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[mkgmap-dev] Has anyone added a USA TIMEZONE overlay ontop of their custom maps?

From greg crago gregcrago at gmail.com on Thu Jun 9 01:05:55 BST 2016

Great, how do I use a SHAPEFILE and assign it to a linetype 0x19 (a
TIMEZONE linetype I have waiting)


On Wed, Jun 8, 2016 at 1:42 PM, Bill <bill-mkgmap at halibut.com> wrote:

> 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
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