sent from a phone

> On 1. May 2019, at 10:17, Joseph Eisenberg <joseph.eisenb...@gmail.com> wrote:
> 
> - A tag/value combination and geometry is verifiable if and only if
> independent users observing the same feature would make the same
> observation every time.


every time means under the same circumstances, there are features that are not 
always present but only on a schedule (opening hours is typically used). Or the 
coastline changes periodically with the tides. Or intermittent waterways.



> 
> - Objective criteria, clearly documented on the wiki, help to make
> tagging verifiable by individual mappers.
> 
> Examples <new heading>
> 
> Objective Criteria: e.g. Building Height <subheading>


e.g. the building height isn’t sufficiently defined to get to the same results 
every time you measure it, because it is not defined where to measure it (which 
ground elevation is the relevant one)

Cheers, Martin 

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