[OSM-dev] OSM Data Update

[Frederik Ramm]

Hi,

Jim Brown wrote:
> Frederik wrote:
>> You should never assume that OSM Way IDs (or indeed any IDs) remain 
>> unchanged. The "data" layer on www.openstreetmap.org is your friend if 
>> you want to find out the history of a particular stretch of motorway.
> 
> If the ids change it makes diff processing a bit difficult...  

Full diff processing will be unaffected if someone deletes a stretch of 
motorway and re-creates it with a different id.

It is only if you would, for example, import all motorways into your own 
database and then try to process diffs regarding these, without 
processing diffs that would create new motorways. In that case, if 
someone deletes something and re-creates it, you will lose it.

Bye
Frederik