With the development of computer technology, the geodetic and cartographic resources are created in digital form. Currently the large-scale base map will be created from the several data sources: a real estate cadastre database EGiB, the GESUT geodetic database of utilities, the PRG national database of boundaries and areas of territorial division, the PRPOG national database of base geodetic control networks, the BDSOG databases of detailed geodetic control networks and the BDOT500 sets of topographical objects. Today, the key importance have a databases BDOT500, EGiB and GESUT which ensure the creation of databases in the standard 1:500 – 1:5000 cartographic scales. In the paper was presented characteristic of occurrence of errors in the planimetric data sets which data feeds for largescale map database. Was calculated values of characteristics of the numerical model of compositions of errors which are adequate for the particular methods of data acquisition for the large-scale maps. In the formulated compositions of errors of methods data acquisition was included factors stated in considered technologies. As the size of these factors were adopted: the minimum measurement errors, the mean errors and maximum errors. Discussed compositions of errors allow the calculation accuracy of large-scale digital maps, indicating also the uncertainty of the data what to be reckoned with deciding to use them. Was stated for digital map data obtained by surveys performed using an electronic tacheometer may be produced data for the level of the horizontal accuracy well-defined points from 0.04 to 0.14 m with mean error 0.07 m. The accuracy of large-scale map data produced based on results of surveys performed over 30–50 years using the orthogonal method of measurements and in recent years by the polar method, must reckon with the accuracy from 0.14 to 0.51 m with an average size of error 0.22 m. For the data acquired by manual vectorization of the orthophotomap raster image (on a scale 1:2000) meet the horizontal accuracy from 0.13 to 0.42 m with an average size of error 0.26 m (for well-defined points). In the case of data produced using the graphical-and-digital processing method (vectorization preceded by scanning maps) for analogue base maps on a scale of 1:5000 may be produced data for the level of the horizontal accuracy with the minimum error 1.26 m, the mean error 2.40 m and maximum error 5.56 m.

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