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The research is based on the vector layers of a Digital Forest Map (LMN), such as: transportation, forest districts, departments, allotments, as well as vectorized elements of the transportation network of the Niepołomice Forest obtained from geodetic materials, mainly from topographic maps. Transportation lines (356.6 km) were vectorized on the basis of the data contained in the State Geodetic and Cartographic Resource (PZGiK), the majority of which were field and forest dirt roads (48.8%). The percentage of paved roads no more than 3 m wide was smaller by nearly a half (24.6%), while contribution of farm dirt roads and paths was similar and added up to about 13.8% and 11.6% respectively. Paved roads 3–7 m wide constituted the smallest percentage of the transportation lines – slightly more than 1.1%. In comparison, the total length of transportation lines included in the LMN maps 419.7 km. GIS spatial analyses were carried out for the selected discrepancies between the transportation lines included in the LMN and the ones vectorized on the basis of PZGiK data. As a result, it was discovered that the total length of the transportation lines vectorized from the geodata and not found in the LMN equaled 61.7 km. On the other hand, the length of communication routes included in the LMN, yet missing from the PZGiK data, amounted to 125.8 km. In both instances, it was mainly field and forest dirt roads (approximately 70%) that contributed to the discrepancies, followed by paths (28%). The transportation lines in case of both sources were congruent for 294 km of objects. Additionally, it was observed that the objects within the LMN were misaligned with respect to the transportation routes presented in topographic maps. In most situations, however, the divergence ranged from 0 to 5 m. As a result of the research, a map of the transportation network within the Niepołomice Forest was devised, which included the roads and paths of the LMN, supplemented by the communication routes vectorized from geodata.
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