topic Re: Feature Reduction not working for dynamic Feature Layer in ArcGIS Web AppBuilder Questions

Feature Reduction not working for dynamic Feature Layer

ShaikhRizuan — Wed, 03 Jan 2018 05:56:58 GMT

Hi,

I am adding large amount of points as a dynamic feature layer, and try to cluster those point features by using the below code:

.............................................................................

.....

this.dynamicFL.enableFeatureReduction();

this.dynamicFL.setFeatureReduction({

type:"cluster",

clusterRadius:20

});

I am getting this error : this.dynamicFL.enableFeatureReduction is not a function

Do feature reduction supports for dynamic layer?? How can i achieve this??

Re: Feature Reduction not working for dynamic Feature Layer

RobertScheitlin__GISP — Wed, 03 Jan 2018 13:46:19 GMT

Shaikh,

That feature as added at 3.22 so it is not available in 3.21 API you are using.

https://developers.arcgis.com/javascript/3/jsapi/featurelayer-amd.html#enablefeaturereduction

So you need to use the latest version of WAB instead.

Re: Feature Reduction not working for dynamic Feature Layer

ShaikhRizuan — Thu, 04 Jan 2018 09:42:06 GMT

I am using WAB 2.5 ver. and have changed the JS API from 3.21 to 3.23. After updating only the API, I am getting this error: "Cannot read property 'call' of undefined" while executing my widget. PFB Image of the error.

Do I need to upgrade the WAB (i.e. WAB 2.6) also??

In case, if it should work after upgrading the JS API, then kindly help me. I am attaching my widget.js file. Here, i am trying to create class break renderer and adding context menu to the dynamic feature layer on "Load" event. While debugging, I found that if i comment the below line its working fine.

this.eventListner = this.dynamicFL.on("load",this.createToolbarContextMenu("state",this.secValueName,this.dbSelectCategory.options[this.dbSelectCategory.value].label,this.dbSelectSubCategory.options[this.dbSelectSubCategory.value].label));

Re: Feature Reduction not working for dynamic Feature Layer

RobertScheitlin__GISP — Thu, 04 Jan 2018 12:31:26 GMT

I would say you need to update WAB.

Re: Feature Reduction not working for dynamic Feature Layer

ShaikhRizuan — Fri, 05 Jan 2018 12:41:57 GMT

Robert,

I did the changes. I updated the WAB version from 2.5 to 2.6 with AGS 3.23.. But no luck.. same error "Cannot read property 'call' of undefined" while executing my widget." . if i comment the above line (i.e. on FeatureLayer load event), it works fine.

while debugging it is going smoothly to the last line of the "_getStateResults" method without any exception.After that, error added on console.

Re: Feature Reduction not working for dynamic Feature Layer

RobertScheitlin__GISP — Fri, 05 Jan 2018 13:49:05 GMT

Shaikh,

From what I understand feature reduction does not work on FeatureLayers coming from FeatureCollections.

Re: Feature Reduction not working for dynamic Feature Layer

ShaikhRizuan — Fri, 05 Jan 2018 13:53:59 GMT

Robert,

OK.. Actually after configuring, I am not able to run the widget due to above error. How can I make my widget work??

Re: Feature Reduction not working for dynamic Feature Layer

ShaikhRizuan — Fri, 05 Jan 2018 14:09:26 GMT

Robert,

I have tried with JS API 3.22 with WAB 2.6. Its working without any issue !!! But why its not working with 3.23 with WAB 2.6 ??

Also is there any scope to show the "featureReduction" feature for dynamically added points??

Re: Feature Reduction not working for dynamic Feature Layer

RobertScheitlin__GISP — Fri, 05 Jan 2018 14:26:57 GMT

WAB 2.6 has not been tested to work with JS API 3.23. It is only validated to work with 3.22. You will need WAB 2.7 if you want a WAB that has been validated with 3.23.

Also is there any scope to show the "featureReduction" feature for dynamically added points??

I do not understand...

Re: Feature Reduction not working for dynamic Feature Layer

ShaikhRizuan — Fri, 05 Jan 2018 16:42:15 GMT

Robert,

In my requirement, I have to show more than lakhs of points on map. Where these points shall be uploaded from excel sheet or from flat table with lat-long. Also i have to perform class break renderer analysis on those points.

Drawing all those points at a time lead to performance degradation. So, i would like to cluster those points, along with renderer.

Re: Feature Reduction not working for dynamic Feature Layer

RobertScheitlin__GISP — Fri, 05 Jan 2018 16:55:12 GMT

Shaikh,

Oh, I thought you said you got feature reduction to work.

I have tried with JS API 3.22 with WAB 2.6. Its working without any issue !!!

Re: Feature Reduction not working for dynamic Feature Layer

ShaikhRizuan — Fri, 05 Jan 2018 17:52:01 GMT

Robert,

Actually i got rid of this "Cannot read property 'call' of undefined" earlier.

Now after setting cluster radius properly its working fine...

Best Regards,

Shaikh

Re: Feature Reduction not working for dynamic Feature Layer

GillPaterson — Wed, 05 Jun 2019 10:33:58 GMT

Hi Shaikh,

I realise that this was a while ago now, but do you remember how you set the "cluster radius properly"?

Thanks,

Gill

Re: Feature Reduction not working for dynamic Feature Layer

ShaikhRizuan — Tue, 02 Jul 2019 11:43:26 GMT

Hi Gill,

Its depends on how your points closed to each other, I did it based on the visualization. Please refer the below link

https://developers.arcgis.com/javascript/3/jsapi/featurelayer-amd.html#setfeaturereduction

Regards

Shaikh

Re: Feature Reduction not working for dynamic Feature Layer

GillPaterson — Tue, 13 Aug 2019 02:37:28 GMT

Thank you