A. Areas with the signal strength equal to -68 dB are zoomed in to provide better visibility
B. Areas with the signal strength weaker than -68 dB are cut out of the map
C. Areas with the signal strength weaker than -68 dB are highlighted in orange and red to indicate that no signal was propagated by the APs.
D. Areas with the signal strength equal or stronger than -68 dB are highlighted in multicolor