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

[Helmut Kudrnovsky]

Moritz Lennert wrote
> On 17/10/17 16:10, Moritz Lennert wrote:
>> 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 ?
>> 
> 
> Or perhaps better: v.lrs.segment ?
> 
> Moritz
> _______________________________________________
> grass-user mailing list

> grass-user at .osgeo

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

See 

https://grass.osgeo.org/grass72/manuals/addons/v.fixed.segmentpoints.html

to get equidistant points along a line. It's a wrapper about v.segment.



-----
best regards
Helmut
--
Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Users-f3884509.html