Geographic Information Systems, Vol. 9, No. 5, pp. 489-
507.
[18] Vijlbrief, T., and van Oosterom, P., 1992. The
GEO++ System: an extensible GIS. Proc. of the 5th Int.
Symp. on Spatial Data Handling, pp. 40-50.
[19] Zhang, W., Brooke, G., and Kubik, K., 1993.
Knowledge representation approach to cartographic
conceptual model formalization. Proc. of 16th Int.
Cartogr. Conf. Cologne / Koln, ICA, pp. 1137-1149.
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International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996