[GeoJSON] time in geojson

[Calvin Metcalf]

I've thrown around the idea before of adding a 4th member of the
coordinates array for time (so [x,y,z,t]) which on one hand allows you to
 model events as they go through both space and time but is probably too
fined grained for most applications which would want a feature level timing
attribute.


On Sat, Mar 8, 2014 at 1:39 PM, Karl Grossner <karlg at stanford.edu> wrote:

> Greetings,
>
> I've begun trying to extend GeoJSON objects to include reference to the
> temporal attributes of geographic features alongside their spatial
> attributes (geometry). I just wrote a little blog post about this (
> http://kgeographer.com/wp/joining-space-and-time-in-geographic-features/).
> It involves trying to fold in elements of Topotime, which models
> PeriodCollections; http://dh.stanford.edu/topotime, and its handling of
> uncertain time.
>
> I've approached this two ways: 1) adding a "periods": [ ] array to a
> GeoJSON FeatureCollection (
> https://github.com/kgeographer/catalhoyuk/blob/master/figurine.json); and
> 2) adding one or more "temporalExtent": [{}] element of a GeoJSON feature (
> https://github.com/kgeographer/catalhoyuk/blob/master/geotemporal_fig.json
> )
>
> Added to that, I'd like to make this JSON-LD compatible. This isn't a
> theoretical exercise! I have 200-300k archaeological features to publish as
> linked data and looking to do it in useful way that adds something to the
> modeling conversation.
>
> I'd be very interested to hear comments from the GeoJSON development team
> and user community on this; granted I don't have a full-fledged proposal
> worked out, but hopefully enough for a discussion.
>
> cheers,
> Karl
>
>
> -------------
> Karl Grossner
> Digital Humanities Research Developer
> Stanford University Libraries
> Stanford,CA US
> www.kgeographer.org
>
>
>
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>


-- 
-Calvin W. Metcalf
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