We introduce the first map of density data in Northeastern Spain which can help in the interpretation of gravimetric surveying. The background map is a simplified version of the Geode continuous geological cartography (scale 1:200.000) of the Iberian Range and Ebro basin. These maps are synthetic and homogeneous maps based on previous 1:50,000 scale geological maps (MAGNA). The map uses the ETRS89 datum and UTM coordinates (30T northern zone) and covers an area of 140,000 sq km. The compiled data shown in the map come from previous papers of the region (≈ 700 points) as well as from more than 800 additional points developed in the course of an exploratory project focused on the underground characterization of a potential CO2 reservoir in the so-called ‘Linking Zone’. The new data accomplish some basic criteria; they are accurately georeferenced and lithology, stratigraphic age and other technical details about the measurements (e.g. means and error) and methods are fully displayed. Unidad de Zaragoza, Instituto Geológico y Minero de España, España Departamento de Ciencias de la Tierra, Universidad de Zaragoza, España Unidad de Tres Cantos, Instituto Geológico y Minero de España, España Departamento de Geología y Geoquímica, Universidad Autónoma de Madrid, España Departamento de Física Aplicada, Universidad de Burgos, España Institut de Ciéncies de la Terra Jaume Almera, España