The current situation in land leasing in Ukraine is analysed, when a tenant of a land parcel with immovable property is sold in part, which causes the following controversy: the land parcel in someone’s lease has buildings or constructions owned by another physical or legal person (other than the tenant). The interested party wastes a lot of time on resolving this controversial situation with the existing procedures in Ukraine. This problem is not always solved professionally because of the lack of sellers’ and buyers’ knowledge of specific features of land management and geodesy. Three main variants of mutual location of the seller’s and the buyer’s buildings and constructions are defined, which determines the possibility of dividing a land parcel. Recommendations on the improvement of the procedure and normative legal acts of Ukraine concerning the issue are developed, aimed at significant acceleration of signing and registering new lease agreements.

The systemized and methodically arranged according to the principles of geographic information systems set of the most important objects of Lithuanian territory’s geodetic base and topographic databases (GDR10LT) is collected and kept in data storage and covers the whole territory of Lithuania. The purpose of the georeferential base GDR10LT at the scale 1:10 000 is to collect, keep, use, renew and provide data to users. The literature analysis shows that the majority of authors presented studies about data composition and application but they did not analyse their reliability. The aim of the research was to revise the chosen territory of the georeferential base map by the field method and to determine the discrepancies between the situation in the area and in the map as well as the reasons of such discrepancies. It was necessary to verify the data reliability and outdated map information due to changes of the situation. The field research was conducted in three different areas, and the data was processed using tools provided by www.zis.lt. Statistical data analysis was performed using Microsoft Excel software. The object of the research was information depicted in georeferential base map (GDR10LT) of the chosen territories. The following research methods were used: literature analysis, analysis of cartography material, collation of field data, statistical data processing, and interviews. The conclusion can be made that GDR10LT data are reliable; two mistakes were found in the plot of 6407.5 hectares: a navigational obstacle and 800 metres of asphalt cover were not marked. Other determined discrepancies covered the territory of 17.46 hectares. The outdated map information was found. The marking of settlements generally were mismatched because of many new buildings in the area that were not mapped. Therefore GDR10LT should be updated more often in accordance with ORT10LT data.