@phdthesis{TUW-258909, author = {Hahn, J{\"u}rgen}, title = {Context Algebra applied to Spatial Concepts}, school = {Department f{\"u}r Geod{\"a}sie und Geoinformation, FG Geoinformation}, year = {2016}, keywords = {Kontext, Kontext-Algebra, Kontext erweitertes Semiotisches Dreieck, Geographische Konzepte, Modell f{\"u}r nahe} }