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I have a .shp for streams and another for pour points. Those features were extracted from a DEM by using the Hydrology package from the Spatial Analyst Tools of ArcGIS 10.

I want to know the distance between every pour point along the flow path network. What procedure should I use?

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Have you considered trying the Utility Network Analyst toolbar? It's interactive but for only four points may remain suitable - and useful to look at while you are developing your procedure. –  PolyGeo Jun 9 '13 at 0:04
    
An alternate vector processing tool is RivEX, you could vectorize the data and use the site linking tool. Have a look at this page: rivex.co.uk/html/network-site-tools.html –  Hornbydd Jun 9 '13 at 16:46

1 Answer 1

Cost Path tool can be used to derive the path of least resistance down a digital elevation model (DEM). Use the DEM for the Input cost distance raster and the output from the Flow Direction tool for the Input cost raster

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@PolyGeo , Geog thanks for your comments. I am actually trying to obtain an "OD Cost Matrix" for using it as a spatial weighting matrix in a Spatial Autocorrelation Test. I have too much nodes/streams to do a manual analysis for every possible origin-destination pair in the drainage network. I was looking for an automatic process to compose the OD Cost Matrix. I already tried to apply the Network Analysis Extension on a network dataset, which was created by right clicking the DEM-derived streams.shp in the ArcCatalog. But that did not work =( –  Jaqo Jun 9 '13 at 11:14

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