I found a shapefile of the timezones of the world:
http://efele.net/maps/tz/world/
On 06/08/2016 03:17 AM, Colin Smale wrote:
According to wikipedia, timezone boundaries seems to be a rather
complex subject in the USA, with some communities using an unofficial
time as well as many variations of the application of Daylight Savings
time... Indiana specifically is described in some detail on wikipedia [1].
I agree with Marko, it would be good to have this in OSM. One way of
doing it would be that the whole state of Indiana gets a "default"
timezone with exceptions on the level of individual counties, but this
would require some processing for the use case of "give the current
UTC offset for this location". I think having a separate system of
boundary relations (type=boundary, boundary=timezone) would be easier
to process. But there will be many, many more than just the well-known
timezones Eastern/Central/Mountain/Pacific/Alaska/Hawaii...
//colin
[1] https://en.wikipedia.org/wiki/Time_in_the_United_States
On 2016-06-08 11:38, Marko Mäkelä wrote:
On Tue, Jun 07, 2016 at 09:36:37PM -0400, greg crago wrote:
I do not know how to add adminstrative boundaries or relations, but it
would be nice if these were added to the USA. INDIANA is divided
between cities and county boarders. I was just hoping someone had
done this and I would like to add this info to my maps.
Indiana http://www.openstreetmap.org/relation/161816 does not have a
timezone=* yet. Maybe someone who is familiar with JOSM and the
timezones could do this? Because I do not live in the US, I am
reluctant to change the data myself. But I guess I could do it if
nobody else steps up, and if you can provide me with a comprehensive
list of states (counties, cities) and timezones.
You see, I would want this data to be present in OSM, to benefit also
other users than those using mkgmap-generated maps. If we have the
data in OSM and if mkgmap starts to interpret it, then you would get
the timezone borders "out of the box". I do not think that timezone
borders would add any significant clutter to the map, so IMO they
should be included in the default style.
Marko
_______________________________________________
mkgmap-dev mailing list
[email protected] <mailto:[email protected]>
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
_______________________________________________
mkgmap-dev mailing list
[email protected]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
_______________________________________________
mkgmap-dev mailing list
[email protected]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
