topic Re: Spatial condition in FeatureLayer.definitionExpression? in ArcGIS JavaScript Maps SDK Questions

Spatial condition in FeatureLayer.definitionExpression?

MassimilianoSantini — Fri, 03 Apr 2020 15:25:06 GMT

Hi,

is there a way to set a spatial condition in FeatureLayer.definitionExpression?

I mean select and show features inside a geometry object.

My FeatureLayer is a huge layer server side.

Thanks

Massimiliano

Re: Spatial condition in FeatureLayer.definitionExpression?

AnneFitz — Fri, 03 Apr 2020 16:46:55 GMT

Hi Massimiliano,

Instead of using definitionExpression, try using FeatureLayer.queryFeatures(). See this section in the API Reference on Spatial Queries for more information: Spatial Query | ArcGIS API for JavaScript 4.14

Here's a sample that shows querying statistics by geometry: SceneLayerView - query statistics by geometry | ArcGIS API for JavaScript 4.14

Hope this helps!

Thanks,

Anne

Re: Spatial condition in FeatureLayer.definitionExpression?

MassimilianoSantini — Sat, 04 Apr 2020 09:44:02 GMT

Hi Anne,

and so I did but I wanted to avoid creating a new client side layer.

However I used QueryTask to perform the spatial selection, is it the same in terms of performance as FeatureLayer.queryFeatures() ?

thank you

Massimiliano

Re: Spatial condition in FeatureLayer.definitionExpression?

AnneFitz — Mon, 06 Apr 2020 16:08:17 GMT

Yes, they are the same in terms of performance, assuming that your FeatureLayer is created from a service. But it is probably better to just use FeatureLayer.queryFeatures() so that you do not have to import another task.