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Hi Steve,, To amplify Ben's point, 'feature of interest' = the feature which is of interest to the particular data user So in your example, I would expect the feature of interest not to be a geographical region at all, but the mooring itself, which has a property of location - agreed, it's quite an important property! - or if instrumentation is deployed at the mooring, the feature of interest is likely to be the ocean in the region of the mooring, which will be realised in some concrete way depending of the characteristics of the instrumentation and the requirements of the data user. For the specific issue of how to assign a location to a feature, again this is down to the the requirements of the data user. However, I'd argue that it doesn't particularly matter, as long as: (a) it captures the location to the level of precision required by the data user, (b) the relationships to other location descriptions exist and can be traversed to answer more general location queries. For practical reasons, you might choose to hold a hierarchy of locations as properties of a a feature, but it would be more effective to offload these to a Gazetteer / vocabulary server. Apologies, if I've missed the point here...which is quite possible. Regards, Bruce
From: galeon-bounces@xxxxxxxxxxxxxxxx [mailto:galeon-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Ben Domenico Sent: 08 October 2008 02:57 To: Steve Hankin Cc: Unidata GALEON Subject: Re: [galeon] Features and Coverages Hi all, First, in response to Steve's question, I obviously oversimplified the O & M concepts to make my points. The feature of interest covers a wide range of entities -- depending on the particular data user who is interested in the feature. All the items in the gazetteer list you provide are features of interest to someone studying those entities or phenomena. In fact there is a concept known as the "proximate feature of interest" in the case of observations and it is basically the area near the sensor. So that's the feature of interest to those involved more directly with the measurements. But, as Ron points out, for some data users, their feature of interest might not even exist at the time some sensors are deployed, e.g,, Hurricane Katrina or the Storm of the Century. (You'll need an event gazetteer for those.) [snip]-- Ben
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