topic Re: Spatial Join in ArcGIS JavaScript Maps SDK Questions

Spatial Join

TheGamer — Wed, 26 Apr 2023 20:28:35 GMT

So, I have created a simple tool that converts an address into lat and long coordinates. I was wondering if there is an api which can use coordinates against a feature layer to see which polygon it belongs to using spatial join?

I basically want to map the coordinates to several hosted layers and get the polygon name which it maps to.

Re: Spatial Join

Sage_Wall — Mon, 24 Apr 2023 21:18:33 GMT

Hi @TheGamer ,

I'd suggest using the coordinates from your tool for the address to perform a spatial query on the feature layer. More information on the Query class can be found here:

https://developers.arcgis.com/javascript/latest/api-reference/esri-rest-support-Query.html

There is also a convenient method to use to create a new query object from a feature layer documented here:

https://developers.arcgis.com/javascript/latest/api-reference/esri-layers-FeatureLayer.html#createQuery

Re: Spatial Join

TheGamer — Fri, 05 May 2023 15:31:46 GMT

Hi, is there a way to check if the graphic contains the centroids of a feature layer?

Re: Spatial Join

BlakeTerhune — Fri, 05 May 2023 16:46:16 GMT

@TheGamer Yes, use the geometryEngine.

Re: Spatial Join

TheGamer — Wed, 07 Jun 2023 16:57:53 GMT

Hi @BlakeTerhune I can't find the method, I want to get the ids of the feature layer whose centroids are in the graphic

Re: Spatial Join

BlakeTerhune — Wed, 07 Jun 2023 19:38:14 GMT

I think the contains method is what you would use. While looping over the features in the feature layer, test contains and then look at the attributes of the current feature and grab the id when you get a true.