view doc/docbook/GuideReferenceUTC.xml @ 2746:8bab8ac8ade0

Local time - UTC offset and daylight saving correction Use GPS lat/long to provide local time corrected for UTC offset and DST correction. The corrected time is available in formatted.localtime The selected timezone is available in formatted.timezone
author Colin Clark <colin.clark@cclark.uk>
date Wed, 25 Apr 2018 11:46:38 +0100
parents
children
line wrap: on
line source

<?xml version="1.0" encoding="utf-8"?>
<section id="GuideReferenceUTC">
  <title id="titleGuideReferenceUTC">UTC and Daylight Saving Time (DST)</title>
  <para>Geeqie can display the local time at which a photo was taken, adjusted for UTC offset and Daylight Saving Time.</para>
  <para>
    If the image exif data contains the required parameters (see
    <link linkend="GuideReferenceXmpExif">Pre-formatted tags</link>
    ), Geeqie will use the latitude and longitude to determine which timezone the image was taken in.
    <para />
    The UTC offset and Daylight Saving Time Correction for that timezone, combined with the GPS UTC value, will then be used to compute the correct local time.
    <para />
    This value may be displayed in either the Info Sidebar or Overlay Screen Display by using the parameter
    <code>formatted.localtime</code>
  </para>
  <para>
    The timezone for the image may also be displayed by using the parameter
    <code>formatted.timezone</code>
    .
  </para>
</section>