Geographic information represents, within the European Policy for Geographic Information a complex part of information society which changes continously and which has a wide range of applicability. This can be groupped into two categories: spatial, geographic information and descriptive,...

In this paper, we consider a number of algorithms for estimating the parameters of ME models, including iterative scaling, gradient ascent, conjugate gradient, and variable metric methods. Surprisingly, the standardly used iterative scaling algorithms perform quite poorly in comparison to the...