The Base map of the Czech Republic 1 : 50,000 (ZM 50) was published as a product of the state map work since 1970. From the middle of 2023, it was replaced by the product of the new edition of the state map work, the Base Topographic Map 1 : 50,000 (ZTM 50). Map sheets including out-of-frame data are archived in PDF format with the update status from the last edition of the map before switching to the new SMD edition.
ZM 50 has been processing by digital technology using Fundamental Base of Geographic Data of the Czech Republic (ZABAGED ®) and Database of geographic names of the Czech Republic Geonames with enhanced map content and enhanced colour resolution of selected types of vegetation and areas since 2002.