RE: [emergency] Illogical Naming was: Re: [emergency] Sensors and Systems Charter Starting Point

Carl,

Outstanding input! Thanks!

 

Regards,

 

Tom 
Merkle

 

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From: Carl Reed OGC 
[mailto:] 
Sent: Friday, July 15, 2005 2:07 
PM
To: Kon Wilms; Vandame, Richard; Elysa Jones
Cc: Rex 
Brooks; 
Subject: Re: [emergency] 
Illogical Naming was: Re: [emergency] Sensors and Systems Charter Starting 
Point

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 ----- 

From: "Elysa Jones" <>

To: "Kon Wilms" <>; "Vandame, Richard" 
<>

Cc: "Rex Brooks" <>; <>

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:]
>> > Sent: Thursday, July 14, 2005 
5:20 PM
>> > To: Rex Brooks; 
>> 
> 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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