[OHM] Representing the Change in Tag Values over Time

[Richard Welty]

On 4/3/17 4:45 PM, PauLL170 . wrote:
> Hi JDruhanC,
>
> see: http://wiki.openstreetmap.org/wiki/Proposed_features/Date_namespace.
>
> For example:
> highway=track
> highway:1900--1950-07=path
> highway:1950-07--1985=track
> start_date=1900
> end_date=1985
>
> It gets complicated (according to rendering a certain date) when the
> dates of "path" and "track" overlap due to unknowingness etc. - how do
> we render that? But in general I think this is a legit method.
i've never liked strategies like this that pollute key space (the left side
of the = signs). it can make search strategies really, really expensive.

richard

-- 
rwelty at averillpark.net
 Averill Park Networking - GIS & IT Consulting
 OpenStreetMap - PostgreSQL - Linux
 Java - Web Applications - Search


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