As {HEAD ~ a result} of {TAIL ~ the step} S812, if the previous node of the current node is not the old version, the car navigation apparatus determines a matching one of connection links of the previous node and the current node as a path link and reconstructs a link  
As { HEAD ~ a result } of { TAIL ~ the step } S812 , if the previous node of the current node is not the old version , the car navigation apparatus determines a matching one of connection links of the previous node and the current node as a path link and reconstructs a link
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH