[Tagging] Tagging Metropolis

robert at elsenaar.info robert at elsenaar.info
Wed Jan 19 07:50:54 GMT 2011

What ever solution we are going to use. By rendering all countries,  
the relative picture should be the same.

Prominence 4 in America is a city with a lot more inhabitants then a  
prominace 4 in Belgium. Knowledge of the country should decide the  
prominence. To have a clear discussion, every country should define  
the rules on wich the prominence is made. (future-proof)

for example:
On a high zoom level e.g. prominence => 7 should be visible. On a  
higher zoom level lower prominences will become visible.

In that case users of our data can choose if they are using the  
adminstatative or the prominence rank to build up there map.


Citeren Steve Bennett <stevagewp at gmail.com>:

> On Wed, Jan 19, 2011 at 4:27 PM, John Smith   
> <deltafoxtrot256 at gmail.com> wrote:
>> The problem here is subject v objective tagging, in terms of airports
>> this can be objective stated based on international flights a day and
>> the same with cities, if you want to indicate population tag
>> population, take for example some regional 'cities' in Australia some
>> have 50,000 or less people but still call themselves a city.
> Yes, that's right. A map that is based 100% on objective, indisputable
> facts with no interpretation is unlikely to be the best possible map.
> How do we handle differences in interpretation? We'll need processes.
> And I think you give a good example. If there is only one town of any
> description in the middle of a vast desert, it ought to be shown at
> even low levels of zoom. This is standard practice in many maps,
> atlases etc. A town of 50,000 would barely even rate a mention in
> France, whereas that's pretty big for Australia. And a town like Eucla
> in the nullarbor (pop 50) has very high prominence as it's the only
> place for many miles with accommodation.
> Btw, Google does a much better job of this than Mapnik:
> http://osm.org/go/s6Xrs
> http://maps.google.com/?ie=UTF8&hq=&hnear=Moondarra+State+Park,+Moondarra+Victoria+3825,+Australia&ll=-32.676373,130.297852&spn=13.151424,11.491699&z=7
> Steve
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