topic Re: Creation of empty FeatureLayer in ArcGIS JavaScript Maps SDK Questions

Creation of empty FeatureLayer

Aeseir — Fri, 22 Jul 2022 00:55:55 GMT

Is it possible to create an empty feature layer that is populated by client side data later on?

I've only been able to create FeatureLayer when I have data to populate

Re: Creation of empty FeatureLayer

UndralBatsukh — Fri, 22 Jul 2022 16:03:17 GMT

Hi there,

Yes it can be done easily. You can create an empty client-side FeatureLayer by setting its source property to an empty array. Then you can add and remove features from it by calling applyEdits method.

This is explained here: https://developers.arcgis.com/javascript/latest/api-reference/esri-layers-FeatureLayer.html#creating-a-featurelayer

This sample shows the process: https://developers.arcgis.com/javascript/latest/sample-code/layers-featurelayer-collection-edits/

Re: Creation of empty FeatureLayer

Aeseir — Sat, 23 Jul 2022 10:43:24 GMT

I've tried doing a empty [] for source previously but then it just throws this error: table feature layer can't be displayed. Hence this question :).

Re: Creation of empty FeatureLayer

UndralBatsukh — Mon, 25 Jul 2022 16:21:15 GMT

Hi there,

Please read the doc from the link I provided above. Creating a FeatureLayer section in FeatureLayer doc has a section called Add an array of client-side features. This section explains all required schema properties you need to set to successfully initialize your client-side FeatureLayer. You must set the geometryType property in the class constructor to let the api know that you are creating a spatial FeatureLayer. Otherwise, the api assumes you are creating a non-spatial FeatureLayer and non spatial FeatureLayer cannot be added to the map.

Re: Creation of empty FeatureLayer

Aeseir — Wed, 27 Jul 2022 04:08:15 GMT

Yep read it through, eventually came across another similar post that resolved it through GeometryType (as per your message here)