[Talk-GB] Size - Importance of features - (Was Drinking Map of UK)

[Andy Robinson]

I personally try very hard to eliminate subjective tagging and often there
is a solution can be found that is not.

 

For example, retail units are normally distinguished (within the retail
trade) by the area size. Easy enough to calculate approx. area from the OSM
data so no real need to add anything extra.

 

Cheers

Andy

 

From: Graham Jones [mailto:grahamjones139 at gmail.com] 
Sent: 06 November 2011 15:12
To: Craig Loftus
Cc: talk-gb at openstreetmap.org
Subject: [Talk-GB] Size - Importance of features - (Was Drinking Map of UK)

 

Thanks Craig,

I think you are right - we can move the beer map discussion to the wiki.  

There is just one point I wanted to raise, which is more generic.

 

My main remaining concern is the invention of the industry key.

 

The issue we have here is trying to distinguish between the relative sizes
of features (in this case breweries), which we are proposing to do by having
'craft=' or 'industry=' tags depending on the size.

 

I have a similar issue with other features - for example 'shop=supermarket'
can cover a huge range of things from a single shop unit sized one, to a
huge hypermarket - when producing a map you may want to give preference to
the large, more significant ones so that these always appear, and the
smaller ones only appear at lower zoom level, when there is enough space on
the image.

You get the same thing with historic features - you might want the big
abbeys and castles to appear at low zoom levels and not be obscured by
individual war memorials.

 

Therefore I wonder if another generic tag should be used to help with these
things - for highways we use 'layer', but I think something else would be
useful for other features a 'significance', 'size', or 'importance' value -
probably a number like 'layer'.

This will inevitably be subjective, but the wiki page for the feature could
have some guidance on how to define the value.

 

I wondered what anyone else thought of this, or if something similar is
already used in some places that I have not found?

-- 
Graham Jones

Hartlepool, UK.

 

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