[R-sig-Geo] Is there an annotated river dataset available?

[Karl Ove Hufthammer]

On Fri, 8 Jan 2010 13:25:24 +0100 Hans-Jörg Bibiko <bibiko at eva.mpg.de> 
wrote:
> Thanks for the hint!
> The absolute length can make sense of course but if I need also 
> the largest rivers of a smaller island then this fails or it's much 
> more tricky to handle/select.

Not really. You could for example use 'ddply' from the 'plyr' package 
to get the names/IDs of the longest rivers for each country/island/...
Then select the rivers with these names/IDs.

-- 
Karl Ove Hufthammer