[tz] Timezone boundaries (Was: Re: [PATCH 4/4] yellow flags)

Lester Caine lester at lsces.co.uk
Thu Aug 15 13:28:57 UTC 2013

Derick Rethans wrote:
>> >Derick Rethans wrote:
>>> > >In the meanwhile, have a look at this
>>> > >(pretty) map showing all the timezones:
>>> > >http://maps.derickrethans.nl/?l=timezones&lat=50&lon=20&zoom=3   (Built
>>> > >with Eric Muller's shapefiles fromhttp://www.efele.net/maps/tz/world/)
>> >
>> >Nice use of OSM ... Next step would be a nice link to data on a
>> >timezone;)  I've been looking into that for another couple of jobs,
>> >but it's well down the todo list.
> I do have that too, I'm just still fixing up the demo online a little to
> add more information:
> http://maps.derickrethans.nl/?l=timezones,timezone&lat=38.60&lon=-86.90&zoom=8
> Would you like to see anything added there?

The 'wish list' from my end is to have a selectable overlay on OSM which gives 
historic information. So click on a timezone and go to a page which details the 
calendar back through time so we can cross check genealogical data. I've got a 
crude database driven site but it needs a lot more work on the calendar 
variations. At some point, clicking on the TZID on your pop-up would link to 
that type of data. More of a problem is mapping changes in boundaries ... not a 
lot have changed since daylight saving was introduced, but it's something that 
the historic OSM should be able to handle.

Lester Caine - G8HFL
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