Selected references
Kuhn Werner, Handling Data Spatially: Spatializating User Interfaces, Spatial Data Handling Î96 Conference.
Skupin Andre and B. Buttenfield, Spatial Metaphors for Visualizing Information Spaces, 1997 ACSM / ASPRS Annual Convention and Exposition, Technical Papers Volume 5: Auto-Carto 13, pp. 116-125, Seattle, WA., American Society for Photogrammetry and Remote Sensing and American Congress on Surveying and Mapping, April, 1997.