[GRASS-user] Equidistant points along lines of a vector network

César Augusto Ramírez Franco caesarivs at gmail.com
Tue Sep 23 11:44:25 PDT 2014


Have you tried v.points module?

2014-09-23 7:39 GMT-05:00 Moritz Lennert <mlennert at club.worldonline.be>:

> On 23/09/14 10:23, Johannes Radinger wrote:
>
>> Hi,
>>
>> I've got a vector network (river network) and I want to place points
>> along that network. The points should be placed every 250 m starting
>> from the outlet. Any network junctions should be ignored so that every
>> point is 250 apart from the next upstream and downstream point.
>>
>> With the tool v.segment only the single parts of the polyline (lines
>> between
>> nodes) are splitted based on the distance parameter. So v.segment ignores
>> the network. Maybe v.net.iso can be of use in this case, but here I am
>> missing
>> the option to create points in given distance classes from a starting
>> point.
>>
>>
>> Is there any specific GRASS tool or procedure for such tasks?
>>
>
> Would v.build.polylines help here ? I don't know how v.segment acts on
> polylines.
>
> Moritz
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-- 
*César Augusto Ramírez Franco*
Laboratorio de Sistemas Complejos Naturales
Escuela de Geociencias
Facultad de Ciencias
Universidad Nacional de Colombia - Sede Medellín
Teléfono: (57-4) 430 9369 - 300 459 6085
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