Semiautomatic analysis of EGMS InSAR data for geohazards detection: a study on Lazio Region (Italy) through ADATools

Ground deformation analysis through satellite Multi-Temporal Interferometry Synthetic Aperture Radar (MTInSAR) techniques is a well-established practice. A significant breakthrough in this field was the Sentinel−1 (S−1) satellites launch in 2014, providing global, open-access, millimetre-accuracy data. This has paved the way for the European Ground Motion Service (EGMS), an unprecedented Land Monitoring initiative within the European Copernicus programme supplying free, homogenous, annually updated S−1 data. Despite its immense potential, EGMS data remain underexploited due to their volume and complexity of interpretation, particularly for non-expert stakeholders. To address this, the European research project EGMS RASTOOL (DG-HECHO), financed by the Union Mechanism of Civil Protection (UPCM) of the European Commission, has developed ADATools for maximising EGMS utility for geohazard detection and risk assessment. ADATools enable the semiautomatic identification and classification of Active Deformation Areas (ADAs). This study applies ADATools to the Lazio region (Italy), showing their structure and functionality in detecting areas affected by different types of ground movements. The analysis covers the whole region, with three case studies focusing on settlement, the most widespread deformation, landslides, and sinkholes, a well-known issue in the region. Results highlight the effectiveness of semi-automatic methods for interpreting S−1 data, offering a replicable framework for geohazard analysis.