[Tagging] Giant river multipolygons

John F. Eldredge john at jfeldredge.com
Mon Jan 28 17:28:33 GMT 2013


Malcolm Herring <malcolm.herring at btinternet.com> wrote:

> On 28/01/2013 16:26, Tobias Knerr wrote:
> >   I'd like to hear your opinions.
> 
> +1
> As a developer of both editing and rendering software, such data 
> structures are troublesome. I dislike multipolygons with multiple 
> disjunct outers both as a mapper & as a developer. I have had to
> abandon 
> edits when warned that I was about to break a multipolygon with 999 
> other members. How can one know what that structure is if one cannot
> see 
> it all in a feasible JOSM download?
> 
> 
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Given the size and complexity of major river basins such as the Danube, I would imagine that it would be impossible to map them in much detail without running into this 999-member limit on a relation that tries to include the entire river.

-- 
John F. Eldredge -- john at jfeldredge.com
"Reserve your right to think, for even to think wrongly is better than not to think at all." -- Hypatia of Alexandria




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