Object Owner Landuse Area Tax Ts Te 
ID (km) Receipts 
1001 Mao,C. Farm 4320 1110 1949 1977 
1002 Chen, P. Farm 2020 700 1978 1983 
1003 Wang,H. Vegetable 2300 1200 1978 1983 
1004 Chen, P. Vegetable 1200 700 1984 1992 
1005 i Yang, M Residence 820 1300 1984 1990 
1005 Yang, M Recreation 820 1600 1991 
1006 Li, H. Residence 1500 2250 1984 1992 
1007 Tang, Y Residence 800 1200 1984 1990 
1007 Li, T.Y. Residence 800 1200 1991 F1 
1008 LH. Residence 2700 4000 1993 zi 
  
  
  
  
  
Ts : starting time, Te : ending time , 
: still active and has no ending time 
Table 1: Temporal parcel objects in the process of land subdivision 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Edge Left P Right P Ts Te Edge Left P Right P Ts Te 
1 0 1001 1949 1977 11 0 1005 1984 
2 0 1001 1949 1977 12 1004 1006 1984 1991 
0 1002 1978 1983 13 1004 1005 1984 1991 
3 1001 0 1949 1977 1008 1005 1992 
4 1001 0 1949 1977 14 1005 1007 1984 1991 
1003 0 1978 1983 1005 1009 1992 
5 0 1002 1978 1983 15 1006 0 1984 1991 
0 1004 1984 1991 1008 0 1992 = 
6 0 1003 1978 1983 16 1006 1007 1984 1991 
0 1006 1984 = 1008 1007 1992 A 
7 1002 0 1978 1983 17 1007 0 1984 
1005 0 1984 = 18 0 1008 1992 
8 1003 0 1978 1983 19 1009 0 1992 x 
1007 0 1984 " 20 1010 0 1992 7 
9 1002 1003 1978 1983 21 1008 1010 1992 ? 
10 0 1004 1984 1991 22 1008 1009 1992 = 
0 1008 1992 
  
  
  
  
  
  
Explanation: 
0 : the outside polygon; 
Left P: left polygon of the edge; 
all horizontal lines' direction are up n 
- 1 still active and has no ending time; 
Right P: right polygon of the edge; 
and all vertical lines' direction are right 2; 
Table 2. Changed spatial contiguity of temporal parcel polygons 
It is evident that representing the above temporal 
parcel objects requires alteration of the spatial 
topology stored in the space-time composite. After 
adjusting or subdividing lot lines, new geometry for 
parcel boundaries would be formed and the 
topological elements of some parcel polygons would 
also be updated. The changed spatial contiguity of 
each parcel polygons is shown in Table 2. On one 
hand, each edge is used to make up two parcel 
polygons for a specific time interval, but it might be 
52 
used in the sequential time period of its lifespan to 
make up different temporal parcel polygons. For 
instance, edge 5 was to make up P1002 and P1004 
from 1978 to 1991 and from 1992 to Tnow 
respectively. On the other hand, the edges of a given 
temporal parcel polygon might be changed during its 
lifespan. For example, P1008 is made up of edges 10, 
13, 16, 15, 18. If P1007 is splited into P1009 and 
P1010 as shown below in 1992, then P1008 is made 
up by edges 10, 13, 22, 21, 15, 18 from 1992 on. 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B2. Vienna 1996 
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