The Basic Topographic Map of the Czech Republic 1:5 000 in the plane coordinate system of the European Terrestrial Reference System 1989 in the Universal Transverse Mercator projection of meridian zones (ETRS89-TMzn), hereinafter referred to as ZTM 5/ETRS89, extends the national map series from 1 January 2026 as a variant of ZTM 5 in the plane coordinate system ETRS89-TMzn. It thus represents an alternative to ZTM 5 in the national coordinate system S-JTSK. In terms of content, ZTM 5/ETRS89 does not differ from the primary ZTM 5/S-JTSK. The map is available as print files in PDF format (CMYK) containing the complete content of the map sheet and in raster form in TIFF format (RGB, 24-bit colour depth, resolution 508 dpi, LZW compression). The distribution unit is a ZTM 5/ETRS89 map sheet. In the case of the print PDF, the map sheet size is 500 × 790 mm; in the case of the raster TIFF tile, the segment size is 411 × 522 mm. The position of individual tiles in the coordinate system is ensured by world files (TFW). ZTM 5/ETRS89 covers the entire territory of the Czech Republic in a continuous map sheet layout, represented on 18 287 map sheets. Similarly to ZTM 5/S-JTSK, from which it is derived, ZTM 5/ETRS89 contains planimetry, altimetry, and map lettering. Planimetry includes settlements and individual objects, transport networks, hydrography, boundaries of administrative units and cadastral units, boundaries of protected areas, points of horizontal geodetic control, vegetation, and land cover. Altimetry represents terrain relief depicted by contour lines and terrain steps. Map lettering consists of generic object designations, standardised geographical nomenclature (including street names), contour labels, spot heights, and building numbers. Only objects occurring within the territory of the Czech Republic are depicted. Necessary generalisation and displacement of individual objects are applied only to a very limited extent. The map provides detailed information about the defined territory with high positional accuracy while preserving the shape and size of depicted areal topographic objects as in the source databases. The print PDF file additionally contains the kilometre grid of ETRS89-TMzn and S-JTSK, the geographical grid of ETRS89, the map frame with frame data (e.g., directional information for selected roads, names of neighbouring settlements and descriptions of neighbouring countries, coordinates), and marginal information (e.g., legend, imprint data, graphical, numerical and slope scale, interpolation scale of the ETRS89 geographical grid, map sheet layout overview, meridian convergence and magnetic declination, overview of administrative and cadastral boundaries and boundaries of protected areas).