I would like to do the opposite to Peak, find and mark the lowest values with points from a DEM.

[JohnnyJohansson]

I have i Hi Res DEM, (10cm/pix), and I want to filter the hight from the Points found by the Peak tool, and compare them to the low points found to determine hight differance to the nerest naibour of the low points.

I would like to do the opposite to Peak, find and mark the lowest points, and compere them to the peaks found by peak tool.

Anyone that can help med with the code to do that?

I dont know anything about python scripting... So peferly if someone could help me modyfy the peak script..

http://www.arcgis.com/home/item.html?id=3528bd72847c439f88190a137a1d0e67 

Best Regards Johnny

[ChrisDonohue__GISP · Accepted solution]

I don't know the exact answer, but will toss out a some ideas for thought: 

1.  How about inversing your elevation data (multiply by -1), building the surface, and then running your Peak analysis?

2.  On your original data, consider using Sink (Spatial Analyst)

ArcGIS Help (10.2, 10.2.1, and 10.2.2) 

Chris Donohue, GISP

[MervynLotter]

Have you seen this workflow for identifying highest (and lowest) points within a polygon using a DEM? Do see How To: Create points representing the highest or lowest elevations within polygon features 

In step 1E, for "Statistics type", select "All", then you can choose which values you want to use in the workflow (min, max). 

Summary

"Using a Digital Elevation Model (DEM) raster and the Spatial Analyst extension, the location of the highest or lowest elevation can be identified for polygon features of interest. This procedure describes a basic workflow that generates a point feature class of the highest point within each polygon feature. In this example, highest elevations are used, but method this also works for lowest elevations."

[JohnnyJohansson]

Thanks Chris!

Now I just need to find a suitabel value to make the con tool to select peaks hier than 2meter from the lowest low value within a radius of 5meters... Or how I'm going to do it..