation purposes in Poland. Author pays attention, inter alia, into a problem of a proper identification of spaces which are classified in whole or in part to the building usable floor area, depending on ensuing circumstances. The issue of methodology of calculating usable floor area of buildings and premises is analyzed as well. The complement of performed research constitutes a comparison between surface area of selected objects revealed in the cadastre and their equivalents which formed the basis for performed activities related to the determination of the real estate tax base assessment.
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