topic Re: customize layer labels in ArcGIS JavaScript Maps SDK Questions

customize layer labels

EvonFranklin — Sat, 11 Dec 2021 11:56:40 GMT

How do i customize layer labels from a MapImageLayer? current layer code below

 var resultsLabelLayer = new MapImageLayer({
                  url: url,
                   sublayers: [{
                                id: 1,
                                labelsVisible: true,
                                visible: true,
                                labelingInfo: [{
                                              labelExpression: "[CONST]",
                                              labelPlacement: "always-horizontal",
                                              symbol: new TextSymbol({
                                                color: [ 255,255,255,1 ],
                                                font: {
                                                  size: 16,
                                                  weight: "bolder"
                                                }
                                              })
                                            }]
                              }]
           });  ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍
map.add(resultsLabelLayer);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Using this and adding the layer to the map yields no labels or the layer being drawn

Re: customize layer labels

RobertScheitlin__GISP — Tue, 17 Jan 2017 14:13:49 GMT

Evon,

This sample shows some of the parameters that can be customized:

MapImageLayer - label sublayer features | ArcGIS API for JavaScript 4.2

Re: customize layer labels

EvonFranklin — Tue, 17 Jan 2017 15:24:58 GMT

That is exactly the document I was following, still to no success to display any labels. There may be more to this but I get no error in console.

Re: customize layer labels

RobertScheitlin__GISP — Tue, 17 Jan 2017 15:38:40 GMT

Evon,

Strange it works fine for me.

Re: customize layer labels

EvonFranklin — Tue, 17 Jan 2017 15:50:36 GMT

I updated my question with the code I am using, I tried a hard refresh on the browser still no use. I do have a layer on my service that is not enabled however I am not sure if that is causing an issue. i disabled the other layers and only have visible set to the layer i want to label.

Re: customize layer labels

thejuskambi — Tue, 17 Jan 2017 15:58:08 GMT

Hello Evon,

You snippet does not have the id property in it. All the sample snippet has the id value, which will provide the information on which sublayer, the changes needs to be applied to.

Have you tried adding the "id" property?

Warm Regards

Re: customize layer labels

MichaelVolz — Tue, 17 Jan 2017 16:02:20 GMT

When did the MapImageLayer object become available in the JS API (version)?

Re: customize layer labels

EvonFranklin — Tue, 17 Jan 2017 16:03:01 GMT

thanks for your observation, I have left it out while testing something but I have added it in my code snippet above.

Re: customize layer labels

EvonFranklin — Tue, 17 Jan 2017 16:04:14 GMT

Since 4.2 I assume

Re: customize layer labels

thejuskambi — Tue, 17 Jan 2017 16:17:05 GMT

And it still doesn't work?

Have you enabled the Supports Dynamic Layers for the map service?

Re: customize layer labels

EvonFranklin — Tue, 17 Jan 2017 16:48:40 GMT

Is this mandatory in order to change the labels client side?

Re: customize layer labels

thejuskambi — Tue, 17 Jan 2017 17:29:07 GMT

I think that MapImageLayer is using the functionality provided by Dynamic Layer of the Map Service. Because of which you are able to change the symbology, label and other details of a MapService. It is similar to LayerDrawingOptions in 3.x version. I couldn't find any documentation though. I checked the service used in the sample and they have the Dynamic Layer support enabled.

Its worth a try.

Re: customize layer labels

EvonFranklin — Tue, 17 Jan 2017 17:49:26 GMT

True worth a try, I will look into turning this on.

Re: customize layer labels

EvonFranklin — Tue, 17 Jan 2017 19:10:49 GMT

Turns out that does the trick, after consulting the manager and enabling this feature. Thanks for your advice I would not have picked that up from the examples myself.

Re: customize layer labels

MichaelVolz — Tue, 17 Jan 2017 19:13:49 GMT

It would be nice if the sample told you that this was a required setting for your service to work.

Re: customize layer labels

Phaelipticus2 — Fri, 26 May 2023 16:01:13 GMT

Guys,

I´m using 4.15 version.

I´m trying to show the server-side labels on the view but only works with FeatureLayer. But I need to show sublayers on the menu widget, that´s why I have to use MapImageLayer.

There is no problem with my code because I can see the layer in the view. Supported Dynamic Layers = true and put ID on MapImageLayer as well. Checked hundreds of times. I tried what you guys said.

Anyone have a clue? Is that the 4.15 version to old for MapImageLayer?

Can anyone help? Thanks!