[OSM-newbies] Mapping streams

[Richard Fairhurst]

xeen wrote:

> I'm trying to map a river, but I'm not exactly sure how to do so. The
> problem is, that it's not really accessible, so walking on the edge is
> not possible (it's a smaller river, so using a boat or kanu doesn't
> work either). There's a cycleway nearby, but it's not going "a fixed
> distance" from the river, so it's not possible to map the river's arcs
> without blindly guessing (when cycling along the way).
> Is there a better way than just using the accessible points and
> interpolate the rest?

Where's the river? Is there any Yahoo coverage for the area, or maybe  
out-of-copyright/public domain sources (e.g. NPE for the UK,  
OpenTopoMap for the US)?

cheers
Richard