The SOC is an integrated network of geometric grids coded for the rapid location of elements for rapid positioning in the territory, at any level of resolution. The data set is made up of two layers: the Quadrants layer (SOC5), formed by a grid of quadrants of 5 km on a side and the Sections layer (SOC1), formed by a grid of sections of 1 km on a side.

Grids at different resolutions (1x1 km, 10x10 km, etc.) that express the UTM coordinates of Catalonia (ETRS89 zone 31 North) according to the Military Grid Reference System (MGRS).