nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

How to highlight when when dealing with MapImageLayer

gpei_ahuang

I have a feature class that I applied complex labelling rules. In order for those labelling rules to translate on a map, I had to publish the feature class as a MapImageLayer. I have search for the javascript equivalent labellingInfo setting but it seems that they do not existing yet in the 4.x JS library.

Right now, I am dealing with highlighting by creating individual graphics and added it either into a graphics layer or MapView.graphics. Is there a native way such as layerView.highlight() for MapImageLayer?

Vind meer berichten getagd met

Accepted answers

All comments

AndreV

Thanks @WongChunKang for posting this snippet. This helped me a lot in 2D. Unfortunately in 3D I get an layerView with type="map-image-3d" which does not support highlight function. Any hints on that? Is this a bug or net yet implemented?

WongChunKang

The following hack worked for me

// Tested in ArcGIS JS SDK 4.27.6

const map = new Map({ ... });
const view = new MapView({ ... });
const mapImageLayer = new MapImageLayer({ ... });

map.add(mapImageLayer);
await mapImageLayer.load();

// In TypeScript, be prepared to use `any` type from here onwards
const layerView = view.layerViews.find((lv) => lw.layer.id === mapImageLayer.id);
layerView.highlight([ ... ]); // An array of Graphic object

gpei_ahuang

There is still no solution specific to highlighting MapImageLayer. I don't think highlighting for MapImageLayer is part of the core function.

I ended up adding another the feature class layer from the MapImageLayer that I want highlight:

- remove all the labels

- redefine the rendering symbology

- define definitionExpression to use as a filter or (layerView.filter if you offload processing on client side)

- visible: false to start and toggle on and off as needed to visualize highlight

nadja

Hi @gpei_ahuang

Have you found a solution yet? I'm having the exact same question.

gpei_ahuang

I was considering overlaying the same layer again just for the highlighting purpose. But with the amount of rendering involved, the map would be very inefficient.

LukeCalladine

Ah okay, no worries - if it helps I think I handle my highlighting of MapImageLayers in a similar same way by managing the related Graphics - I would interested if there is a native way, but I doubt it...

gpei_ahuang

Hi Luke

Thanks for writing back. Unfortunately, that is not what I am looking for.

I'm looking for highlighting methods similar to FeatureLayerView.highlight() but for LayerView create for MapImageLayer.

I have explored directly changing labellingInfo but it just does not have the same parameters that produces the same labelling results. That is why I am using MapImageLayer for my map to retain the labelling parameters I defined in ArcGIS Pro.

LukeCalladine

Forgive me if I am misunderstanding - would you be looking to use the labellingInfo setting in the Sublayer class for a MapImageLayer?

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

Doe mee aan het gesprek

Aangemelde leden kunnen berichten plaatsen, updates volgen en meer. Nieuw hier? Registreer een gratis account.

Snelle Links

Community Help
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.