ISPRS, Vol.34, Part 2W2, “Dynamic and Multi-Dimensional GIS”, Bangkok, May 23-25, 2001 
237 
D-GIS 
p a prototype of 
et Management 
o develope and 
data model, to 
access) and to 
nd 4D analysis 
, geometric and 
): First, we can 
o a large extent 
;r different tools 
the data access 
- GIS. Therefore 
ie possibilities 
ghly depend on 
; of a relational 
he one hand to 
I the other hand 
separate tables, 
nation only (its 
and metric for a 
e reduction of 
need to save a 
explicitly. The 
with relations 
itaining metrical 
eometry-related 
ealization of the 
relational data 
dissolving the 
veen points and 
nber of one or 
several points. 
Therefore we need a dissolving table for saving the relations 
between points and edges. Furthermore we store in a kind of 
winged-edge data structure preceding and succeeding points. 
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