The patent covers a combination of hardware and software.
The real story is that the competition's technology is only accurate to several inches and thus is inadequate for the required periodic structural safety analysis required and for structural analysis needed to plan for and to prep for and install upgrades.
The SGSI Drone/software package is accurate enough to enable structural force vector analysis (amount of stress, bends, etc) in beams based on measurements as you mention down to about 2-3 mm. The best other tech out there is only good to 2-3 centimeters per prior SGSI/Mvtg PRs and SEC fillings.
The second thing is that they have the clients and existing business to use the drone mapping to grow sales and take customers from others that do not have it. At some point, once the patents are issued, they could, if they choose license to others, to do structural analysis surveys of bridges, dams, utility power towers, and storage tanks and columns in chemical plants.... Even mountain range stress for volcano and earthquake fault line stress analysis that can be used to predict eruptions and quakes.
I suspect they are also using it to test speed, Gigabit and quality of signals from towers as they exist to determine where they need to add cell units....
All of which give them a sweet marketing edge over competition to help keep and add new clients.
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