What is the difference between the values calculated using the slope tool vs the slope option in the add surface information tool?

I am making a map that displays watershed slope (using the slope tool) and want to also show stream slope (using add the add surface info tool) but not sure if the calculated values are saying the same thing.

Add surface info tool (average slope bit): http://pro.arcgis.com/en/pro-app/tool-reference/3d-analyst/add-surface-information.htm

Slope tool: http://desktop.arcgis.com/en/arcmap/10.3/tools/spatial-analyst-toolbox/how-slope-works.htm#ESRI_SECTION1_C81D5590295342FF8C730744027A96C6

Here is an image showing the terrain slope and three oddly colored streams with their slope data (bottom left corner, first three rows): enter image description here

Here is another pic of only landscape slope: enter image description here

  • 1
    What happened when you tested the two tools and compared the results? – PolyGeo Jul 20 '17 at 12:03
  • Thanks for the comment, PolyGeo. Both result in percent - the numbers calculated for the streams seem possible when compared to the watershed landscape values, but I'd like to be sure before moving forward. I can post a picture in a bit if that would help. – Mike Jul 20 '17 at 12:07
  • That may be helpful to potential answerers of your question. – PolyGeo Jul 20 '17 at 12:09
  • Alright, I'll snap a picture when I get to the office. Why the downvotes? Has this question been asked before? I didn't see anything similar in previous posts. – Mike Jul 20 '17 at 12:11
  • People downvote for many reasons. A good way to avoid them is to include as much detail and research as you can at the outset. – PolyGeo Jul 20 '17 at 12:16

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