[OHM] Open Historical map

[Jeff Meyer]

Semi-piling on here, but there are limits to the current 8601 standard,
which I believe is due for an update in the near future.

Please see info here about the Extended Date Time Format:
http://www.loc.gov/standards/datetime/
https://mapzen.com/blog/tackling-space-and-time-in-whosonfirst/

I'm not really sure why ISO shut down the LoC's discussion of EDTF, but I'm
hopeful we'll be supporting whatever standards emerge, as there's clear
need for improvement.



On Mon, May 7, 2018 at 3:42 AM, SK53 <sk53.osm at gmail.com> wrote:

> Karl Grossner has certainly done at least one thing (Topotime
> <http://dh.stanford.edu/topotime/about.html#about>) along these lines.
>
> My own views were summarised ages ago in my blog post
> <http://sk53-osm.blogspot.co.uk/2013/08/history-workshop-at-sotmbaltics.html>
> about Susanna's workshop at SotM-Baltics: i.e. multiple types of start and
> end dates expressing different degrees of certainty, ranges are a slightly
> different syntactic way of presenting this (one tag not two). Note that
> individual dates are likely to be fuzzy too (Tudor, in the reign of Queen
> Elizabeth, inter-war, 1970s, 1970, May 1971 etc) and it may be desirable to
> represent the fuzziness in documentary sources explicitly. One of the
> things I've noticed when even adding fairly small things to OHM is that to
> be really useful to others one really needs to store useful metadata about
> sources.
>
> Jerry
>
> On 6 May 2018 at 23:57, Dan Vanderkam <danvdk at gmail.com> wrote:
>
>> As an FYI, ISO-8601 does specify a standard format for date and time
>> intervals. It uses a forward slash and allows some shorthands:
>> - 1980-07-01/1983-05-01
>> - 1980-07-01/07 (same as 1980-07-01/1980-07-07)
>>
>> Not the prettiest, but it is a standard.
>> https://en.wikipedia.org/wiki/ISO_8601#Time_intervals
>>
>> On Sun, May 6, 2018 at 3:28 PM, Tim Waters <chippy2005 at gmail.com> wrote:
>>
>>> https://wiki.openstreetmap.org/wiki/Key:start_date#Approximations
>>>
>>> gives a number of such approximations with
>>>
>>> 1980-07-01..1983-05-01 as a suggested value.
>>>
>>> I seem to recall coming across a kind of bibliographic standard of all
>>> the ways that dates can be encoded to capture fuzzyness, if I come across
>>> it I'll add the info the page
>>>
>>> Tim
>>>
>>> On 6 May 2018 at 11:19, PauLL170 <bilbo.beuthel at gmail.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> i'm already mapping Germersheim and a bit of Trier :) . Regarding
>>>> start_date and end_date I was talking about the following: E. g. if you
>>>> have a photo from 1983-05-01 with a certain building and one from
>>>> 1980-07-01 without it, you can set as start_date 1980-07-01..1983-05-01. In
>>>> my opinion it is important that the time slider recognizes this form,
>>>> because it is often the case. Generally, we will have to think about how to
>>>> render this object in this period, in which the building possibly already
>>>> have existed. But for now, I just want to suggest that the time slider
>>>> recognizes this form in general, as far as it is doable. As a first version
>>>> I imagine a check box: "show doubtful objects". If it is activiated, the
>>>> "start_date" technically is set 1980-07-01 and if not, it is set 1983-05-01.
>>>>
>>>> Best regards
>>>> Paul
>>>>
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-- 
Jeff Meyer
206-676-2347
osm: Open Historical Map (OHM)
<http://wiki.openstreetmap.org/wiki/Open_Historical_Map> / my OSM user page
<http://www.openstreetmap.org/user/jeffmeyer>
t: @OpenHistMap
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