• On the integration of object-based models and field-based models in GIS 

      Kjenstad, Kjell (Journal article; Peer reviewed, 2006)
      This paper proposes a common base-model for the classical object-based and field-based conceptual models in GIS. The model, which is called the PGOModel or 'Parameterized Geographic Object Model', is given a formal definition ...
    • On the use of parameterization in the implementation of geometry 

      Kjenstad, Kjell (Conference object, 2001)
      Parameterization of object-classes is an attractive approach during implementation of an object-oriented software system. This text discusses different cases of possible parameterization in the implementation of geometry ...