The project originates from a precise and simplified cartographic updating methodology introduced by the Consortium of Municipalities of the Province of Bolzano in the early 2000s. Over time, this methodology became well-established but could no longer be applied after the adoption of the Territorial Data Catalogue (Ministerial Decree 10.11.2011, “Technical rules for defining the content specifications of geotopographic databases,” and subsequent amendments) due to the complexity and structure of the new national model. The primary objective of the project was to identify and define a minimal set of information capable of adequately describing the territory for the typical use cases of public administration. This approach aimed to ensure sustainability by enabling consistent updates and alignment with territorial transformations. A crucial step in supporting territorial management was simplifying the definition and comprehension of the fundamental technical layer required for geotopographic databases, which public administrations producing geographic data must guarantee as part of their institutional activities. The Basic Core (BC) specification was developed by reorganizing and simplifying the information layers outlined in the National Territorial Data Catalogue. This process focused on a minimum subset of information, referred to as the National Core (NC), while excluding content already managed by the Provincial Administration within existing archives or sectoral Information Systems. Additionally, data considered three-dimensional—now more easily obtainable through modern, accurate systems—was also excluded. To enhance practical usability, the Basic Core specification includes only themes that are both objectively useful and straightforward to update. This streamlined approach ensures alignment with existing maintenance workflows and supports efficient territorial management.