[GRASS-user] Calculating distance between 2 point vectors along a line vector

[Helmut Kudrnovsky]

Hi, 

given following data :

- data 1 point vector , e.g. sample points along a river 
- data 2 point vector, e.g.  point pollution Inputs in a river 
- data 3 line vector, e. g. rivers or streams 

Any ideas how to calculate the distance between the points of data 1 and
data 2 along the vector lines in data 2?



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best regards
Helmut
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