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Utility network trace using geoprocessing tool

KarthikAditya

Hi,

I am trying to perform a trace operation by using the Trace tool in Utility Network toolbox and get a connectivity graph as result for ArcGIS 2.9 SDK. (here's my previous question on the same topic)

I am referring to the arcpy Python function (Trace (Utility Network)—ArcGIS Pro | Documentation) to view the list of parameters to use in the Geoprocessing.ExecuteToolAsync function. The code snippet is as follows:

var parameters = Geoprocessing.MakeValueArray(
"D:\\MyProject.gdb\\Communications",
"UPSTREAM", //trace type
"D:\\MyProject\\Default.gdb\\UN_Temp_Starting_Points", //starting points
null, //barriers
"Communications", //domain_network
"Cable", //tier
null, //target tier
null, //subnetwork name
null, //shortest_path_network_attribute_name
false, //"EXCLUDE_CONTAINERS",
false, //"EXCLUDE_CONTENT",
false, //"EXCLUDE_STRUCTURES",
true, //VALIDATE_CONSISTENCY
null, //condition_barriers
null, //function_barriers
"BOTH_JUNCTIONS_AND_EDGES",//traversability_scope
null, //filter_barriers
null, //filter_function_barriers
"BOTH_JUNCTIONS_AND_EDGES",//filter_scope
null,//filter_bitset_network_attribute_name
false,//filter_nearest
null, //nearest_count
null, //nearest_cost_network_attribute
null,//nearest_categories
null,//nearest_assets
null,//functions
null,//propagators
null,//output_assettypes
null,//output_conditions
false,//include_isolated_features
false,//ignore_barriers_at_starting_points
false,//include_up_to_first_spatial_container
"ELEMENTS CONNECTIVITY"//result_types
);
GPExecuteToolFlags executeFlags = GPExecuteToolFlags.AddOutputsToMap | GPExecuteToolFlags.GPThread | GPExecuteToolFlags.AddToHistory;

IGPResult result = await Geoprocessing.ExecuteToolAsync("un.Trace", parameters, null, null, null, executeFlags);
return result;

Here are my questions:

1. I want to pass only the following parameters to the GP trace tool: utility network, trace type, starting points, domain, tier and the result types. How can I set only these parameters and leave the rest to default? (This does not look possible since params args[] of MakeValueArray does not support named parameters)

2. If I have a list of Utility Network elements, how can I pass them to the starting points parameter of this function?

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Accepted answers

KarthikAditya

The function works now and a .json file with elements connectivity is created.

I had to pass all the parameters, including default values - I ran the Trace geoprocessing tool in ArcGIS Pro and referred to its Python command to get the correct parameter values and used it in my C# code.

The parameter values list of Utility Network Trace tool for reference:

var parameters = Geoprocessing.MakeValueArray(
"\\MyProject.gdb\\Communications",
"UPSTREAM",
"\\MyProject\\Default.gdb\\UN_Temp_Starting_Points",
null,
"Communications",//domain_network,
"Cable",//tier
"", //target tier
"", //subnetwork name
"", //shortest_path_network_attribute_name
"EXCLUDE_CONTAINERS",
"EXCLUDE_CONTENT",
"EXCLUDE_STRUCTURES",
"INCLUDE_BARRIERS",
"VALIDATE_CONSISTENCY",
null, //condition_barriers
null, //function_barriers
"BOTH_JUNCTIONS_AND_EDGES",//traversability_scope
null, //filter_barriers
null, //filter_function_barriers
"BOTH_JUNCTIONS_AND_EDGES",//filter_scope
"",//filter_bitset_network_attribute_name
"DO_NOT_FILTER",//filter_nearest
null, //nearest_count
"", //nearest_cost_network_attribute
null,//nearest_categories
null,//nearest_assets
null,//functions
null,//propagators
null,//output_assettypes
null,//output_conditions
//in_utility_network2,//output utility
"EXCLUDE_ISOLATED_FEATURES",
"DO_NOT_IGNORE_BARRIERS_AT_STARTING_POINTS",
"DO_NOT_INCLUDE_UP_TO_FIRST_SPATIAL_CONTAINER",
"CONNECTIVITY;SELECTION",//result_types
"NEW_SELECTION",
"CLEAR_ALL_PREVIOUS_TRACE_RESULTS",
"", //trace name
"Trace_Results_Aggregated_Points",
"Trace_Results_Aggregated_Lines",
"Trace_Results_Aggregated_Polygons",
"TRACE_INDETERMINATE_FLOW",
"DO_NOT_VALIDATE_LOCATABILITY",
"DO_NOT_USE_TRACE_CONFIGURATION",
"", //trace config name
"D:\\ArcGIS\\Projects\\MyProject\\connectivity.json",
"RUN_SYNCHRONOUSLY"
);

All comments

KarthikAditya

The function works now and a .json file with elements connectivity is created.

The parameter values list of Utility Network Trace tool for reference:

KarthikAditya

Thank you for your suggestion. However, when I pass empty strings "" to optional parameters to set them to default, I get the above error. My guess is that its not allowed. Any suggestion will be much appreciated.

BeverlyPham

Hi KarthikAditya,

For the required parameters, you cannot set it to default, but for the optional parameters, you can just put "" to keep it empty and set it as default. I would recommend returning your parameters in a block and then using the parameter variable in your ExecuteToolAsync() method to make your code cleaner and easier to read.

var ParameterArray = await QueuedTask.Run(() =>
/{

return Geoprocessing.MakeValueArray("un.Trace", parameters, "", "", "");
});

IGPResult result = await Geoprocessing.ExecuteToolAsync("geoprocessing tool you want to use here(e.g. management.SelectLayerByLocation)",ParameterArray);

I hope that helps.

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