[georss] Time and Space

[Mikel Maron]

Hi Brian

I'm very interested in incorporating time, visualizing and acting on change. Gave a presentation outlining some thoughts on this foss4g..
http://www.foss4g2006.org/contributionDisplay.py?contribId=161&sessionId=47&confId=1

Like Raj, I think time could be seen as having wider application than just space. I've re-used the RSS and Atom time-oriented fields for some
basic stuff.

http://worldkit.org/doc/time.php

For richer time specifications, there hasn't been agreement on a single encoding. Upcoming.org has a bit to say on this..

http://community.upcoming.org/w/index.php/Nerdy_Questions#What_are_the_guidelines_you_follow_when_creating_RSS_feeds.3F

They're using xCal. There's also an old RSS 1.0 module called Event .. http://web.resource.org/rss/1.0/modules/event/


While writing this I just saw your followup. One thing about your usage, you can't associate multiple georss:where elements with a single item;
it's a one to one relationship. 

Best
-Mikel

----- Original Message ----
From: "Knoth, Brian D." <bknoth at mitre.org>
To: georss at lists.eogeo.org
Sent: Monday, February 12, 2007 1:40:54 PM
Subject: [georss] Time and Space

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
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