The Basic Topographic Map of the Czech Republic at a scale of 1 : 25 000 in the planar coordinate system of the Uniform Trigonometric Cadastral Network (S-JTSK), hereinafter referred to as ZTM 25/S-JTSK, is a fundamental state map series. As of 1 July 2023, ZTM 25/S-JTSK replaces the Basic Map of the Czech Republic 1 : 25 000 (ZM 25). ZTM 25/S-JTSK depicts the entire territory of the Czech Republic in a continuous layout of map sheets; the country is shown on 717 map sheets.
The section lines of the layout (inner frames) of the ZTM/S-JTSK map sheets form rectangles whose sides are parallel to the S-JTSK coordinate axes and measure 500 mm in the Y-axis direction and 400 mm in the X-axis direction at the given map scale. A ZTM 25/S-JTSK map sheet therefore covers an area of 12.5 km × 10.0 km. The dimensions do not include additional elements shown in the printed version of the map sheet (e.g., overlap bands and frame and marginal information). The printed map, including all frame and marginal information, measures 480 mm × 770 mm.
The ZTM 25/S-JTSK map sheets are designated using an alphanumeric nomenclature that specifies the position of the ZTM 25/S-JTSK sheet within the map sheet of a smaller scale from which it is derived. Map sheets are additionally labelled with a sheet name, usually identical to the name of the largest settlement found on that sheet; for ZTM 5/S-JTSK, ZTM 10/S-JTSK and ZTM 25/S-JTSK, this corresponds to the name of the relevant ZTM 50/S-JTSK sheet. If no settlement occurs on the sheet, another unique geographical name (a peak, watercourse, or land plot name) from the sheet is used. ZTM 25/S-JTSK sheets are created by dividing a ZTM 50/S-JTSK sheet into four sheets using 2 rows and 2 columns, designated within the ZTM 50/S-JTSK sheet in order, by rows, from the northwest corner, with the letters a, b, c, d. A map sheet designation example is Žďár nad Sázavou 0506-D-c.
ZTM 25/S-JTSK contains planimetric features, hypsography, and descriptive information. Planimetric features include settlements and individual objects, transportation networks, hydrography, boundaries of administrative units and cadastral areas, boundaries of protected areas, vegetation and land surface. Hypsography represents the terrain using contours with a basic interval of 5 meters, terrain steps, rock formations, ravines, landslides or scree, isolated rocks and boulders, groups and rows of stones, and spot heights with elevation values. The descriptive map content includes standardized geographical names, names of municipalities and their parts, object type designations, contour labels and spot height labels, and names of protected areas. The printed map sheets and PDF map background files also include the S-JTSK and ETRS89-TMzn kilometre grid and the ETRS89 graticule, a map frame with marginal information (e.g., directional data for selected roads, names of shared settlements, neighbouring countries, coordinates) and marginal data (e.g., legends, imprint information, graphic, numerical and slope scales, interpolation scale of the ETRS89 coordinate system graticule, graphic representation of map sheet layout, meridian convergence and magnetic declination, graphical overviews of administrative and cadastral boundaries and protected area boundaries, etc.).
Map content features are depicted only within the territory of the Czech Republic. To ensure visual clarity of the map, the depiction of planimetric features in ZTM 25/S-JTSK uses cartographic generalisation methods — census and normative selection (removal of features based on quantitative and qualitative parameters, possibly further reduction of the number of features), geometric generalisation (displacement, shape simplification), cartographic displacement or enlargement of small dimensions, and classification change (grouping multiple categories of features into one). When depicting buildings, the application of aggregation is permitted.
The processing of ZTM 25/S-JTSK data began in 2020 and full coverage of the Czech Republic was completed in April 2023. The map is produced using digital technology from the Fundamental Base of Geographic Data of the Czech Republic (ZABAGED^®) and the Geonames database of geographic names of the Czech Republic.
The creation and updating of ZTM 25/S-JTSK is ensured by the Czech Office for Surveying, Mapping and Cadastre, which publishes ZTM 25/S-JTSK data free of charge as open data in the form of data files containing the map content including marginal information corresponding to the map sheets in PDF format (PDF print files), in the form of georeferenced data files corresponding to map sheets in TIFF format (TIFF raster tiles), and in the form of vector data files with the ZTM 25/S-JTSK cartographic model corresponding to map sheets in SHP and DGN8 formats (SHP/DGN8 vector data).

The product’s data files are provided in selected formats via ATOM download services as open data, free of charge, under the Creative Commons CC BY 4.0 licence.

Another way to obtain data is by exporting data extracts in the GeoViewer application.

To order data in additional formats or through other distribution methods, you can use the e-shop