Structural Health Monitoring (SHM) is the process of implementing a strategy for damage detection of structures and infrastructures, with several application to aerospace, civil or mechanical engineering. An important activity for SHM is the so-called Optimal Sensor Placement (OSP), that aims to customize the monitoring system over a target structure: it allows to identify the optimal positions of the sensors, maximizing the spatial resolution of the detected quantities, e.g. the vibrating modes, especially when a limited number of sensors is available to cover a spatially extended structure such as civil or aerospace systems. In this framework, an interesting and beneficial approach appears to be a multi-disciplinary one, which aims to apply Remote Sensing (RS) data to OSP.