[georss] Time and Space

[Ron Lake]

Hi,

Just so everyone knows - GML provides a temporal schema (temporal.xsd)
that incorporates encodings for time instants (moment in time) and time
intervals.  These can be restricted to 8601 format or be more general
times (e.g. ordinal times).  I think it would make sense to extend your
GML profile rather than re-invent the wheel as Brian D. suggests.  This
would allow for a variety of types of times.  For clarity here you are
going to eventually need a more explicit feature construct - i.e. the
meaning of "where is being stretched little by little.

Cheers

Ron

-----Original Message-----
From: georss-bounces at lists.eogeo.org
[mailto:georss-bounces at lists.eogeo.org] On Behalf Of Raj Singh
Sent: February 12, 2007 10:36 AM
To: georss at lists.eogeo.org
Subject: Re: [georss] Time and Space

One of the major concepts of GeoRSS is to be less geo-centric, so my  
initial reaction is to advise attaching the time period to your more  
general information nugget instead of the geometry, but I'm not sure  
if you are working with an RSS feed in the first place.

Your requirement gets at the specification of start time and  
expiration of information. Most flavors of RSS have some sort of  
'publication' date, but even that doesn't have the semantics of what  
you're talking about, so I agree your requirement isn't fulfilled  
somewhere else.

So if you're working with Atom+GeoRSS, the most universal approach  
would be to extend the Atom item with more specifics about time.
---
Raj


On Feb 12, 2007, at 8:40 AM, Knoth, Brian D. wrote:

> Hi,
>
> I'm new to this mailing list, yet have been advocate of RSS and geoRSS
> on some internal projects for a while. I do have a few concerns with
> regard to real practical acceptance of geoRSS, yet, I understand the
> need to try and balance simplicity and expressiveness. As such, we are
> attempting to utilize GML geoRSS, however, we have needed to extend  
> the
> GML geoRSS with the ability identify time as well as space.
>
> I wanted to just send out our approach to doing this to get comments
> from anyone else who might be interested in this on the mailing list.
> Simply put, we have added a GML TimePeriod to each of the geoRSS nodes
> along with the spatial representation. Here is an example:
>
> <georss:where>
> 	<gml:TimePeriod>
>    		<gml:begin>2006-06-17T09:55:00Z</gml:begin>
> 		<gml:end>2006-06-17T10:30:00Z</gml:end>
> 	</gml:TimePeriod>
> 	<gml:Point>
> 		<gml:pos>37.65356495497155 -114.5048399056895</gml:pos>
> 	</gml:Point>
> </georss:where>
>
> All comments would be appreciated.
>
> Regards,
> brian
> _______________________________________________
> georss mailing list
> georss at lists.eogeo.org
> http://lists.eogeo.org/mailman/listinfo/georss

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