Dr. Karel Kriz
Institute of Geography

University Vienna
Universitätsstrasse 7

A-1010 Wien
Austria

karel.kriz@univie.ac.at

Prof. Dr. Lorenz Hurni
Institute of Cartography

ETH Zürich
Wolfgang-Pauli-Strasse 15

CH-8093 Zürich
Switzerland

hurni@karto.baug.ethz.ch

Stefan Räber
Institute of Cartography

ETH Zürich
Wolfgang-Pauli-Strasse 15

CH-8093 Zürich
Switzerland

raeber@karto.baug.ethz.ch