Tsuru Kosuke 
Figure 1 shows the result of plotting according to our method. 
  
  
  
  
  
  
  
  
  
  
  
Fig. 1 data acquisition 
3. . AUTOMATIC COMPILATION 
Automatic compilation composed of line merging, expansion, contraction, connection and code changing are done to the original plotted 
data. 
There are seven patterns of automatic compilation. 1. The merging of lines that are connected already. 2. Merging lines that have not 
been connected yet. 3. The omitting roads crossing without shaves. 4. The omitting roads crossing with shaves. 5. The omitting T- 
figure roads crossing without shaves. 6. The merging of roads and assistant lines without cutting. 7. The merging roads and assistant 
lines with cutting. 
3.1 Merging for Connected Lines 
First process is merging of lines that are connected 
already. Two lines that connected the same 
coordinates merge in a line (fig.2). = 
3.2 Merging for Unconnected Lines 
Second process is merging of lines that have not been connected yet. Edges of two lines are enough to near the distance and cross each 
other, the crossed point of the lines becomes a node and merges in a line (fig.3). Or the crossed point of expansion of two lines becomes a 
node and merges in a line (fig.4). Or the average point of two lines’ edges becomes a node and merge in a line (fig.5). 
a N 
Fig. 2 Merge by crossed point Fig. 3 Merge by expansion point 
x LN 
516 International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B3. Amsterdam 2000.