As any rocket does not fly without accurate sensors, so the construction of the landscape is not possible without working documentation with height marks.
The priority in landscape design is the primary correct topographic survey of the country site. How many times I did not happen to draw landscape designs, not all came to the final realization. In view of the sometimes big savings on the part of the customer to work in draft version is very missing competent toposurvey. As any rocket can not fly without accurate sensors, the construction of the landscape is not possible without working documentation of the height markings. Plus - minus 100 mm of height over the entire area of the site turns into HUGE cubes of fertile soil or other loose material, which was not provided in the estimate - and the construction gets up until you find the missing money. Toposurvey also should not be no matter what, as it must necessarily be present: local height benchmarks (large stones, the height of the mark of the entrance road and other significant elements), isolines with a step of 250 mm. A