[OSM-talk] Keep Mapnik relevant

[Matthias Julius]

"Thomas Wood" <grand.edgemaster at gmail.com> writes:

> 2009/1/7 Matthias Julius <lists at julius-net.net>:
>> If historic data is within the scope of OSM then it surely is not only
>> of interest for railways.  Therefore a generic way of tagging should
>> be used that can apply to any object.  Maybe removed=yes|<date>
>>
>> Matthias
>>
>
> But then we get into the messy situation of not being able to read off
> a single tag to decide what type of feature something is.
>
> Not all data clients are likely to implement a tag that means the
> logical opposite of the existence of a feature.

This is true.  Maybe it is better to use a namespace like
removed:railway=rail; removed=<date>.  This also preserves the type of
railway.

Matthias