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

[Hans-Jörg Bibiko]

Hi,

I've a tiny question. Is there an annotated river dataset available? By 'annotated' I mean that rivers are ranked by a sort of relevance/size/length or whatever. The problem is that I have an huge SpatialLines object called 'rivers' which shows ~23200 rivers  but I have to draw a map which only shows the most largest ones (let's say 100 to 150) plus one to three rivers for a country.

Many thanks in advance for any hint.

--Hans