[georss] "When" information in georss

Tue Jul 31 07:03:19 EDT 2007

Andrew:

Opps, in my prior email, I should have said gml:LineString, not
multipoint. Here is an actual example:

<item>
 <title>XXXXX (TEST/1003/CAP/RTB)</title>
 <link>XXXXX</link>
 <description>XXXXXX</description>
 <guid isPermaLink="false">XXXXXXX</guid>
 <pubDate>Wed, 06 Jun 2007 18:53:36 GMT</pubDate>
 <gml:TimePeriod>
  <gml:relatedTime>
   <gml:TimePeriod gml:id="time-0A05000263007CS.0.0.TKF">
    <gml:beginPosition>2006-06-16T07:45:00.000Z</gml:beginPosition>
    <gml:endPosition>2006-06-16T07:45:00.000Z</gml:endPosition>
   </gml:TimePeriod>
  </gml:relatedTime>
  <gml:relatedTime>
   <gml:TimePeriod gml:id="time-0A05000263007CS.0.1.ORB">
    <gml:beginPosition>2006-06-16T08:00:00.000Z</gml:beginPosition>
    <gml:endPosition>2006-06-16T09:00:00.000Z</gml:endPosition>
   </gml:TimePeriod>
  </gml:relatedTime>
  <gml:relatedTime>
   <gml:TimePeriod gml:id="time-0A05000263007CS.0.2.LND">
    <gml:beginPosition>2006-06-16T09:13:00.000Z</gml:beginPosition>
    <gml:endPosition>2006-06-16T09:13:00.000Z</gml:endPosition>
   </gml:TimePeriod>
  </gml:relatedTime>
  <gml:beginPosition>2006-06-16T07:45:00.000Z</gml:beginPosition>
  <gml:endPosition>2006-06-16T09:13:00.000Z</gml:endPosition>
 </gml:TimePeriod>
 <georss:where>
  <gml:LineString>
   <gml:pointProperty>
    <gml:Point gml:id="point-0A05000263007CS.0.0.TKF">
     <gml:pos srsName="WGS84(DD)">36.235 -115.03333333333333</gml:pos>
    </gml:Point>
   </gml:pointProperty>
   <gml:pointProperty>
    <gml:Point gml:id="point-0A05000263007CS.0.1.ORB">
     <gml:pos srsName="WGS84(DD)">37.65356495497155
-114.5048399056895</gml:pos>
    </gml:Point>
   </gml:pointProperty>
   <gml:pointProperty>
    <gml:Point gml:id="point-0A05000263007CS.0.2.LND">
     <gml:pos srsName="WGS84(DD)">36.235 -115.03333333333333</gml:pos>
    </gml:Point>
   </gml:pointProperty>
  </gml:LineString>
 </georss:where>
</item>

brian

________________________________

	From: georss-bounces at lists.eogeo.org
[mailto:georss-bounces at lists.eogeo.org] On Behalf Of Knoth, Brian D.
	Sent: Monday, July 30, 2007 4:53 PM
	To: Andrew Turner
	Cc: georss at lists.eogeo.org
	Subject: Re: [georss] "When" information in georss

	Hi Andrew:

	You may remember during discussions of when and where, that I
had limited time to figure out a solution in order to get requirements
drawn up in time to meet development schedules. Anyhow, I did decide to
draft the requirements in terms that I had last posted to this
newsgroup, namely, to use an associated gml:TimePeriod element outside
of the georss:where element (as recommended by yourself and others),
utilize a gml:multipoint object to represent multiple locations during
time period and, finally, use the gml:ID attributes of TimePeriod and
Point to associate and actual point of the multipoint with a time.

	The approach has the advantages of being representable within
the georss v1.0 application schema and GML profile. I only hope that it
does not get wiped out by any newer versions of the profile (ie, I hope
the newer version are backward compatible).

	brian

	-----Original Message-----
	From: ajturner at gmail.com on behalf of Andrew Turner
	Sent: Sun 7/29/2007 13:05
	To: Knoth, Brian D.
	Cc: Holmes, Charles V.; georss at lists.eogeo.org
	Subject: Re: [georss] "When" information in georss

	Hi Charles & Brian - did you ever resolve this question?

	I'm curious in particular in light of how best to support
responses
	from OpenSearch Geo and Time queries

	OpenSearch Time makes it easy to request a feed with a
begin/end time
	points or periods - and then would be nice to support the
response in
	the RSS/Atom (which with pubdate et al. only nominally support
"end
	dates" (last updated))

http://www.opensearch.org/Specifications/OpenSearch/Extensions/Time/1.0
/Draft_1

	By having a time period for items as well as the overall feed
would
	let consumers/aggregators understand the time period that the
feed is
	valid for.

	thanks,
	Andrew

	On 7/19/07, Knoth, Brian D. <bknoth at mitre.org> wrote:
	>
	>
	> Charles,
	>
	> You should probably contact me because a) we work for the
same company  b)
	> the feeds you are accessing are the feeds from the system I
work on and c)
	> this topic has been discussed through this community many
times before. If
	> you are interested in the history, you can probably start
here and work
	> backwards:
	>
http://lists.eogeo.org/pipermail/georss/2007-March/001258.html
	>
	> brian
	>
	>
	>  ________________________________
	>  From: georss-bounces at lists.eogeo.org
	> [mailto:georss-bounces at lists.eogeo.org] On Behalf Of Holmes,
Charles V.
	> Sent: Thursday, July 19, 2007 8:57 AM
	> To: georss at lists.eogeo.org
	> Subject: [georss] "When" information in georss
	>
	>
	>
	> In the effort of simplicity, I'm designing a system that only
knows how to
	> handle one flavor of GeoRSS (currently simple).  There are
layers between
	> the system and actual georss feeds that convert from whatever
format the
	> feed is in into a simple georss feed.
	>
	> I'm currently looking at a feed with information such as:
	> <gml:TimePeriod>
	>   <gml:relatedTime>
	>     <gml:beginPosition/>
	>     <gml:endPosition/>
	>   </gml:relatedTime>
	> ...
	> </gml:TimePeriod>
	>
	> Is there any construct in simple georss to represent this
information?  It's
	> basically a LineString and the position of each point is only
at the
	> corresponding time in the TimePeriod.  Or should I make my
understood flavor
	> of GeoRSS more complex?
	>
	> Thanks,
	> Charles
	> _______________________________________________
	> georss mailing list
	> georss at lists.eogeo.org
	> http://lists.eogeo.org/mailman/listinfo/georss
	>
	>

	--
	Andrew Turner
	ajturner at highearthorbit.com      42.2774N x 83.7611W
	http://highearthorbit.com              Ann Arbor, Michigan, USA
	Introduction to Neogeography -
http://oreilly.com/catalog/neogeography

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