[OSM-talk] [tagging] Feature Proposal - RFC -(man_made=mineshaft)

[Shaun McDonald]

On 20 Oct 2009, at 14:44, Lesi wrote:

>> On 20 Oct 2009, at 12:05, Lesi wrote:
>>
>>>> how will you tag unmined deposits in such a scheme?
>>>
>>> If there is a unmined deposit, the mineshaft is not in use anymore
>>> -> disused=yes
>>>
>>
>> Do NOT use something like disused=yes as a modifier, you instead  
>> need  to add an extra level of indirection, so that you don't end  
>> up having disused or closed things being confused with things that  
>> are still in operation.
>>
>> Shaun
>>
>
> Could you explain this further, I do not understand what you mean.
> disused=yes is quite popular and used in combination with many other  
> things.
>

I'll take an example of an amenity=cafe since it's one that I know  
slightly better.

If you just add a disused=yes, pretty much nothing that works with the  
OSM data will recognise that it is no longer a cafe. Instead you  
should use something like old_amenity=cafe, or  
amenity=closed;closed=cafe, that way there won't be any confusion.

As another example for when a road is under construction, you can use  
highway=constriction;construction=primary, thus routing engines won't  
route along that road. If you added a construction=yes or similar tag,  
it would require so much more complex logic in the processing of the  
osm data that it wouldn't be practical to do it this way.

Shaun

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