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 <[email protected]> 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 > > > > ______________________________**_________________ > Historic mailing list > [email protected] > http://lists.openstreetmap.**org/listinfo/historic<http://lists.openstreetmap.org/listinfo/historic> > -- Gregory [email protected] http://www.livingwithdragons.com
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