[OSM-talk] Orphaned Relations

MP singularita at gmail.com
Wed Jul 20 01:50:09 BST 2011


On Tue, 19 Jul 2011 10:01:24 +0200, Sarah Hoffmann wrote:
> On Mon, Jul 18, 2011 at 10:28:54PM +0100, MP wrote:
>> On Mon, 18 Jul 2011 16:05:29 +0100, Ed Loach wrote:
>>>> Relations
>>>> without
>>>> members can be used intentionally,
>>>
>>> Can you give an example, please? Because I've tried and failed to
>>> think of any. Perhaps I'm just getting hung up on the name 
>>> "relation"
>>> as something which groups its related members in some way defined 
>>> by
>>> the relation's tags (while not being used as a category).
>>
>> For example in Prague there is relation for transport network which
>> contain empty relation for some tram lines - those are not 
>> operational
>> currently due to some constructions, but once these constructions 
>> are
>> finished, they can be easily restored to previous state (just dig up
>> some older version of the relation from history, check it and save 
>> it)
>
> You might just as well delete the relation while the tram line does
> not exist. You are still able to restore an old version from the 
> history
> later. There is no difference in the process. Relations should not
> be used as a garbage dump for information that might be interesting 
> in the
> future.

Yes - if you remember the ID. If you don't, finding the ID can be 
almost impossible (there is no simple way to search for deleted given 
its tags)

Martin



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