The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008 
348 
1: Cru-Node) ; 2: Inner-Node; 3: Isolated-Node 
10: Reference-Node; 20: Interpolated-Node; 
100: Feature-Node. 
2) The other combinations as the basic types’ value added, such 
as, 11 for reference-cru-node, 12 for reference-inner-node and 
111 for reference-feature-cru-node. 
name type description 
Pnt ID Int Point object’s ID(PK) 
Pnt_type char Point object’s type 
„ A . The IDs’sequence of 
Pnt IDSequence Varchar , . 
n nodes(FK,l:n) 
Pnt Attr Varchar Attribute description 
Table 16 Point Object data structure 
5 CONCLUSION 
Arming at these defects of OO-Solid model, the primitives, 
conceptual model and logical model of OO-Solid model is 
redesigned. At last the data structure, that includes all the 
topological relations for it, was designed. The key algorithms 
and key issues of modeling or dynamic updating based on 
OO-Solid model need further in-depth study. 
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