The excavation is the formation of horizontal surfaces. In many cases it is necessary, reinforced by retaining walls. When designing a future garden, the first thing is to develop a vertical layout.

The garden development requires the construction of horizontal terraces for planting and grassing, but overall alignment in the slope areas is dysfunctional. This is one of the reasons for using a variety of methods for terracing. This functional solution helps not only for terrain modeling, but also prevents and protects the soil from erosion by building retaining walls and gabions.