Re: [Geopriv] Simple draft: continuous values in presence
"Carl Reed" <creed@opengeospatial.org> Fri, 21 November 2008 19:40 UTC
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From: Carl Reed <creed@opengeospatial.org>
To: "Thomson, Martin" <Martin.Thomson@andrew.com>, geopriv@ietf.org
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Date: Fri, 21 Nov 2008 12:40:19 -0700
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Cc: Mike Botts <mike.botts@nsstc.uah.edu>, Simon Cox <Simon.Cox@csiro.au>
Subject: Re: [Geopriv] Simple draft: continuous values in presence
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Martin - I have not yet this document in detail - just a quick browse. However, as I learn more and more about sensor systems (a result of the extensive standards work and implementation of sensor interface and description standards being done in the OGC community), I have a feeling that much of what you are describing has to some extent already been stated as part of some sensor standard. For example, the entire concept of "triggering" based on some set of rules. For example, the OGC SensorML standard can be used to define both the characteristics and the process model for a sensor, such as weather sensor (in-situ) or a mobile device (dynamic). The process model defines the "how" of how an observation is processed by the sensor system. This process can include rules related to time, measurement range, locations, combinations of all of these in order to specify how observations are sampled from a continuous stream. There is also considerable work being done using SensorML WRT expressing data quality and provenance of the observations. Also, we should make sure that the terminology is consistent with existing sensor standards. The following is from the OGC and ISO community: .Phenomenon: Phenomenon is associated with an identifiable object, which is the feature of interest of the observation . .Observation: An act through which a number, term or other symbol is assigned to a phenomenon . .Measurement (noun): An observation whose result is a measure . .Measure: value described using a numeric amount with a scale or using a scalar reference system . .So, Phenomenon = WIND, Observation is the "act" of the wind gauge, Measurement = Wind Speed, Measure is 20 KPH There is an OGC standard called Observations and Measurements that may be of use. This standard is now also in the process of becoming an ISO standard. I may be off base here but do want to make sure that we at least have a common and consistent use of the semantics and vocabularies of how we describe a sensor and describe and define the observation/measurements returned by a sensor. Cheers Carl ----- Original Message ----- From: "Thomson, Martin" <Martin.Thomson@andrew.com> To: <geopriv@ietf.org> Sent: Tuesday, November 18, 2008 8:14 AM Subject: [Geopriv] Simple draft: continuous values in presence > Folks who are interested in putting location in presence, please read and > provide feedback on this draft in SIMPLE. > > <http://tools.ietf.org/html/draft-thomson-simple-cont-presence-val-req> > > Ta, > Martin > ------------------------------------------------------------------------------------------------ > This message is for the designated recipient only and may > contain privileged, proprietary, or otherwise private information. > If you have received it in error, please notify the sender > immediately and delete the original. Any unauthorized use of > this email is prohibited. > ------------------------------------------------------------------------------------------------ > [mf2] > _______________________________________________ > Geopriv mailing list > Geopriv@ietf.org > https://www.ietf.org/mailman/listinfo/geopriv _______________________________________________ Geopriv mailing list Geopriv@ietf.org https://www.ietf.org/mailman/listinfo/geopriv
- [Geopriv] Simple draft: continuous values in pres… Thomson, Martin
- Re: [Geopriv] Simple draft: continuous values in … Carl Reed