Find Centroids

inputLayer (Required)

The multipoint, line, or polygon features that will be used to generate centroid point features.

Syntax: As described in detail in the Feature input topic, this parameter can be one of the following:

• A URL to a feature service layer with an optional filter to select specific features
• A feature collection

Examples:

• {"url": <feature service layer url>, "filter": <where clause>}
• {"layerDefinition": {}, "featureSet": {}, "filter": <where clause>}

pointLocation

A Boolean value that determines the output location of the points.

Values: true | false

• true—Output points will be the nearest point to the actual centroid, but located inside or contained by the bounds of the input feature.
• false—Output point locations will be determined by the calculated geometric center of each input feature. This is the default.

Example:"pointLocation" : "false"

outputName

If provided, the task will create a feature service of the results. You define the name of the service. If an outputName value is not provided, the task will return a feature collection.

Syntax:

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{
  "serviceProperties": {
    "name": "<service name>"
  }
}

In ArcGIS Online or ArcGIS Enterprise 10.9.1 and later, you can overwrite an existing feature service by providing the itemId value of the existing feature service and setting the overwrite property to true. Including the serviceProperties parameter is optional. As described in the Feature output topic, you must either be the owner of the feature service or have administrative privileges to perform the overwrite.

Syntax:

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{

  "itemProperties": {
			"itemId": "<itemID of the existing feature service>",
			"overwrite": true
	}
}

or

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{
"serviceProperties": {
    "name": "<existing service name>"
  },
"itemProperties": {
				"itemId": "<itemID of the existing feature service>",
				"overwrite": true
	}
}

context

The Context parameter contains the following additional settings that affect task operation:

• Extent (extent)—A bounding box that defines the analysis area. Only input features that intersect the bounding box will be analyzed.
• Output spatial reference (outSR)—The output features will be projected into the output spatial reference.

Syntax:

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{
"extent" : {extent},
"outSR" : {spatial reference}
}

f

The response format. The default response format is html.

Values: html | json

outputLayer

The centroid points. Example:

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{"url":"http://<analysis url>/FindCentroids/jobs/<jobId>/results/outputLayer"}

The result has properties for parameter name, data type, and value. The contents of value depend on the outputName parameter provided in the initial request.

• If outputName was provided, value contains the URL to the feature service layer.

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{
"paramName":"outputLayer",
"dataType":"GPString",
"value":{"url":"<hosted featureservice layer url>"}
}

• If outputName was not provided, value contains a feature collection.

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{
"paramName":"outputLayer",
"dataType":"GPString",
"value":{"layerDefinition": {}, "featureSet": {}  }
}

See Feature Output for more information about how the result layer or collection is accessed.