Cost Path Analysis for a submarine cable route - help?

Discussion created by andyblackman on Mar 13, 2014
Latest reply on Apr 11, 2014 by axellarson
Hi everyone, I am having problems using the cost path analysis tool and I hope someone here can help.

For my dissertation I am trying to find the optimum route for a submarine cable from an offshore wind farm to land, using the cost path tool, taking into account slope and avoiding shipwrecks. I created a model based on the tutorial ( I have followed the steps and can achieve a cost surface, cost distance raster, cost backlink raster and a least cost path fully when just using the slope data. However, when I try and include the wreck point data in the Weighted Overlay tool it runs but creates an empty backlink raster and distance raster, and this error appears: "ERROR 010045: COSTPATH: The number of FROM cells is 0. ERROR 010067: Error in executing grid expression. Failed to execute (Cost Path)."

I was wondering if anyone knew what I am doing wrong, and how to make it work?

Thanks very much,