topic Re: ,Comparing Debris flow runout in ArcGIS Pro Questions

,Comparing Debris flow runout

MuthannaManeyapandaAppaiah — Tue, 14 May 2024 20:20:36 GMT

Hello,

I am trying to find a way to compare the actual debris flow runout to a simulated runout.(Both Rasters) and quantify the results. A simple difference between areas is too coarse. Would it be possible to create a comparison so that it informs true positves(simulated=actual),false postives(simulated present when not actual) and false negatives(no simulated but actual there) and negatives ( no simulated no actual)? image attached for reference.

Or any other approach?

Thank you

Re: ,Comparing Debris flow runout

DanPatterson — Tue, 14 May 2024 22:45:34 GMT

An overview of the Logical Math toolset—ArcGIS Pro | Documentation

many functions in the above for condition checking.

If you want to provide a specific classification, then you could use these to provide the classes

Is Null (Spatial Analyst)—ArcGIS Pro | Documentation

Con (Spatial Analyst)—ArcGIS Pro | Documentation

2 rasters, A and B

conceptually

Con(IsNull(A) and IsNull(B), 0, Con(IsNull(A), 1, Con(IsNull(B), 2, 3))) # check the closing brackets not near an IDE

Re: ,Comparing Debris flow runout

MuthannaManeyapandaAppaiah — Wed, 22 May 2024 17:09:26 GMT

Thank you Dan! I shall give that a go.