Subject: RE: [Geopriv] New Version Notificationfordraft-busin-geopriv-location-qos-req-00

From: "Thomson, Martin" <[email-masked]>
Date: Sun, 2 Dec 2007 20:51:50 -0600

Hi Sal,

The definition that I have proposed for "accuracy" [uncertainty] restricts the usage of the term to qualitative contexts.  This is consistent with its use in other domains, in particular the scientific measurement community.  Since our definitions of uncertainty and confidence derive from this community, it makes sense to be consistent with their terms.  See the appendices of [NIST.TN1297] for a clearer definition (appendix D, I think).

I know from experience that specifications, such as OMA MLP and 3GPP PCAP, RRLP and MAP are open to interpretation on their accuracy parameters.  We have an opportunity to provide a much clearer definition.

Cheers,
Martin

[uncertainty] <http://tools.ietf.org/html/draft-thomson-geopriv-uncertainty-00>

[NIST.TN1297] Taylor, B. and C. Kuyatt, "Guidelines for Evaluating and
              Expressing the Uncertainty of NIST Measurement Results",
              Technical Note 1297, Sep 1994.

> -----Original Message-----
> From: Salvatore Loreto [mailto:[email-masked]]
> Sent: Saturday, 1 December 2007 1:06 AM
> To: Carl Reed OGC Account
> Cc: [email-masked]
> Subject: Re: [Geopriv] New Version Notificationfordraft-busin-geopriv-
> location-qos-req-00
> 
> Hi Carl,
> 
> thanks for reviewing and comments the draft.
> 
> You are completely right, we should also consider the benefit related
> with legal consideration.
> We'll insert this in the next version of the draft.
> 
> About the location accuracy,
> our intention is to use "accuracy" to describe the required level from
> the application perspective, so that proper position determination
> technology can be chosen by the location server.
> 
> I also think that is good have a general definition of accuracy.
> 
> thanks
> Sal
> 
> 
> 
> On Thu, 2007-11-29 at 12:57 -0700, Carl Reed OGC Account wrote:
> > Salvatore -
> >
> > I have finished reviewing the
> > http://tools.ietf.org/wg/geopriv/draft-busin-geopriv-location-qos-req-
> 01.txt
> > document.
> >
> > A few suggestions/comments.
> >
> > 1. Section 1.1. In the benefits list, there is one benefit that always
> seems
> > to be left out when discussing Quality - whether quality of data or
> quality
> > of service. This benefit has to do with legal considerations. While
> legal
> > considerations may not be part of the purview of this WG, I know that in
> > both OMA and the OGC, quality is a major issue in terms of legal
> exposure.
> > For example, suppose that a consumer uses a location service but due to
> poor
> > location data - and no notification to the consumer in terms of the
> quality
> > of the location - some level of "injury" results. Injury could be any
> > variety of things from emotional trauma to missing a key meeting to
> personal
> > physical injury. One of the reasons the OGC is getting more heavily into
> > Quality issues is that we want to be able to warn consumers whether the
> map
> > data/location data they are using is "fit for purpose". By being able to
> > provide such information, legal exposure could be significantly reduced
> for
> > the location service provider.
> >
> > 2. Section 4.1. It might be useful to provide a generic definition of
> > horizontal accuracy before defining horizontal accuracy within the
> context
> > of the work of the GeoPRIV WG
> >
> > 3. Section 4.2: Ditto for vertical accuracy.
> >
> > Or perhaps just a general definition for location accuracy, such as "The
> > closeness of results of observations, computations, or estimates of
> graphic
> > map features to their true value or position". (From GIS Glossary, Data
> West
> > Research). I can get one that is not part of a  copyrighted book.
> >
> > I will also await comments from the OGC Quality WG.
> >
> > Regards
> >
> > Carl
> >
> >
> >
> >
> >
> 
> 
> 
> _______________________________________________
> Geopriv mailing list
> [email-masked]
> https://www1.ietf.org/mailman/listinfo/geopriv

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