EEMstudio: an open-source freeware QGIS plugin for processing, modelling and inversion of electric and electromagnetic data

The typical workflow in electric and electromagnetic methods includes the acquisition of the data, processing of the received signal and inversion to achieve a model of the electrical properties of the ground. The data processing is a crucial step that defines the outcome of the resulting model. The electromagnetic method, in fact, as well as the induced polarization in galvanic acquisitions, is particularly susceptible to the systematic noise caused by anthropogenic infrastructures. Therefore, it is mandatory to remove the noised data in order to retrieve reliable models. The standard method for this task is the visual culling of the data that are most affected by noise and interferences (the so-called outliers), through software with graphical user interfaces designed with this specific aim. EEMstudio is a QGIS plugin that allows to visualize electric and electromagnetic data, to select and remove outliers, as well as modelling data and launch inversions though the modelling and inversion kernel EEMverter, keeping always a link to the map during the process. EEMstudio is composed by a docked widget in QGIS where the soundings are plotted, a main window for data processing, equipped with ad hoc plots to visualize the data, and other windows for launching forward modelling on synthetic data as well as inversions, having all the useful tools in a minimum space. Furthermore, EEMstudio is distributed as a freeware and open-source tool, accessible to anyone and editable to suit new necessities, under the EUPL 1.2 free software licence.