LocationAllocationResult

Summary

An object containing the results of a location-allocation analysis that can be used to access outputs and solver messages.

Discussion

Instances of this class cannot be created directly. Instead, they are returned by the solve method of the LocationAllocation class.

Learn more about how to use the result object to access and work with the analysis outputs

Properties

Property	Explanation	Data Type
isPartialSolution (Read Only)	Returns True if the solver produced a partial solution, meaning that not all inputs were included in the results. This can occur if one of the inputs is unlocated and the solver class's ignoreInvalidLocations property is set to True.	Boolean
solveSucceeded (Read Only)	Returns True if the solve was successful.	Boolean
spatialReference (Read Only)	Returns the spatial reference of the output features. For example, feature classes created using the export method and geometry objects retrieved from the searchCursor method will have this spatial reference. The spatialReference value is typically the spatial reference of the network dataset or service used in the analysis.	SpatialReference

Method Overview

Method	Explanation
count (output_type)	Returns the number of rows for an output type.
export (output_type, output_features)	Exports the analysis results to a feature class or table. The output features will be created in the spatial reference of the network dataset used for the analysis. If the arcpy.env.outputCoordinateSystem environment is set, the output features will be created with the specified coordinate system instead.
extent ({output_type})	Returns the extent of the analysis output. The method returns a RuntimeError exception if the analysis solve failed.
fieldNames (output_type)	Returns a list of field names supported by a specified output type.
saveAsLayerFile (file_name)	Save the analysis result and settings to a layer file or layer package. The layer file or package can be opened in ArcGIS Pro as a record of the analysis settings or to visualize the results. A layer file can also be opened in ArcGIS Desktop. The method returns a RuntimeError exception if the allowSaveLayerFile property on the solver object is set to False. Legacy: Routing services based on portals running versions of ArcGIS Enterprise older than 10.9 do not support saving layer packages. The method returns a RuntimeError exception if this is the case.
searchCursor (output_type, field_names, {where_clause})	Establishes a search cursor on the specified output type. This cursor can be used to read rows directly from the output.
solverMessages (severity)	Get error, warning, and informational messages returned by the solver.

Methods

count (output_type)

Parameter	Explanation	Data Type
output_type	The type of output features to count. Set this parameter using the LocationAllocationOutputDataType enumeration.	Object

Return Value

Data Type	Explanation
Integer	The number of rows.

Raises no exception.

export (output_type, output_features)

Parameter	Explanation	Data Type
output_type	The type of output to export. Set this parameter using the LocationAllocationOutputDataType enumeration. See descriptions of the fields included in each output type	Object
output_features	The catalog path to the output feature class or table that will contain the exported features.	String

extent ({output_type})

Parameter	Explanation	Data Type
output_type	The type of output features for which to get the extent. Set this parameter using the LocationAllocationOutputDataType enumeration. If you do not specify a value, or you specify a value of None, the extent for the combined analysis outputs is returned.	Object

Return Value

Data Type	Explanation
Extent	An arcpy.Extent object indicating the extent of the designated output type.

fieldNames (output_type)

Parameter	Explanation	Data Type
output_type	The type of output for which to return a list of field names. Set this parameter using the LocationAllocationOutputDataType enumeration. See descriptions of the fields included in each output type	Object

Return Value

Data Type	Explanation
String	A list of field names supported by the specified output type.

saveAsLayerFile (file_name)

Parameter	Explanation	Data Type
file_name	The catalog path of the output layer file (.lyr) or layer package (.lpkx) to write. Caution: Layer files with an .lyr extension cannot be saved if the solver object uses a service URL as its network data source. The method returns a RuntimeError exception in this case.	String

searchCursor (output_type, field_names, {where_clause})

Parameter	Explanation	Data Type
output_type	The type of output that will be read. Set this parameter using the LocationAllocationOutputDataType enumeration.	Object
field_names [field_names,...]	A list of field names of the output type whose values will be returned by the cursor. You can get the names of the fields that are supported by an output type using the fieldNames method. See descriptions of the fields included in each output type In addition to regular fields, you can also access the geometry of the output using one of the following geometry tokens: SHAPE@XY—A tuple of the feature's centroid's x- and y-coordinates. SHAPE@XYZ—A tuple of the feature's centroid's x-, y-, and z-coordinates. SHAPE@JSON— The Esri JSON string representing the geometry. SHAPE@WKB—The well-known binary (WKB) representation for OGC geometry. It provides a portable representation of a geometry value as a contiguous stream of bytes. SHAPE@WKT—The well-known text (WKT) representation for OGC geometry. It provides a portable representation of a geometry value as a text string. SHAPE@—A geometry object for the feature. The SHAPE@XY and SHAPE@XYZ tokens are only supported for point-based output types. The x-, y-, and z-values returned when using the SHAPE@XY and SHAPE@XYZ tokens are in the spatial reference reported by the solver result object's spatialReference property, and this is typically the same as the spatial reference of the network data source used for the analysis.	String
where_clause	An optional expression that limits the records returned. For more information on WHERE clauses and SQL statements, see SQL reference for query expressions used in ArcGIS. (The default value is None)	String

Return Value

Data Type	Explanation
Object	A SolverResultSearchCursor object that reads rows from the output.

solverMessages (severity)

Parameter	Explanation	Data Type
severity	The type of messages to be returned. The parameter should be specified using the MessageSeverity enumeration.	Object

Return Value

Data Type

Explanation

List

The messages are returned as a list of lists. The inner list contains two values; the first is a number representing the message code, and the second value is the message text. An example of a list of messages returned from a failed origin destination cost matrix analysis. [[-2147200995, '0 location(s) in "Destinations" are valid. Need at least 1 valid location(s).'], [30024, 'Solve returned a failure.'], [-2147200995, 'Insufficient number of valid locations in "Origins" or "Destinations".']]