Street-Level Landmark Evaluation Based on Nearest Routers

Table 3

The number of landmarks.

City	Before location verification	After location verification	After evaluation (TH=3)	After evaluation (TH=5)
Beijing	4658	1072	392	456
Shanghai	8966	3289	1227	1341
Shenzhen	6605	1857	783	869
Xiamen	3702	864	236	301