Help with SSN and SOSA for Features

[Thad Guidry]

Hi All,

I began looking at subtleties for a Sensor between SOSA and SSN.

One in particular that is under some discussion in ICT is that of Features.

Both Ontologies have FeatureOfInterest :
http://w3c.github.io/sdw/ssn/#SSNFeatureOfInterest

and
http://w3c.github.io/sdw/ssn/#SOSAFeatureOfInterest

but where I get a bit confused is the use case for SSN's
http://w3c.github.io/sdw/ssn/#SSNofFeature

I know its a mediator in essence, but I need an example, the description didn't quite help me enough and had me reeling about the difference of an Observable and a Feature.  (cousins perhaps in an alternate universe? lol)

"of feature - A relation between some aspect of a sensing entity and a feature. For example, from a sensor to the features it can observe properties of, or from a deployment to the features it was installed to observe. Also from a measurement capability to the feature the capability is described for. (Used in conjunction with forProperty)."

I need some real world example that uses SSN's ofFeature.

Anyone have any examples ?