Sensor-assisted location fix

A method of determining location using GPS data with sensor data, the method comprising:

• obtaining, with a computing device, a first set of global position satellite signals and calculating a first location fix at a first time;
• measuring one or more sensor values from sensors of the mobile device, the one or more sensor values including an acceleration;
• calculating a distance traveled from the first location fix using the one or more sensor values;
• combining the distance traveled with the first location fix to obtain a second location fix at a second time;
• obtaining, with the computing device, a second set of global position satellite signals and calculating a third location fix at approximately the second time;
• determining a difference between the second location fix and the third location fix;
• and
• comparing the difference to a threshold error.

A method of determining location, the method comprising:

• determining, with a computing device, a location of the computing device using a first location technology mode;
• detecting a status change with one or more sensors;
• and
• responsive to detecting the status change, determining the location of the computing device using a second location technology mode.

A method of crowd-sourcing location data, the method comprising:

• receiving, at a server, a plurality of untrusted location records from a plurality of mobile devices, wherein the plurality of untrusted location records each comprises location data representative of a location determined to have untrusted location data;
• analyzing, by the server, the plurality of untrusted location records to:
• determine whether a particular location has a statistically significant number of untrusted location data;
• and
• mark the particular area as an untrusted area if the particular location has a statistically significant number of untrusted location data.