Johannes Keukelaar

Rough and fuzzy geographical data integration

Ola Ahlqvist, Johannes Keukelaar, Karim Oukbir, 2003, Int. J. Geogr. Inf. Sci..

Rough classification and accuracy assessment

Ola Ahlqvist, Johannes Keukelaar, Karim Oukbir, 2000, Int. J. Geogr. Inf. Sci..

A visual programming language for the analysis of uncertain spatial data

Johannes Keukelaar, J. Keukelaar, 1999 .

Using Rough Classification to Represent Uncertainty in Spatial Data

Ola Ahlqvist, Johannes Keukelaar, Arim Oukbir, 1998 .