Enhanced crowd-sourcing navigation

A non-transitory computer-readable medium storing computer-executable instructions which when executed by one or more processors result in performing operations comprising:

• identifying user information received from the device, the user information corresponding to a trajectory of the device as determined by a navigation system of the device;
• identifying external information corresponding to the trajectory of the device, as determined by a wireless network;
• determining navigation system error by comparing the user information to the external information;
• and
• causing to send information associated with the navigation system error to a server.

A method comprising:

• identifying, by one or more processors user information received from the device, the user information corresponding to a trajectory of the device as determined by a navigation system of the device;
• identifying external information corresponding to the trajectory of the device, as determined by a wireless network;
• determining navigation system error by comparing the user information to the external information;
• and
• causing to send information associated with the navigation system error to a server.