>
> On Jan 25, 2012, at 9:52 AM, WanMil wrote:
>>
>> A postal_code relation catches all nodes and ways and it has to be
>> tagged once. In constrast you have N elements all tagged individual.
>> The chances are much higher that there are one or more typo errors in
>> the elements than there is one in the relation.
>>
>
> In theory this is the best
>
>> Anyhow postal_code relations need to be better maintained in the OSM
>> database.
>>
>
> relations are constantly broken in OSM and practically this doesn't work so 
> well. having individual tags provides redundancy and can be used to verify 
> consistency of the relation.

mkgmap is not a consistency checker. That's the purpose of other apps.
We have to decide for one source (or better for an order of sources). So 
if you don't trust the postal_code relations it should not be integrated 
into the precompiled bounds. That would be ok for me.

But I think the other way round (first use the tags of elements and then 
use the postal_code relations) does not really make sense for me. Either 
trust the relation or not.

WanMil

>
>> WanMil
>>
>>
>>>
>>>    Thorsten
>>>
>>
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