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Generate new points on polyline from existing points on polyline

Question asked by ann.marie on Feb 27, 2013
Latest reply on Mar 4, 2013 by Wayne_Whitley
I have a polyline that represents the thalweg of a river.  I have points snapped to that polyline, which represent locations where I've collected data.  I am looking for a Python tool that will allow me to generate two points: one point located a set distance upstream of my original point on the thalweg and a second point located a set distance downstream from my original point on the thalweg.  A Python analog to DistanceAlongCurve in ICurve.QueryPointAndDistance would be great, but I can't find a tool that will do the trick.  

I am using ArcGIS 10.0 with an ArcInfo license.  Thanks!