[GRASS-user] Create a point along a line in a specified distance from another point

[Moritz Lennert]

On 17/10/17 15:42, Johannes Radinger wrote:
> Hi,
> 
> is there an easy straight forward command to create a new point on a 
> line that is in a specified distance (e.g. 1000 m) from another point 
> (on the same line)?
> 
> Just an example (of course from river science): I have a sampling site 
> on a river line. I'd like to use these new point(s) to break the 
> original river lines in order to extract a line segment that is exactly 
> e.g. 2000 m long (1000 up- and downstream the sampling site).
> 
> I had a look in v.to.points but this tool only creates points in 
> equidistant steps irrespective of any other points (e.g. sampling 
> points). Another option would be using v.buffer around the sampling 
> points and then v.overlay. However, this approach would "cut" the river 
> lines in euclidean distance from the sampling site rather then in 
> line/river distance.
> 
> Any suggestions?

v.net.iso ?

Moritz