Establishing new CRS inside Europe: practical considerations

North Macedonia is considering defining a new Coordinate Reference System for the country, modernizing an old one more than hundred years old. This talk shows the different meaningful alternatives you can choose and expresses a recommendation. This analysis is done after looking at several countries and their actual usage of modern or old CRSs. As PROJ.org contributor, it insists in the Open Source and Open Data importance in geodesy and cartography. Have open and free access to data and transformations make all the geography process more transparent. Specially in cadastral data. EPSG serves as as a common registry for this information, making it freely available to users and software developers.