New techniques for land surveying, monitoring and environmental diagnosis: a comparative analysis

The use of GIS allows the analysis, the evaluation and the measurement of the condition of a territory and its sensitivity to specific phenomena, in order to be able to direct programmatic strategies and planning actions in order to address the action of territorial government on the basis of the emerged issues. The greatest efficiency of these systems can be achieved only by using constantly updated data both in the time domain component and in the space domain component. The modern survey techniques made with UAV (Unmanned Aerial Vehicle), better known as Drones, represent the new frontier of the sciences and of the environmental engineering, because they allow high speed and accuracy in the acquisition of information, and they give the possibility to compute, in real time, a wide amount of data. The possibility to obtain 3D high resolution model (HRM) in short time periods, open a new way of considering land survey, by making UAV essential instruments in diagnosis and environmental monitoring. The main objective of this work is to analyze the integration between GIS– UAV systems through an overview of the most used software, both for the acquisition stage of the primary data and its processing. With this analysis it is possible to highlight the main advantages and disadvantages, by tracking the new analytical skills and environmental monitoring that were made possible thanks to the advent of highly sophisticated but easily accessible instrumentations.