The grid contains the outlines of photogrammetric image sections for Zone 35.
The grid was created by drawing kilometric grid lines that divide the national territory into square sections measuring 10 x 10 km, starting with coordinate 250,000, increasing eastward, and coordinate 5,350,000, decreasing southward.
The name of each section is determined by the first two digits of the East coordinate and the first three digits of the North coordinate in the UTM Zone 35 projection for the top-left corner of the section.