topic Re: Dynamic Placement of Polygon Labels in ArcGIS JavaScript Maps SDK Questions

Dynamic Placement of Polygon Labels

JeffreyThompson2 — Wed, 20 Dec 2023 15:12:16 GMT

I have a polygon FeatureLayer with labels turned on. The labels appear to be fixed in position at the centroid of the polygon.

I would like them to reposition themselves, so that the label is always visible regardless of the zoom level. So a zoomed in view like this is still labeled.

Is this supported by the API? According to the documentation, the only polygon label placement option is 'always-horizontal'. https://developers.arcgis.com/javascript/latest/api-reference/esri-layers-support-LabelClass.html#labelPlacement

This seems like very basic behavior so I'd be surprised if it's not supported. Any suggestions or work-arounds?

Re: Dynamic Placement of Polygon Labels

SaurabhUpadhyaya — Thu, 21 Dec 2023 05:11:34 GMT

I am also facing the same issue, trying to fixe the label position dynamically.

Also facing the issue, label text is not displaying correctly in print map. Can anyone suggest .

Re: Dynamic Placement of Polygon Labels

JeffreyThompson2 — Mon, 05 Feb 2024 21:57:13 GMT

I have developed a workaround. The FeatureLayer in my case is created from a MapImageLayer and a MapImageLayer does handle dynamic repositioning. I have used the MapImageLayer to effectively create a layer that only contains labels and loaded it to my map as well as the FeatureLayer which handles all the other attributes on the map.

This creates a MapImageLayer with only the sublayer I want and hides everything but the labels.

//Label only mapImageLayer const mapImage = new MapImageLayer({ url: 'url', listMode: hide, sublayers: [ { id: 8, legendEnabled: false, listMode: 'hide', opacity: 0 } ]

I gave my FeatureLayer a LabelClass with a labelExpressionInfo of an empty string to trick it into thinking it's doing the labeling.

labelClass: [ { labelExpressionInfo: { expression: ' ' }, symbol: { type: 'text', color: 'black', font: { family: 'Noto Sans', size: 7, weight: 'normal' } }, labelPlacement: 'always-horizontal' } ]

And I used reactiveUtils to turn on/off the MapImageLayer when the layer it is tied to or its labels are turned on/off.

sublayer8 = mapImage.findSublayerById(8) feature8 = jimuMapView.view.map.findLayerById('featureLayer8') reactiveUtils.watch(() => [feature8?.visible, feature8?.labelsVisible], ([visible, labels]) => { if (visible && labels) { sublayer8.visible = true } else { sublayer8.visible = false } })

Re: Dynamic Placement of Polygon Labels

NicolasGIS — Fri, 27 Jun 2025 11:33:37 GMT

Chiming in...

Facing the same limitation. As suggested in:

https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/road-map-for-repeating-labels-for-polygons/m-p/1626169#M87277

I created an idea:

https://community.esri.com/t5/arcgis-javascript-maps-sdk-ideas/add-support-for-repeating-labels-for-polygons/idi-p/1627722/jump-to/first-unread-message

Feel free to promote it with kudos !