[GeoJSON] Three threads coming together

[Sean Gillies]

On Tue, Jun 10, 2014 at 8:51 AM, Howard Butler <howard at hobu.co> wrote:

> ...
>
> Finally, is it GeoJSON-LD's scope to be doing for TimeIntervals? Isn't
> temporal modeling larger in scope than Geo? Hasn't this already been done?
> Where's there prior art? Why does it belong in GeoJSON-LD instead of in its
> own thing?
>

Howard,

The prior art for the Instant and Interval concepts in
https://github.com/geojson/geojson-ld/blob/master/time.md come from
http://www.w3.org/TR/owl-time/. It has been done and standardized already.
The only invention that's going on here is how to represent instants and
intervals in GeoJSON.

I'm not excluding well-known concepts of "multi-instants" and
"multi-intervals." They don't exist in the W3C's time ontology and I don't
see their existence elsewhere.

There's been no previous work that shows how to add temporal terms to
GeoJSON and get event-like features that can drive timelines and other
visualizations, and that's what the work summarized in
https://github.com/geojson/geojson-ld/blob/master/time.md aims to do.

Examples of using GeoJSON with temporal terms in timeline software (Simile,
etc) or cross-walking JSON formats like Knight Lab's (
http://storymap.knightlab.com/) over to event-like GeoJSON are a work in
progress. I'm not prepared to call the temporal vocabulary and context done
until that documentation and code is written.

-- 
Sean Gillies
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