ABSTRACT
There are a number of survey problems where a coordinate transformation may give a convenient solution. It may occur that points with known coordinates should be transformed into another system, a number of points being given in both coordinate systems. Examples of these problems are: the so called two point problem where the coordinates of a station are determined by the establishment of an auxiliary point and observations to two stations previously fixed; the transformation of the coordinates of a local system to a system of a higher order, for instance a national triangulation; the re-establishment of (old) survey marks which have vanished or are disturbed; the calculation of offset points at both sides of a traverse line.
