topic Re: How to prevent point symbols from disappearing when overlapped with a label from another layer or basemap in ArcGIS JavaScript Maps SDK Questions

How to prevent point symbols from disappearing when overlapped with a label from another layer or basemap

AllenHuang — Wed, 15 Jun 2022 13:29:04 GMT

I have a simple map composed of only a point graphic (in mapView.graphics) on top of a polygon layer on/ top of an Esri basemap. At certain zoom levels I notice that when it's too close or overlap with a label from the polygon layer or basemap, it would disappear. Is there anyway to prevent this?

Re: How to prevent point symbols from disappearing when overlapped with a label from another layer or basemap

PeterDimitrov1 — Fri, 15 Jul 2022 08:58:55 GMT

Hi Allen,

Disabling deconfliction or using DYNAMIC_NEVER_REMOVE for the point feature label class should stop the label from disappearing.
https://developers.arcgis.com/java/api-reference/reference/com/esri/arcgisruntime/mapping/labeling/LabelDeconflictionStrategy.html

If you would like some more detailed control, you can also adjust label definition settings such as:
- Feature Boundary Overlap: https://developers.arcgis.com/net/api-reference/api/netwin/Esri.ArcGISRuntime/Esri.ArcGISRuntime.Mapping.LabelDefinition.FeatureBoundaryOverlapStrategy.html
- Feature Interior Overlap: https://developers.arcgis.com/net/api-reference/api/netwin/Esri.ArcGISRuntime/Esri.ArcGISRuntime.Mapping.LabelDefinition.FeatureInteriorOverlapStrategy.html
- Label Overlap:https://developers.arcgis.com/net/api-reference/api/netwin/Esri.ArcGISRuntime/Esri.ArcGISRuntime.Mapping.LabelDefinition.LabelOverlapStrategy.html

I hope that helps.

Re: How to prevent point symbols from disappearing when overlapped with a label from another layer or basemap

gpei_ahuang — Fri, 15 Jul 2022 13:31:03 GMT

Are there any similar solutions from the Javascript API?

Re: How to prevent point symbols from disappearing when overlapped with a label from another layer or basemap

PeterDimitrov1 — Mon, 25 Jul 2022 09:47:20 GMT

Hello,

I overlooked the fact you asked for JavaScript - the JavaScript API unfortunately only has limited support for deconfliction and no support for overlap. My apologies.
It would seem that in your case, it would be appropriate to experiment by setting deconfliction to `none`.

https://developers.arcgis.com/javascript/latest/api-reference/esri-layers-support-LabelClass.html#deconflictionStrategy

Kind Regards,
Peter

Re: How to prevent point symbols from disappearing when overlapped with a label from another layer or basemap

AllenHuang — Mon, 25 Jul 2022 11:05:06 GMT

Thanks Peter

I will give that a try.

Allen