“…Therefore, the task of trimmed surfaces reparametrization is fundamental if this geometry is used in a CAD/CAM chain. The algebraic interpolation method or bi-linear method (Coons method) (Farin, 1993;Rogers, 1990) and the Laplace method (Yang, 2003;Lehtimäki, 1999) are the two principal methods, the first due to its simplicity and the latter because it solves some problems of the first. In both methods the 2D parametric dominium of the trimmed surface is reparametrized in a new 2D parametric dominium.…”