Location of interest altitude and determining calibration points

A method comprising:

• on a mobile device having one or more processors to execute instructions associated with an operating system on the mobile device:
• determining a baseline barometric pressure in response to at least one detected calibration signal, the at least one detected calibration signal associated with an event that is indicative of a probability that the mobile device is outdoors and at ground level;
• determining, by a location subsystem of the operating system, first geographic coordinates for a first location;
• determining, via the location subsystem, an altitude estimate for the first location;
• determining, via the location subsystem, second geographic coordinates for a second location;
• determining, via the location subsystem, an altitude estimate for the second location, wherein to determine the altitude estimate for the first location and the second location comprises a comparison of a barometric pressure at a location with the baseline barometric pressure;
• disambiguating the first location from the second location based on altitude estimates for the first location and the second location in response to an observed location history of the first location and the second location;
• and
• storing the first location and the second location as separate locations within a location database of the location subsystem, the location database stored in the one or more memory devices.

A non-transitory machine-readable medium storing instructions to cause one or more processors of an electronic device to perform operations comprising:

• determining a baseline barometric pressure in response to at least one detected calibration signal, the at least one detected calibration signal associated with an event that is indicative of a probability that the electronic device is outdoors and at ground level;
• determining, by a location subsystem of the operating system, geographic coordinates for a first location;
• determining, via the location subsystem, an altitude estimate for the first location;
• determining, via the location subsystem, geographic coordinates for a second location;
• determining, via the location subsystem, an altitude estimate for the second location, wherein to determine the altitude estimate for the first location and the second location comprises a comparison of a barometric pressure at a location with the baseline barometric pressure;
• disambiguating the first location from the second location based on altitude estimates for the first location and the second location in response to an observed location history of the first location and the second location;
• and
• storing the first location and the second location as separate locations within a location database of the location subsystem, the location database stored in the one or more memory devices.