Identify task: Input polygon into IdentifyParameters

Question

I wish to find all the features within a polygon/circle drawn by my user.

May I know if I should use IdentifyTask

Or is there a more recommended way?

Use Case: User drawn a circle/polygon and it will display all the address within the area.

Are all the features within a single layer in the mapservice? — Kirk Kuykendall, Jul 9, 2013 at 2:22
yes, apparently identifytask only return a feature...any help on this? — seesee, Jul 9, 2013 at 2:24
The Identify task allows you to specify which layers in the mapservice you are interested in, whereas the Query task is for a particular layer. — Kirk Kuykendall, Jul 9, 2013 at 2:27

seesee · Accepted Answer · 2013-07-09 16:45:07Z

The solution is to use QueryTask.

It accepts a Query

which the a geometry parameter can be input to search for features within the specified criterias.

Using QueryTask.execute(parameters,callback,errback) method. It will return a feature set on onComplete(featureSet) callback.

which contains a property call features

By looping through the features[]. We can get the set of features within the geometry.

CLJ · Accepted Answer · 2013-07-09 02:24:20Z

0

It will accept any type of geometry, typically you would pass it a point, but you could pass in a polygon that is drawn on the screen.

answered Jul 9, 2013 at 2:24

CLJ

8231 gold badge6 silver badges17 bronze badges

yes but apparently it only return a feature. I am trying to find all the address within a geometry.
– seesee
Jul 9, 2013 at 2:27
It returns an identifyResult, not a feature: developers.arcgis.com/en/javascript/jsapi/identifyresult.html
– CLJ
Jul 9, 2013 at 2:33
An identified feature. - yes 1 feature only.
– seesee
Jul 9, 2013 at 2:36
I don't think you understand. The identify result does not return a single feature, it returns a identifyresult, which is an object that contains an array of features. The identifytask can query multiple layers and return features from these layers. Perhaps you need to rephrase your question.
– CLJ
Jul 9, 2013 at 10:23
developers.arcgis.com/en/javascript/jsapi/identifyresult.html in the properties you will see "feature" only. It will return a single feature. What I need is queryTask. developers.arcgis.com/en/javascript/jsapi/querytask.html which returns a featureset
– seesee
Jul 9, 2013 at 16:39

| Show 2 more comments

2 Answers 2