To the consideration of territory relief features in the land cadastre

The aim of the research is to define the features of the relief of land plots of a territorial community (TC) in the mass valuation. The paper explains the use of a three-dimensional cadastral registration system on the example of one object, i.e., one TC. t This results in the classification of TC land plots based on certain characteristics. Methodology. For the study, a digital terrain model was created for the object located in the Pokutska plain territory of southwestern Ukraine, on the territory of Uhrynivska TC in Ivano-Frankivsk district of Ivano-Frankivsk region, northwest of Ivano-Frankivsk. The characteristics of the land on the slopes were obtained by mathematical modelling using the SURFER software package. Two methods were used to calculate the amount of solar energy falling on a certain area of the Earth's surface:  astronomical and technical. Each of the methods gives approximately the same result. Results. The digital model was used to create a 3D terrain model with the distribution of the study area by slope steepness. According to the model, slopes with slope angles of up to 3° prevail within the territorial community. Steeper slopes can be observed in the northwestern part of the Uhrynivska territorial community and on the southwestern slopes of Vovchynetskyi Hill (up to 17°). The paper shows the distribution of the solar energy coefficient received by a particular area of the Earth's surface, depending on its exposure and angle of inclination The solar energy coefficient distribution map allows visualizing the insolation of a particular agricultural land. It can be used to calculate the insolation, i.e., the amount of solar energy received per unit area, and subsequently used in the expert assessment of land plots. In this way, it is possible to determine the total amount of heat that falls on each land plot during the day or the entire growing season. Mathematical modelling methods were used to obtain the illumination characteristics of land on slopes. Novelty and practical value. The experimental studies of the three-dimensional cadastral registration system aimed at allocating surface areas with specific slope orientations have yielded valuable results. These findings can be applied to the study of the Earth's surface relief, which significantly influences  the fertility of agricultural land. , Additionally, this relief plays a critical role in  environmentally hazardous phenomena, including the formation of ravines, floods, mudflows, landslides, and avalanches. Therefore, developing and improving a three-dimensional cadastral registration system for surface areas is an urgent task for the TC. Our research will contribute to the objectivity of mass assessment, allowing us to extend the methodology we have applied to other regions of Ukraine and abroad.