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I have multiple points in a bay and I need to figure out the distance of each point to the nearest inlet, without going over land.

I have been told to use the Cost Path or the Cost Distance tool but am very lost. Would my 'input raster' be the inlet or the other points?

I am guessing the input cost raster would be a raster of the body of water?

Do I need to be using the ModelBuilder for this tool, or use the cost path tool first?

PolyGeo
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gros
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  • Check out this process. It's pretty much what you are looking for. See my comment at the bottom about making it easier to work with. https://gis.stackexchange.com/questions/190640/create-an-optimised-path-between-nodes-avoiding-polygons-entities – brink Jan 28 '19 at 19:55
  • Welcome to GIS SE! As a new user, please be sure to take the short [tour] to learn about this site's focused Q&A format. – Andy Jan 28 '19 at 20:23
  • As per the [Tour] there should be only one question asked per question. – PolyGeo Jun 06 '23 at 20:20

2 Answers2

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The below workflow will work (assuming I have understood your requirements):

  • Run Cost Distance

    • Source = inlets (create a raster or point feature class of just the inlets, everything else NoData).
    • Cost = 1 for water, NoData for land.

  • Use Extract Values to Points to get the least cost distance from each of your points to the nearest inlet.

enter image description here

user2856
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There is now a Cost Path as Polyline tool that will give you the output at a line instead of a raster.

Tom Dilts
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