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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have a question related to the accepted standard for
expressing the “Olsen” name where multiple zones exhibit the same “behaviour”
in terms of belonging to the same country, having the same UTC offset and exactly
the same DST rules.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>For example, it appears that all clocks within all locations
within <st1:country-region w:st="on"><st1:place w:st="on">Argentina</st1:place></st1:country-region>
will have the same time all year round. The 12 zones reveal the same behaviour.
The same is true of <st1:country-region w:st="on"><st1:place w:st="on">China</st1:place></st1:country-region>
and a number of other countries.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have been aware of the concept of a “consolidated”
or “preferred” time zone which is a combined zone that takes the
name of the most important location (eg. “America/Buenos_Aires” in
the case of <st1:place w:st="on"><st1:country-region w:st="on">Argentina</st1:country-region></st1:place>)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Do these combined “super” zones exist? If so, is
there information available that indicates how the individual zones roll up?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><i><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-style:italic'>My enquiry relates to a need to provide information
that can identify the correct timezone for every place (city, postcode, county,
state, etc etc) on earth via a back-end mapping service that calculates the
spatial relationship between the place coordinate and the timezone boundary.<o:p></o:p></span></font></i></p>
<p class=MsoNormal><i><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-style:italic'>I am looking to build up an accurate
timezone boundary map essentially using existing map objects as building blocks.</span></font></i><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Many thanks<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>-<st1:PersonName w:st="on">Martin Barnes</st1:PersonName><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>______________________<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>GeoData Manager<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Yahoo! Geo Technologies<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Geo Informatics team<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>London</span></font></st1:place></st1:City><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
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