A two-dimensional direction-length framework is a pair (G, p), where G = (V ; D, L) is a graph whose edges are labeled as `direction' or `length' edges, and a map p from V to R2 . The label of an edge uv represents a direction or length constraint between p(u) and p(v). The framework (G, p) is called globally rigid if every other framework (G, q) in which the direction or length between the endvertices of corresponding edges is the same, is `congruent' to (G, p), i.e. it can be obtained