7. REFERENCES 
Beard,K., Buttenfield, B.P., and Clapham, S.B., 
1991 "Visualization of Spatial Data Quality" 
National Centre for Geographic Information and 
Analysis. NCGIA Research Initiative 7. Report of 
the Specialist Meeting Castine, Maine. 
Blakemore, M., 1984 "Generalization and Error in 
Spatial Dtabases" Cartografica, Vol. 21. 
Chrisman, N., 1982 "A Theory of Cartographic Error 
and its Measurement in Digital Databases", 
Proceedings AutoCarto 5 1982. 
Chrisman, N., and McGranaghan, M., 1990 "Accuracy 
of Spatial Databases", Unit 45 in Technical Isuues 
of GIS of the NCGIA Core Curriculum 1990. 
Drummond, J.E., 1991 "Determining and Processing 
Quality Parameters in Geographic Information 
Systems", University of Newcastle upon Tyne, Ph.D. 
Thesis. 
Drummond, J., and Ramlal, B. 1992 "A Prototype 
Uncertainty Subsystem Implemented in ITC’s ILVIS 
PC-BASED GIS, and tested in a Dutch Land 
Reallotment Project", Proceedings EGIS ‘92 Third 
European Conference and Exhibition on Geographical 
Information Systems. 
Genderen, J. van and Lock, B.F. 1977 "Testing 
Landuse Map Accuracy". Photogrammetric Engineering 
and Remote Sensing Vol 43 Nr 9 ppl1135-1137. 
Makarovic, B. 1978 "Digital terrain Models - A 
Constituent of Geo-Information Systems", First 
International Advanced Study Symposium on 
Topological Data Structures for Geographic 
Information Systems, Vol. 5 Data Structures: 
Surficial and Multidimensional. Harvard Papers on 
Geographic Information Systems (ed Dutton), 
Harvard University, 1978 
Guptill, S., 1989 "Inclusion of accuracy data in a 
feature based, object-oriented data model" in 
"Accuracy of Spatial Databases" (ed Goodchild and 
Gopal) Taylor and Francis, London. 
Hord, R.M. and Brooner, W. 1976 "Landuse Map 
Accuracy Criteria" Photogrammetric Engineering and 
Remote Sensing Vol 42 Nr 5. 
Kaufmann, A. 1975 "Introduction to the Theory of 
Fuzzy Subsets" Academic Press Ltd., London. 
Marsman, B.A. and de Gruijter,J.J. 1986 "Quality 
of Soil Maps. A Comparison of Survey Methods in a 
Sandy Area. Soil Survey papers nr 15. Netherlands 
Soil Survey Institute, Wageningen. 
Openshaw, S., Charlton, M. and Carver, S. 1991 
"Error Propagation: a Monte Carlo Simulation" in 
Handling Geographical Information (ed Masser and 
Blakemore) Longman, Harlow. 
362 
Ramlal, B. 1991 "Communicating Information Quality 
in a Geographic Information System Environment" 
International Institute for Aerospace Survey and 
Earth Sciences (ITC), The Netherlands. M.Sc. 
Thesis. 
Van Elzakker, C., Ramlal, 
1992 "The Visualisation of GIS Generated 
Information Quality", ISPRS Congress XXVII, 
Commission IV, Washington DC. 
B., and Drummond, J., 
Veregin, H. 1989 "A taxonomy of Error in Spatial 
Databases" Technical paper 89-12, NCGIA. Dept. 
Surveying Engineering. University of Maine. 
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