I am looking for software to interpolate hydrochemistry point measurements along linear stream network. Interpolation algorithm should use non-Euclidian distance matrix (distance along the river network instead of Euclidean distance).

SSN for R paired with STRAS for ArcGIS Desktop does it: https://www.fs.fed.us/rm/boise/AWAE/projects/SpatialStreamNetworks.shtml But I am looking for some more user-friendly, out of the box solution (including commercial software) as I not a statistician or programmer.

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