[GRASSLIST:2650] Re: eliminating stream fragments

[Christopher Fonnesbeck]

On Feb 16, 2004, at 1:40 PM, Radim Blazek wrote:
>>>
>>
>> How does one "place points" with v.net.alloc? I have browsed the
>> documentation, and assume it has something to do with the ccats
>> argument, but am not clear what this argument does, based on the
>> examples given in the html docs.
>
> Sorry, not at any node but at one node (one point). You have to do that
> by hand in v.digit.

Well, I do have a point layer of bridges that I combined with the 
stream layer using v.patch (see attached figure). However, when I use 
v.net.alloc with one or more of the bridges on the network, I get a 
whole series of "dglShortestPath error: Head Node Not Found" errors, 
and the resulting output layer is no smaller than the original, despite 
several breaks in the original network. Am I missing a step?

Thanks,
C.
--
Christopher J. Fonnesbeck ( c h r i s @ f o n n e s b e c k . o r g )
Georgia Cooperative Fish & Wildlife Research Unit, University of Georgia
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