[OHM] temporal data in the OHM sandbox

[Mikel Maron]

Without thinking about it much, there's a few options

* associate 1 or mode nodes centered on the building via a relation. tag each node with use and time span.
* time namespacing, ala language localization http://wiki.openstreetmap.org/wiki/Comparison_of_life_cycle_concepts#Related_concepts


* Mikel Maron * +14152835207 @mikel s:mikelmaron


>________________________________
> From: Rob Warren <warren at muninn-project.org>
>To: historic at openstreetmap.org 
>Sent: Sunday, May 19, 2013 7:11 PM
>Subject: Re: [OHM] temporal data in the OHM sandbox
> 
>
>Erik,
>
>Yes, the life cycle would mean the repetition of ways, through we can  
>probably get away with recycling the nodes. It's not ideal, but it's  
>pretty much the only way to get things to record change properly given  
>the data structure we have to work with.
>
>My thinking so far is that more encoding is better than less.
>
>
>
>On 17-May-13, at 8:00 AM, historic-request at openstreetmap.org wrote:
>
>> Message: 4
>> Date: Thu, 16 May 2013 18:02:38 +0200
>> From: Erik Johansson <erjohan at gmail.com>
>> To: Robert Warren <warren at muninn-project.org>
>> Cc: "historic at openstreetmap.org" <historic at openstreetmap.org>
>> Subject: Re: [OHM] temporal data in the OHM sandbox
>> Message-ID:
>>     <CAKs=k7qrD+ic3cMQH_np9FCxJYU8-SDg-WR2sq9zk61gCUQ37g at mail.gmail.com>
>> Content-Type: text/plain; charset=ISO-8859-1
>>
>> I don't know if you use life_cycle=* wouldn't that mean you have to
>> create a new building every time you want to change the buildings
>> use. That would mean a need to track things like "this is way #####2
>> the same building as in the deleted way #####1"
>>
>> The suggestion further down on that page seems to be more like what
>> I'm about to do.
>> http://wiki.openstreetmap.org/wiki/Comparison_of_life_cycle_concepts#Related_concepts
>>
>>
>>
>> On Thu, May 16, 2013 at 4:41 PM, Robert Warren
>> <warren at muninn-project.org> wrote:
>>> Erik,
>>>
>>> I've been using the start and end dates as well. I would prefer we  
>>> use something like life_cycle [1] for structure status since this  
>>> will better track what structure is in what state. Today's ruins  
>>> are yesterday's town hall.
>>>
>>> Rendering is something we still need to work on. Suggest more  
>>> tagging data is better than less tagging data - it's easier to  
>>> delete superfluous data later rather than re-creating it.
>>>
>>> rhw
>>>
>>>
>>> [1] http://wiki.openstreetmap.org/wiki/Comparison_of_life_cycle_concepts#life_cycle_.3D_.3Cstatus.3E
>>>
>>>
>>> On 2013-05-16, at 8:00 AM, historic-request at openstreetmap.org wrote:
>>>
>>>>
>>>> Message: 3
>>>> Date: Wed, 15 May 2013 23:55:57 +0200
>>>> From: Erik Johansson <erjohan at gmail.com>
>>>> To: Marcus Koenig <einschmelzer at hotmail.com>
>>>> Cc: "historic at openstreetmap.org" <historic at openstreetmap.org>
>>>> Subject: Re: [OHM] temporal data in the OHM sandbox
>>>> Message-ID:
>>>>      <CAKs=k7q9Zvx8A9d1kY6MBoq+xy2gRDFphq9MqB9VRfNpkjnQHg at mail.gmail.com 
>>>> >
>>>> Content-Type: text/plain; charset=ISO-8859-1
>>>>
>>>> Hi Marcus.
>>>>
>>>> I don't know how other people use it, and I've not uploaded my data
>>>> because of many small problems with historic mapping. But I have a
>>>> handfull of historic buildings in Stockholm that I will upload
>>>> sometime in the future.
>>>>
>>>> For the buildings I use
>>>> start_date=1790
>>>> end_date=1810
>>>>
>>>> http://wiki.openstreetmap.org/wiki/Key:start_date
>>>>
>>>> I also use free form tagging, these need to be more formal.
>>>> note="just gone from map"
>>>> note="demolished"
>>>> note="burned down"
>>>>
>>>> I do not map changes to the buildings, e.g.
>>>> * reconstructions and additions.
>>>> * church => night club
>>>> * relocations
>>>>
>>>> I've tried to map name changes, But it's clunky.
>>>> name:1790="Fr?mans krog"
>>>>
>>>> I find it hard to verify facts, I should have added source on every
>>>> feature I mapped, I've tried source=, but these tags are sometimes  
>>>> out
>>>> of sync with the data.
>>>> source="map xx from 1624"
>>>> source:url=*
>>>>
>>>> It will probably take a while before I upload/share my meager data
>>>> collection, mostly because of it being hard work with all sources,
>>>> projections and unexplained peculiarities.
>>>>
>>>> I have no renderers for the data yet, except some manual one year
>>>> snapshot with either JOSM or postgres + openlayers.
>>>>
>>>> On Wed, May 15, 2013 at 6:50 PM, Marcus Koenig <einschmelzer at hotmail.com 
>>>> > wrote:
>>>>> Hi,
>>>>>
>>>>> I'm very interested in the OHM project and I would like to  
>>>>> contribute data
>>>>> for Mainz, Germany. In the long run I would like to create a map  
>>>>> of the city
>>>>> before the destructions during WW2, but also of earlier periods.  
>>>>> I have had
>>>>> a look at the OHM Sandbox, but I couldn't find out where the time  
>>>>> dimension
>>>>> comes in. How do you tag and display temporal information? The  
>>>>> map would
>>>>> have to change with time settings - eventually? I'd really  
>>>>> appreciate if
>>>>> anyone could give me a short insight into the current state of  
>>>>> the project.
>>>>>
>>>>> Best regards
>>>>>
>>>>> Marcus K?nig
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Historic mailing list
>>>>> Historic at openstreetmap.org
>>>>> http://lists.openstreetmap.org/listinfo/historic
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> /emj
>>>
>>
>>
>>
>> -- 
>> /emj
>>
>
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