Base Net

a system of triangles used in geodetic measurement that permits a traverse of the required accuracy from the short base line measured directly on location to the longer (base) side of one of the triangles constituting the actual triangulation. Base nets are constructed when direct measurement of the base sides is impossible or economically prohibitive. The form of a base net is usually similar to a rhombus, the short diagonal of which serves as the base line and the long diagonal of which serves as the base side of the triangulation.