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I have a shape (line) that represents the hydromorphology of watercourses and contains several parameters. This morphological study of watercourses has been done on every 100 meters of surface watercourses.

In other side, I have another shape (point) with measurement stations that is superimposed on the watercourses.

For a specific analysis, I need 10 trenches (1000 m) in the upstream of each station to calculate the average of certain parameters.

I did a select by location with the method (are whithin a distance of the source layer feature), but it gives me a selection of 10 trenches in upstream and downstream of the measurement stations.

Anyone have a solution for having 10 trenches in upstream of each station only of the measurement stations? enter image description here

The id's of trenches are not coded in a logical sequence.

enter image description here

The lines are connected to each other and flow in the source direction

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  • Are your trenches coded with an ID in a logical sequence (if not you should be asking yourself why not?). For example your station intersects trench 66 then you need only do an attribute selection of trenches 56 to 66. This could all be automated in model builder. – Hornbydd Aug 16 '18 at 10:53
  • No, the id's of trenches are not coded in a logical sequence. The shape of this trenches are done by other part. – Loubna barra Aug 16 '18 at 13:53
  • Are the lines connected to each other at their ends and always flow in a source to sea direction? – Hornbydd Aug 17 '18 at 8:33
  • Also I think you should amend your question and add that imagine from your deleted answer as that holds vital information about attribution which people need if they are going to answer your question. As you see I am having to ask questions because you have basically provided no information about your data, just a problem with processing. Well described questions attract answers. – Hornbydd Aug 17 '18 at 8:36
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    @Hornbydd, thanks you for your questions. yes the lines are connected to each other at their ends and flow in the source direction. – Loubna barra Aug 17 '18 at 14:36

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