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Subject: RE: [emergency] Illogical Naming was: Re: [emergency] Sensors and Systems Charter Starting Point
Carl,
Outstanding input! Thanks!
Regards,
Tom
Merkle
Phone: (301)
614-3720
Cell Phone: (240)
375-1966
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Greenbelt, MD 20770
Perhaps, as Elysa suggests, we do need to step back and define what we mean
by a sensor and a "sensed" event - or measurement - but I am sure that
this will also create a dialogue. As with most standards work, one needs to
start with agreement on semantics - terms, definitions and/or vocabulary. This
is often the most difficult aspect of standards development!
Anyway, in the OGC membership, we have a very large group of sensor
technology providers and users. The following are some definitions agreed to by
the OGC membership. They may be of use.
- Sensor
An entity capable of observing a phenomenon and returning an
observed value. A sensor can be an instrument or a living organism (e.g. a
person), but herein we concern ourselves primarily with modelling instruments,
not people.
- 4.12 Sensor Model
In line with traditional definitions, a sensor model is a type of
Location Model that allows one to georegister observations from a sensor
(particularly remote sensors).
- 4.13 (Sensor) Platform
An entity to which can be attached sensors or other platforms. A
platform has an associated local coordinate frame that can be referenced to an
external coordinate reference frame and to which the frames of attached sensors
and platforms can be referenced.
- 4.4 Measurement
An instance of a procedure to estimate of the value of a natural
phenomenon, typically involving an instrument or sensor. This is implemented as
a dynamic feature type, which has a property containing the result of the
measurement. The measurement feature also has a location, time, and reference to
the method used to determine the value. A measurement feature effectively binds
a value to a location and to a method or instrument.
- 4.5 Observed
Value
A value describing a natural phenomenon, which may use one of a
variety of scales including nominal, ordinal, ratio and interval. The term is
used regardless of whether the value is due to an instrumental observation, a
subjective assignment or some other method of estimation or assignment.
Have at it!
Carl
----- Original Message -----
Sent: Friday, July 15, 2005 10:47 AM
Subject: RE: [emergency] Illogical Naming was: Re: [emergency] Sensors and
Systems Charter Starting Point
> Most of what we do with our EM standards work involves the
movement of
> information in response to a detected event - be that a
visual or otherwise
> "sensed" event. Much of the discussion about
"systems" was actually more
> about work flow and dissemination of
information during an incident. We
> may should revisit the terms
we use so as not to be misunderstood - say
> sensors and work flow?
We deemed it important to designate sensors
> separately due to the work
that is developing in the labs and elsewhere
> that EM standards are
needed. These groups are looking to the TC for
> guidance and
having a special place they can discuss their specific needs
> would be
helpful. Comments? Elysa
>
> At 11:06 AM 7/15/2005, Kon
Wilms wrote:
>>I guess that proves my
point.
>>
>>Cheers
>>Kon
>>
>>On
Fri, 2005-07-15 at 06:58 -0400, Vandame, Richard wrote:
>> >
Non-sensers, perhaps.
>> >
>> > Rich
>>
>
>> > -----Original Message-----
>> > From: Kon
Wilms [mailto:
kon@datacast.biz]
>> > Sent: Thursday, July 14, 2005
5:20 PM
>> > To: Rex Brooks;
emergency@lists.oasis-open.org>>
> Subject: [emergency] Illogical Naming was: Re: [emergency] Sensors
and
>> > Systems Charter Starting Point
>> >
>>
> I have to say that I still do not see the logic behind the naming
of
>> > these focus groups.
>> >
>> > A
sensor network is a system (and may comprise multiple systems), for
>>
> example. What category do systems that do not make use of sensors
fall
>> >
under?
>>
>>
>>
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