[OHM] tagging unit movements

[Gregory]

I would think that the typical map features (fields, terrain, borders etc)
should be in a historic map data set to create the base map for the
appropriate date.

For unit movements, I would think this would be a sort of specific data set
to overlay on top. Maybe stored in a database, but you could just have it
coded in an array or xml file if you only did it on a single battle basis.
Something like the GeoCommons maps with a time slider to move markers
springs to mind.
I found this example: http://geocommons.com/maps/137243

Greg.


On 15 April 2013 15:28, Richard Welty <rwelty at averillpark.net> wrote:

> On 4/15/13 9:27 AM, Rob Warren wrote:
>
>> Richard,
>>
>> The way I see it, we have two solutions:
>>
>> a) Abuse the GPS trace storage of the base OSM database to store the
>> movements and modify the  renderers to read them.
>> b) Implement movement through the use of multiple ways / relations, one
>> for each time stamped movement.
>>
>> I'm tempted to use b) for troops movements and b) for "born digital"
>> material like AIS / GPS / radar tracks.
>>
>> Are you planning to encode units as 'fronts' or as point data with
>> nato-style unit icons?
>>
> i'm thinking b as well.
>
> i was planning to use nodes where the deployment was
> unavailable/uninteresting
> (e.g., a company marching down a road), but ways where the information is
> interesting
> (e.g., which way a unit was facing in combat, and whether the unit was in
> line or
> column at the time, or perhaps the path of a march or retreat.)
>
> there are potentially two scenarios for using relations:
>
> 1) showing movement of a given unit over time
> 2) showing groupings of units into higher level units
>
> richard
>
>
>
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-- 
Gregory
osm at livingwithdragons.com
http://www.livingwithdragons.com
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