@incollection{TUW-119360, author = {Frank, Andrew U.}, title = {Pragmatic Information Content - How to Measure the Information in a Route Description}, booktitle = {Foundations of Geographic Information Science}, year = {2003}, pages = {47--68}, organization = {Matt Duckham, Michael F. Goodchild, Michael F. Worboys}, publisher = {Taylor {\&} Francis}, address = {London, New York}, isbn = {0-415-30726-0} }