[GRASS-user] how to change all cats in a vector line

[Helmut Kudrnovsky]

Michael Barton wrote
> Thanks for mentioning v.segment Helmut.
> 
> If I read the docs correctly, it is necessary to send v.segment a text
> string or file with one line for each point to be created, indicating
> which cat in the line object is being referenced. I’m trying to automate
> this for different streams where there can be a variable number of cats,
> representing line segments of different lengths. And I’m trying to create
> somewhere between several hundred to several thousand points. So a wrapper
> like v.fixed.segmentpoint makes more sense, but would need to work for an
> entire line object or for a set of cats (rather than a single cat).
> 
> Michael
> ____________________
> C. Michael Barton
> Director, Center for Social Dynamics & Complexity
> Professor of Anthropology, School of Human Evolution & Social Change
> Head, Graduate Faculty in Complex Adaptive Systems Science
> Arizona State University
> 
> voice:  480-965-6262 (SHESC), 480-965-8130/727-9746 (CSDC)
> fax: 480-965-7671 (SHESC),  480-727-0709 (CSDC)
> www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> On Nov 30, 2014, at 12:21 PM, 

> grass-user-request at .osgeo

> <mailto:

> grass-user-request at .osgeo

> > wrote:
> 
> From: Helmut Kudrnovsky <

> hellik@

> <mailto:

> hellik@

> >>
> To: <

> grass-user at .osgeo

> <mailto:

> grass-user at .osgeo

> >>
> Date: November 30, 2014 at 12:04:09 PM MST
> Subject: Re: [GRASS-user] how to change all cats in a vector line
> 
> 
> v.fixed.segmentpoints is just a wrapper script of v.Segment
> 
> http://grass.osgeo.org/grass71/manuals/v.segment.html
> 
> v.segment is very flexible.
> 
> you have to define rules (e.g. lines with different cats). IMHO it's the
> way
> to go if the river segments have different cats.
> 
> in v.fixed.segmentpoints I've implemented that the attribute table
> contains
> the distance from source, but that's not implemented in v.segment.
> 
> 
> 
> -----
> best regards
> Helmut
> --
> View this message in context:
> http://osgeo-org.1560.x6.nabble.com/how-to-change-all-cats-in-a-vector-line-tp5175575p5175693.html
> Sent from the Grass - Users mailing list archive at
> Nabble.com<http://nabble.com/>.
> 
> 
> 
> _______________________________________________
> grass-user mailing list

> grass-user at .osgeo

> http://lists.osgeo.org/mailman/listinfo/grass-user

what about a script with a loop through all line cats by using
v.fixed.segmentpoints?

in v.fixed.segmentpoints I've implemented that only distance between the
points (e.g. every 5 meter) has to be given, the calculation for any length
is done automatically.



-----
best regards
Helmut
--
View this message in context: http://osgeo-org.1560.x6.nabble.com/how-to-change-all-cats-in-a-vector-line-tp5175575p5175728.html
Sent from the Grass - Users mailing list archive at Nabble.com.