topic Re: How to hide a map service layer? in ArcGIS JavaScript Maps SDK Questions

How to hide a map service layer?

ShaningYu — Tue, 15 Jan 2019 19:00:00 GMT

How to hide a map service layer? For a map service with 2 dozens of layers, I want to hide one of them from the TOC. Is there is an easy way to do it? Thanks.

Re: How to hide a map service layer?

TimMcGee1 — Tue, 15 Jan 2019 20:33:48 GMT

An example of this is provided in the demo code: cmv-app/viewer.js at develop · cmv/cmv-app · GitHub

Re: How to hide a map service layer?

Noah-Sager — Tue, 15 Jan 2019 21:54:09 GMT

Shaning Yu if you're using a MapImageLayer, then you can define the visibility of the sublayer (map service layer).

Doc:

Sublayer | API Reference | ArcGIS API for JavaScript 4.10

Sample:

MapImageLayer - Toggle sublayer visibility | ArcGIS API for JavaScript 4.10

Re: How to hide a map service layer?

ShaningYu — Wed, 16 Jan 2019 13:49:52 GMT

Tim: Thanks for your response. I use the code:

imageParameters: buildImageParameters({ ...

but got runtime error: JavaScript runtime error: 'buildImageParameters' is undefined

I DO use "http://js.arcgis.com/3.27compact/" as you do. But, for an unknown reason, this api can't be loaded in index.heml's <head></head> block, or else, the page can't be loaded. In the <head></head> block,I load several other api's (e.g. jquery and bootstrap's api).

This api has to be loaded after the dojoConfig like below, the the apge can be loaded properly.

<script type="text/javascript">
    var dojoConfig = {
        async: true,
        packages: [{
            name: 'viewer',
            location: location.pathname.replace(/[^\/]+$/, '') + 'js/viewer'
        }, {
            name: 'config',
            location: location.pathname.replace(/[^\/]+$/, '') + 'js/config'
        }, {
            name: 'gis',
            location: location.pathname.replace(/[^\/]+$/, '') + 'js/gis'
        }]
    };
</script>
<script type="text/javascript" src="http://js.arcgis.com/3.27compact/"></script>

Could you provide your advisory to solve this problem? Thanks.

Re: How to hide a map service layer?

ShaningYu — Wed, 16 Jan 2019 15:57:06 GMT

I got runtime error when I use API 4.1. The problem may be the same as using 3.27 version. This could be the problem as I load several other API's that may cause some unknown conflicts. Thanks.

Re: How to hide a map service layer?

ShaningYu — Wed, 16 Jan 2019 16:20:20 GMT

I did another try by adding the function locally

The 'Not found' error is gone. But with the defined

layerIds: [1,2,3,4,5],

layerOption: ImageParameters.LAYER_OPTION_EXCLUDE

the layer 0 still in the TOC. What's wrong in my code? Thanks.