How to get extents of sublayers of given MapImageLayer

Question

Hi, I have a MapImageLayer with a bunch of sublayers and want to perform spatial queries to get polygons that intersects among every two sublayers. How to get the extent of a sublayer to set a geometry of the query?

RobertScheitlin__GISP · Answer

Daniela,

Use the subLayer.url property to do a QueryTask and then use the QueryTask.executeForExtent method.

DanielaPetrova · Answer

I'm using ArcGIS JS API 4.10

There is the function I'm using by:

function spatialQuerySublayer(sublayer, extent) {    let spatialQuery = sublayer.createQuery()    spatialQuery.geometry = extent    spatialQuery.spatialRelationship = 'intersects'   spatialQuery.outFields = ['OBJECTID']   return layer.queryFeatures(spatialQuery) }

It is a spatial request of a sublayer against another sublayer, but I don't know how to take the extent of the sublayer which I do request againts

RobertScheitlin__GISP · Answer

Daniela,

You have to use a Query and queryTask on the sublayer url. Use QueryTask.executeForExtent:

https://developers.arcgis.com/javascript/3/jsapi/querytask-amd.html#executeforextent