Networks / Arcs

N R A nra at
Fri Oct 21 08:09:00 EDT 1994

Can anyone point me in the direction of documentation / source code / 
whatever to do with what I'd call 'network searchs', i.e. the ability 
(preferably in GRASS) to work with the vectors which constitute a river 
network, e.g. options such as determining what arcs are upstream of a 
point on another arc.

I've been looking at the Programmers Manual concerning vectors - am I 
right in assuming that the GRASS 'Vect_read_next_line' function will just 
get the next line as it was put in the data file - it doesn't mean the 
next arc in a sequence which forms a 'line' ?


Steve Culshaw
NRA North West
e-mail : nra at (use this for general usage)
or         sculshaw at (Private - only checked at best 

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