The National Land Survey of Finland has made a strategic decision to pursue increased use of open source solutions in its activities. We’ve been an active user of FOSS4G solutions for more than a decade. Further, we created an open source mapping framework Oskari, which has an active user and developer community. In autumn 2020, the National Land Survey of Finland made a major decision to build our new topographic data production system on open source components, such as QGIS and PostgreSQL/PostGIS. The decision has raised a few eyebrows and a lot of interest among other national mapping agencies as well as other institutions using geospatial software. This talk will discuss - on what grounds we made such a decision - how we are progressing with the implementation - how we are looking at engaging in collaboration with open source communities - and most importantly, why every public sector organization should consider the benefits that can be gained by using and investing in open solutions.