Yes, a city should have an official map showing both its corporate boundaries and its ETJ. The map should be updated every time the city’s ETJ expands or shrinks, along with a note indicating the date of the change, any related ordinance or resolution number, and a reference to the minutes, ordinance, or resolution records in which the action is recorded. Id. § 41.001. Depending on how the map was created, the map may also need to include a disclaimer that reads something like the following: “This map is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. It does not represent an on-the-ground survey, but only the approximate relative location of property boundaries.” TEX. GOV’T CODE § 2051.102.
Every city must maintain a copy of the map in a location that is easily accessible to the public, including the city secretary’s office, the city engineer’s office (if the city has an engineer), and the city’s website (if the city maintains a website). TEX. LOC. GOV’T CODE § 41.001. Every city must also make a copy of its map publicly available without charge.
A home rule city is required to create, or must contract for the creation of, a digital map that must be made publicly available without charge and in a format widely used by common geographic information system (GIS) software. Id. If a home rule city does not have common GIS software, the city must make the digital map available in any other widely used electronic format. Id. Presumably, this provision authorizes a city without GIS technology to make its map available in a PDF format.
A map of the City of Fredericksburg City Limit Boundary and 1-Mile ETJ can be found here.