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Decoding Google Maps Timestamp

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    Decoding Google Maps Timestamp

    I have a PhoneGap app that uses the Action Javascript GeoLocation Functions to capture data, including the timestamp that Google Maps provides.

    I am saving the data to a MySQL table.

    I want to display the data in a list control, and from there show markers on a map.

    This is working fine for the latitude and longitude. But I am having trouble with the timestamp.

    Here are some samples of the timestamps I am receiving from an iPhone SE:

    1513123169010.2131
    1513167614524.0479
    1513176386688.052

    What are the decimal and extra numbers?

    In Live Preview running in Mozilla it returns 13 digits, such as

    1513123169010
    1513167614524
    1513176386688

    I can use unixtimestamp_to_time() to convert 10 digits to a readable format. That is as far as I have gone.

    How can I convert these to a format such as MM-dd-yyyy&&0h:0m AM?

    And my next step will be the speed data.

    #2
    Re: Decoding Google Maps Timestamp

    The extra digits are just being extremely precise... down to milliseconds... and beyond.

    1513176386688.052 will give you Wednesday, December 13, 2017 9:46:26.688 AM GMT-05:00 using online epoch time converters.


    Even though you're getting more than 10 digits to use... there are limits to unixtimestamp_to_time().

    1513176386688 will result in no return from unixtimestamp_to_time().

    Trimming this down to 10 digits will return today's date.

    You'll see from the Alpha doc that you should use a Time format for the results...

    Code:
    dim myTime as t
    myTime = unixtimestamp_to_time(1513176386)
    will give you 12/13/2017 09:46:25 00 am
    Last edited by Davidk; 12-13-2017, 02:37 PM.

    Comment


      #3
      Re: Decoding Google Maps Timestamp

      OK. I was not sure what I was loosing by trimming it down to 10 digits. I now know about www.epochconverter.com.

      I am not quite clear on how the time zone offset is handled. I assume the timestamp will always return the time as it would be in the device's location.

      As I understand it, if I am in Central time, and it is Noon, and a device in Mountain time (11:00 AM) records a timestamp, it will decode as 11:00 AM. Is that correct?

      And if so, I probably need to capture the device's time zone as well.

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