The maps illustrate the transformation of Tarnagul from 1900 to 2000. Overall, the town shifted from a primary production base to a service-oriented area, with significant changes in land use and infrastructure.
In 1900, the town was defined by agricultural activities, featuring a dairy farm west of the river, and orange and mandarin orchards surrounding the central town area. By 1950, the dairy was replaced by a lemon and grapefruit plantation, and the southern mandarin orchard was converted into an orange grove. Furthermore, packing sheds were established to the east, served by new railway tracks.
By 2000, the agricultural landscape had been largely repurposed. The western plantation became a wildlife sanctuary, while the northern and southern orchards were left unused. The packing sheds were converted into a local museum and a craft market, and the railway tracks were removed. Additionally, a new park was developed south of the town area, and a tourist shop was added near the former railway site. Throughout the century, the central town area remained, while the road and river infrastructure persisted as constant features of the town's layout.