Table 3.

Analysis of grid size for Wi-Fi fingerprinting in the optimistic world using 1-NN: Mean positioning error; Maximum positioning Error; Maximum expected error (MEE) and percentage of cases above the MEE.

Grid	Mean Error	Max. Error	Max. Expected Error	% Cases above the MEE
10.0 m	$3.943\pm 0.156$	$6.292\pm 0.080$	$7.071$	$2.003$
5.0 m	$1.975\pm 0.077$	$3.607\pm 0.035$	$3.536$	$1.875$
2.0 m	$0.776\pm 0.030$	$1.600\pm 0.012$	$1.414$	$1.416$
1.0 m	$0.389\pm 0.015$	$0.933\pm 0.009$	$0.707$	$1.367$
0.5 m	$0.194\pm 0.008$	$0.525\pm 0.004$	$0.354$	$1.340$
0.2 m	$0.078\pm 0.003$	$0.227\pm 0.001$	$0.141$	$1.296$
0.1 m	$0.039\pm 0.002$	$0.119\pm 0.000$	$0.071$	$1.279$