%0 Journal Article %T Was es in der kartographischen Darstellung raumbezogener Informationen noch zu erforschen gibt [What still needs to be researched in representing spatial information cartographically] %A Dirk Burghardt %J Meta-Carto-Semiotics %D 2009 %I Meta-Carto-Semiotics %U http://meta-carto-semiotics.org/uploads/mcs_vol2_2009/mcs_2009_2_burghardt.pdf