Watershed delineating using local server and arcgis runtime sdk for .net?

Question

Hi,

I am trying to build a WPF Desktop app, wherein I am using Local server to consume a geoprocessing package. The idea is to develop an app where I can click at a location, to mark an outlet point, on the map and click the generate button to generate the watershed above the outlet. I tried to follow the sample from https://developers.arcgis.com/net/latest/wpf/sample-code/local-server-geoprocessing/

But not successful in achieving the goal and I get “Job failed” message box.

I am attaching the code also. Any help is much appreciated.

MainWindow.xaml.cs.zip

WatershedDelineation.tpk.zip

MainWindow.xaml.zip

WatershedDelineation.gpk.zip

ShrivastavManish · Answer

Hi Mike,

I have tried to follow the instructions and rewritten the tool making sure that everything is output to "ScratchGDB" but I am still not able to get Raster Attribute Table from the output of Flow Accumulation. I have also tried to create the attribute table using "Build Raster Attribute Table" tool, which runs without any error but fails to create the attribute table.

With all this I am still getting the same Geoprocessing Error as earlier.

Thanks

Manish

MichaelBranscomb · Answer

Hi,

Looking at the error message, it indicates that there was a problem reading the raster dataset that is the input to the Snap Pour Point (Spatial Analyst) tool - specifically it failed to find or read the VAT (raster attribute table).

In your Model, that's the output from the Flow Accumulation tool therefore I recommend looking at the properties of that tool. For example, where is the output being written? I always advise using the environment variables %ScratchFolder% or  %ScratchGDB% for the ScratchWorkspace e.g. %ScratchFolder%\FlowAccOutput.tif.

For more info see:

- Scratch Folder (Environment setting)—Help | Documentation.

- Scratch GDB (Environment setting)—Help | Documentation.

Then in your Model properties window set the location of the Scratch Workspace environment to a folder you know exists e.g. C:\WatershedDelineation\Scratch in which you have created a file geodatabase `scratch.gdb`.

These variables are substituted at runtime by ArcGIS whether running in the context of ArcMap or ArcGIS Runtime Local Server.

Thanks

Mike

ShrivastavManish · Answer

Hi Mike,

Thanks for pointing out to resourceful documentations. I tried to make some adjustments in the code as pointed out in the link https://github.com/Esri/arcgis-runtime-samples-dotnet/blob/master/src/WPF/ArcGISRuntime.WPF.Viewer/Samples/Geoprocessing/AnalyzeViewshed/AnalyzeViewshed.xaml.cs#L70.

After running the code, "Job Failed" message box shows up with message as follows:

I am attaching the new code as well.. Please let me know the work around.

Thanks,

Manish

MainWindow.xaml.cs.zip