Gradient-Based Analysis of Vertical Displacements in Urban 3D LiDAR Models Using SAR Data

This study proposes a method for integrating SAR interferometric data, provided by the European Ground Motion Service (EGMS) under the Copernicus program, with simplified three-dimensional models obtained by combining Regional Topographic Databases (RTDB) and LiDAR (Light Detection and Ranging) data. Historic buildings are represented within the Google Earth 3D environment and classified according to the gradient of vertical displacement velocities calculated from the SAR data. This combination enables not only an immersive and interactive visualization but also a dynamic interpretation of structural changes over time. The historic center of the Municipality of Salerno serves as the test area for the proposed approach. This method offers a simple yet effective tool for monitoring and managing built heritage, making complex analyses more accessible through user-friendly platforms.