Contents
How to use the ArcGIS API in JavaScript?
Performs an identify operation on the layers of a map service resource exposed by the ArcGIS Server REST API. Search for samples that use this class. new IdentifyTask (url, options?) Creates a new IdentifyTask object. URL to the ArcGIS Server REST resource that represents a map service. execute (identifyParameters, callback?, errback?)
How does the identifytask function in ArcGIS work?
Sends a request to the ArcGIS REST map service resource to identify features based on the IdentifyParameters specified in the identifyParameters argument. All On Style event listeners receive a single event object. Additionally, the event object also contains a ‘target’ property whose value is the object which fired the event.
When does ArcGIS fire when an error occurs?
(Added at v3.6) ArcGIS Server error message returned in a JavaScript error object. Fires when the identify operation is complete. The result of an identify operation. Fires when an error occurs when executing the task. (Added at v1.3)
When to return an error object in identifytask?
Specifies the criteria used to identify the features. The function to call when the method has completed. The arguments in the function are the same as the onComplete event. An error object is returned if an error occurs on the Server during task execution. (As of v1.3)
How is an ArcGIS polygon represented in JavaScript?
Since: ArcGIS API for JavaScript 4.0 A polygon contains an array of rings and a spatialReference. Each ring is represented as an array of points. The first and last points of a ring must be the same.
Where does the JSON object come from in ArcGIS?
The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON () method from another ArcGIS product. See the Using fromJSON () topic in the Guide for details and examples of when and how to use this function.