It is a thermographic analysis carried out with a thermal camera with 8-14 microns spectrum response, thus operating in the second atmospheric window and avoiding reflection. Reflection could compromise thermal data acquisition, and therefore the quality of the final images. Data acquisition can be performed both with active and passive methodologies, with sampling techniques, focussing on seasonal, daily, or artificially induced transients, during temperature raising or diminishing. A custom software package is used to analyse data and produce thematic maps. A technical report is provided together with the thermal images collected, extracted features, and corresponding day-light images.

Average acquisition time: depends on the method chosen, generally at least a few hours