Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-07 Thread Kevin Kenny
On Tue, Mar 7, 2017 at 1:43 AM, Frederik Ramm wrote: > On 03/07/2017 02:06 AM, Kevin Kenny wrote: > > There are reasonable use cases for wanting to take a timezone name and > > get back a multipolygon > > Question is, does (the core database of) OSM have to fulfil these use

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-07 Thread Martin Koppenhoefer
2017-03-07 12:42 GMT+01:00 Jaroslav Kameník : > Personally I would compromise - leave timezone relations > where really needed (river/meridian/territorial waters/...) and change them > to tagged A.B. otherwise. > > +1 Cheers, Martin

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-07 Thread Andrew Hain
March 2017 10:38:01 To: Tag discussion, strategy and related tools Subject: Re: [Tagging] Mapping time zones as geometries (relations) Hi, * Colin Smale <colin.sm...@xs4all.nl> [170307 09:04]: > [..] > It is possible to have enclaves/exclaves for a territory which differs > from the

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-07 Thread Jaroslav Kameník
Hi all, this discussion has started because of me, so I would like to add few comments:). Should OSM contains timezone data? I think so. Some said, we should use other sources and overlay them over OSM, but there is no direct mapping except description in human languages, not too usable for

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-07 Thread Andy Mabbett
On 6 March 2017 at 00:30, Frederik Ramm wrote: > you could easily build time zone > geometries by either (a) keeping an external database that says "Time > Zone X consists of the following administrative units" and then > collecting the units from OSM That database is

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-07 Thread Wolfgang Zenker
Hi, * Colin Smale [170307 09:04]: > [..] > It is possible to have enclaves/exclaves for a territory which differs > from the surrounding territory. Taking the US as an example, if we put a > timezone tag on a State, there may need to be an overriding tag on a > County or

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-07 Thread Colin Smale
On 2017-03-07 07:43, Frederik Ramm wrote: > Kevin, > > On 03/07/2017 02:06 AM, Kevin Kenny wrote: > >> There are reasonable use cases for wanting to take a timezone name and >> get back a multipolygon > > Question is, does (the core database of) OSM have to fulfil these use cases! > >> or to

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-06 Thread Frederik Ramm
Kevin, On 03/07/2017 02:06 AM, Kevin Kenny wrote: > There are reasonable use cases for wanting to take a timezone name and > get back a multipolygon Question is, does (the core database of) OSM have to fulfil these use cases! > or to get a list of name and multipolygon for > all the timezones

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-06 Thread wille
I agree with deleting the timezone relations. 2017-03-05 21:30 GMT-03:00 Frederik Ramm : > Hi, > >I would like to start a discussion about the mapping of time zones. > > There are currently 80 relations in OSM tagged as boundary=timezone > using between them over 10,000

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-06 Thread Mike Thompson
On Mon, Mar 6, 2017 at 6:06 PM, Kevin Kenny wrote: > > > It seems that having a 'group' relation for all the administrative regions > that use a given timezone would be useful. The timezone data itself, of > course, belongs separate, but the group relation would, to

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-06 Thread Kevin Kenny
The timezone database does not map the geographic extents of timezones. Rather, it lists them by name and gives the rules for what time they keep. The geography is explicitly out of scope, so the tzdata maintainers really shouldn't have anything to say about OSM mapping time zones! There are

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-06 Thread Aun Johnsen
> > On 3/6/17 11:21 AM, Paul Johnson wrote: >> On Mar 5, 2017 18:30, "Frederik Ramm" > > wrote: >> >>Hi, >> >> I would like to start a discussion about the mapping of time zones. >> >> >>What do you think? >> >> >> I'm

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-06 Thread L. David Baron
On Monday 2017-03-06 14:15 -0500, Richard Welty wrote: > On 3/6/17 11:21 AM, Paul Johnson wrote: > > On Mar 5, 2017 18:30, "Frederik Ramm" > > wrote: > > > > Hi, > > > >I would like to start a discussion about the mapping of time

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-06 Thread Richard Welty
On 3/6/17 11:21 AM, Paul Johnson wrote: > On Mar 5, 2017 18:30, "Frederik Ramm" > wrote: > > Hi, > >I would like to start a discussion about the mapping of time zones. > > > What do you think? > > > I'm generally opposed to mapping

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-06 Thread Colin Smale
On 2017-03-06 17:51, Paul Johnson wrote: > On Mon, Mar 6, 2017 at 10:42 AM, Colin Smale wrote: > > On 2017-03-06 17:21, Paul Johnson wrote: > > On Mar 5, 2017 18:30, "Frederik Ramm" wrote: > Hi, > > I would like to start a discussion about the

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-06 Thread Paul Johnson
On Mon, Mar 6, 2017 at 10:42 AM, Colin Smale wrote: > On 2017-03-06 17:21, Paul Johnson wrote: > > On Mar 5, 2017 18:30, "Frederik Ramm" wrote: > > Hi, > >I would like to start a discussion about the mapping of time zones. > > > > What do you

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-06 Thread Colin Smale
On 2017-03-06 17:21, Paul Johnson wrote: > On Mar 5, 2017 18:30, "Frederik Ramm" wrote: > >> Hi, >> >> I would like to start a discussion about the mapping of time zones. > >> What do you think? > > I'm generally opposed to mapping timezones in OpenStreetMap unless the

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-06 Thread Paul Johnson
On Mar 5, 2017 18:30, "Frederik Ramm" wrote: Hi, I would like to start a discussion about the mapping of time zones. What do you think? I'm generally opposed to mapping timezones in OpenStreetMap unless the tzdata maintainers are 100% on board. Since timezones are a

Re: [Tagging] Mapping time zones as geometries (relations)

2017-03-05 Thread Rafael Avila Coya
I generally agree with your view. The wiki [1] already says: "An effective way to tag timezone information is to add it to administration boundaries of countries or in the case of larger countries smaller administrative boundaries such as states and territories. (Do not create stand-alone

[Tagging] Mapping time zones as geometries (relations)

2017-03-05 Thread Frederik Ramm
Hi, I would like to start a discussion about the mapping of time zones. There are currently 80 relations in OSM tagged as boundary=timezone using between them over 10,000 ways. I think that mapping these time zones as geometries has several issues: 1. It introduces yet another un-observable