How a false signal moves the blue dot
A phone does not locate itself by asking a map app where it is. Its satellite-navigation receiver listens for timed signals from satellites and uses tiny differences in their arrival times to calculate a position. The signals are faint by the time they reach the ground, so a nearby transmitter can sometimes overpower them.
In spoofing, that transmitter sends a counterfeit navigation signal that looks plausible to the receiver but implies a different location. If the receiver accepts it, the phone may calculate the wrong coordinates, and the map app will faithfully display those coordinates. The app may show a sudden jump or place the user somewhere far away even though the phone has not moved.
Why the effect can appear in a capital
Governments may use interference around sensitive sites to complicate navigation for hostile drones. It is not the same as jamming: jamming floods the receiver with noise so it cannot get a usable signal, while spoofing tries to lead it to a false position. The effects can extend beyond the intended target because radio signals do not stop neatly at a security boundary.
A map is only as trustworthy as the location data it receives. When the blue dot leaps unexpectedly, the displayed place may reflect a manipulated signal rather than the street beneath the traveler—one reason a paper sign, local landmarks, or another navigation method can matter near a restricted area.
