[GRASS-dev] difference between flatten graph and a tree

Markus Neteler neteler at itc.it
Thu May 10 16:34:41 EDT 2007

Hi Nitin,

I don't have the answer, but you may be interested to browse older
from Roberto Micarelli, the original author:


The nabble.com site offers a nice search engine.
Please keep us posted on your findings to finally document them.


Nitin-7 wrote:
> Hello friends,
> This mail is in refrence with directed graph library of GRASS.
> I am not able to find difference between flattened graph and tree as 
> operation in library differs for both.
> I am trying to extract graph used for network vector analysis. Currently i
> am trying on modification of v.example . I am putting following cmd 
>  Vect_net_build_graph(&In,0x02,1 ,2 ,NULL,NULL,NULL,1,0) 
> This return success but with flatten graphs ( DGL_GS_FLAT ) .
> In what cases on using API Vect_net_build_graph() will provide us with
> dgnGraph_s type object having edge and node  tree graph.
> kindly help ,
> regards
> nitin 
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