sent from a phone

> On 1 Dec 2016, at 10:42, Colin Smale <> wrote:
> What would this "visibility" tag *actually* be used for? Choosing the right 
> size of icon on a map? Navigation hints for pilots? Choosing where to stand 
> for the best view?

it could help deciding what to show when. For things, e.g. advertisement, it is 
a possible way of classification 

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