Geomagnetic Maps and Models of Spain

The Geomagnetic Maps and Models of Spain product presents three different types of documents. 1-Geomagnetic map of Spain for a given reference period: It consists of between one and five cartographic documents, covering the peninsular territory of Spain and that of the Balearic Islands or, alternatively, the territory of the Iberian Peninsula and the Balearic Islands. Each document contains the isolines of a given component of the Earth's magnetic field and may also contain the isopores (secular variation isolines) corresponding to the component. The five possible documents are the maps of Magnetic Declinations (magnetic declination, D), Horizontal Isodynamics (horizontal component, H), Vertical Isodynamics (vertical component, Z), Total Isodynamics (total field, F) and Isoclines (magnetic inclination, I). 2-Map of Magnetic Anomalies: It generally represents the isolines of the residual field (difference between the strength of the magnetic field at a given reference epoch, obtained from the processing of measurements of airborne sensors, and the total field predicted by the IGRF model for the same epoch). Alternatively, the map may consist of different cartographic documents containing the anomaly isolines corresponding to components D, H and Z. Depending on the date of publication, the map covers the peninsular territory of Spain, the Iberian Peninsula, the Iberian Peninsula and the Balearic Islands or the Canary Islands. 3- Geomagnetic reference model for the Iberian Peninsula and the Balearic Islands in 2020.0: It is a regional model of main internal geomagnetic field that allows synthesizing the components north (X), east (Y), Z, H, F, D and I, as well as the secular variation corresponding to each component, at any point in the territory and with reference to the time 2020.0. The model is materialized in a file that provides this data at the points of a regular mesh that covers the entire territory.