Geodetic Fundamentals in the Development of a Voxel Model for the Subsoil of the City of Sevilla (Spain) Topics: Cartography and Geodesy; Geodesy; Spatial Data Quality and Uncertainty; Underground Geo-Reserves Modeling In Proceedings of the 10th International Conference on Geographical Information Systems Theory, Applications and Management GISTAM - Volume 1, 144-151, 2024 , Angers, France