topic Re: calculate distance between points along stream network? in Water Resources Questions

calculate distance between points along stream network?

SierraLove_Stowell — Thu, 21 Apr 2011 16:54:38 GMT

Hi,

I have fourteen points on streams and I need to calculate a matrix of pairwise distances between all fourteen points along the stream network (91 comparisons). Getting the Euclidean distance between the points is relatively straightforward but how do I get the distance along the streams? Help!

Sierra

Re: calculate distance between points along stream network?

MarkBoucher — Fri, 22 Apr 2011 14:53:32 GMT

Could you use the cost distance tool in Spatial Analyst?

Use the stream to set a low cost in a raster along the stream and high cost elsewhere. Then do a cost distance calculation along the stream with a source grid at one end. Then then pick the cost off the resulting grid where the points are and take the difference in cost distance between points. (?)