International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B2. Istanbul 2004 Intei 
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merge ObjectSet, IF Ojp# Of { for V Ojp (1<i<n) } THEN Bas 
10 O0 ...-Om! IF OS;p#OS, { for V Ojp (1<i<n) | THEN O1p.Oop .... Opp merge into Oa taxo 
ObjectSet, ={0,} The 
identify ObjectSet,, IF Ojp# Og { for V Oip (1Si£n) | THEN proc 
7 (Org, Op .... One ) IF there is only one Ojp (1$1$n) OSjp=OS, THEN O1h.02b … Onb identify to Oy, So » 
ObjectSet, ={0,} data 
char 
kno 
5. AN EXAMPLE rule: 
Befc 
In section 4 we give the taxonomy of spatio-temporal changes char 
impact on geographical objects. The data/knowledge packets Obj 
explicitly describe the people’s cognitive process of the change. | com 
Here is a scenario of real world change(Figure 5). From time T1 | B 
to T4 the parcels have a sequences of changes. By the method | pat 
proposed in this paper, we describe the changes impact on land | self 
parcels by a formalized way. | The 
cogr 
T4 Figure | a scenario of land parcel change The 
Table 4 Tlto T2: O, deformed; O. Mutated; O; fission into only 
Os: > : 
S obje 
Type of objects rules sons 
change imp: 
deform ObjectSet, ={ O1} 0,#041 AND OS,= OS" AND OG,#OG' AND AREA(OG char 
ObjectSet, ={ O1 } )=AREA(OG' ) 
Mutate ObjectSet, ={ Os} 0,706 AND OS FOS, 
ObjectSet, ={ Og} 
fission ObjectSet, ={ Os} OS;#OS 5; AND OS;2OS;; This 
ObjectSet, ={ Os;,05,) unde 
The example indicates that the method proposed in this paper can 6. CONCLUSION AND FUTURE WORKS | 
save steps judging a change and give clear expressions. For | Ave 
; ; i : If we want to publish and transfer incremental data about the Ave 
instance, the semantic component of O2 changed, according to Kno 
; 3l E master topology database (producer's database) to users, firstly no 
this, we can affirm O2 mutated. We are unnecessary to compare 3 S NI 
: : we should get incremental data by comparing the two versions ol SN. 
the other components of the object. Clar. 
the master database. This process is executed based on the types an 
In order to collect this change, we need to execute some database Eve 
à 5 ; i of spatio-temporal changes. Therefore, Classification and ver 
operations. For this scenario, some operations need execute: à | Dat: 
dues Dp ; : representation of spatio-temporal changes is the precondition. ata 
UPDATE tableN SET spatailField=... Where ObjectID = O1 : | Spr; 
ue Sue s LU ES Based on the object-oriented idea, we give taxonomy ol | Spr 
DELETE FROM tableN WHERE ObjectID = O2 Clar. 
; = spatio-temporal changes. How to represent the geographical gam 
INSERT INTO tableN VALUES(OG ,...... ) Mod 
REDE d object is the premise for analyzing the classification of changes. 9 
DELETE FROM tableN WHERE Objectl D = O5 GIS 
te ; ; 5 In this research, we regard the geographical object as a 4-tuple He 
INSERT INTO tableN VALUES(O 51 ,...... ) | Neth 
DINE ; SLE {semantic descriptor, temporal descriptor, themantic descriptor, 
INSERT INTO tableN VALUES(O 52 ....... ) : 
and spatial descriptor}. Spatial descriptor contains three parts, 1.€. 
Shape and Size, Position and orientation and Topology relation. 
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