Topographic accessories serve as the fundamental reference points for planimetric and altimetric monitoring using total stations and optical systems, enabling the precise measurement of displacements on structures, terrains, and infrastructures. The product range includes reflective targets, optical prisms, mini prisms, convergence bolts, and benchmarks, designed for permanent installations and to ensure high stability, precision, and long-term durability. Installed directly on the structure or on the ground, these elements represent the physical measurement point on which topographic observations are performed, transforming actual displacements into highly accurate measurable data. Thanks to the wide variety of configurations and fastening systems, GESTECNO accessories can be adapted to any application context, from underground works to civil and environmental infrastructures.