Use of global magnetic models for updating the magnetic declination diagram in topographic maps

Abstract

In this article, the values of Magnetic Declinations corresponding to the center of the sheets of nine nomenclatures of topographic maps at a scale of 1/25000 of different regions of the country referring to the epoch January 1, 2021 are compared with those obtained by the Magnetic Models of the year 2017(WMM 17); 2020 (WMM 20); and the so-called standard global model of the International Reference Geomagnetic Field IGRF 2020, for the same nomenclatures, places and times. Through a statistical analysis, conclusions are reached about the feasibility of using the Magnetic Model used and the one that best fits our country.