[OHM] Open Historical map

[SK53]

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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>>>
>>>
>>
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