ISPRS, Vol.34, Part 2W2, “Dynamic and Multi-Dimensional GIS”, Bangkok, May 23-25, 2001 
changes may be accommodation or enlargement. If result 
object is different from any source objects, then changes 
may be merging or generation. 
6) m:n (m,n>2) change, which indicates that m source objects 
produce n result objects in the form. Changes may be 
property inheritance, passing on, permutation, exchange or 
object reallocation. 
Figure 3. Spatial object changes 
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■ ■ ■ 
■ ■ ■ 
■ ■ ■ 
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Regular Distribution 
Figure 4. Primary spatial scene changes