topic Removing a Feature Layer? in ArcGIS JavaScript Maps SDK Questions

Removing a Feature Layer?

BrettGreenfield__DNR_ — Tue, 05 Jun 2012 18:28:35 GMT

Is there a way to do this? I can remove layers added as dynamic or tiled map services, but I can't remove layers added as a Feature Layer (unless I use .removeAllLayers, which of course gets rid of everything, which I don't want).

Why doesn't .removeLayer work with Feature Layers?

Re: Removing a Feature Layer?

JenniferGaa — Tue, 05 Jun 2012 19:12:46 GMT

Can you post some code that shows how you are trying to remove your feature layer?

I use a feature layer that is populated by a web service using a feature collection/layer definition. I keep my featureLayer variable as a global and then am able to use removeLayer(featureLayer) to remove it from the map and re-add it as needed.

Re: Removing a Feature Layer?

BrettGreenfield__DNR_ — Sat, 11 Dec 2021 06:11:26 GMT

Thanks for the reply Jennifer - fortunately, I figured it out!

 var map;
 var oysterLayers;
 
    function init() {
   var extent = new esri.geometry.Extent({"xmin":409914.00497589994,"ymin":104607.44204058842,"xmax":482562.42004832183,"ymax":141217.9675552771,"spatialReference":{"wkid":26985}})
      map = new esri.Map("map",{extent:extent});
   
   var baseMap = new esri.layers.ArcGISTiledMapServiceLayer("http://www.mdimap.us/ArcGIS/rest/services/ImageryBaseMapsEarthCover/MD.State.MDiMap_Gazetteer83M/MapServer");
      map.addLayer(baseMap);
   oysterLayers = new esri.layers.FeatureLayer("http://www.mdimap.us/ArcGIS/rest/services/Biota/MD.State.BayOysters/MapServer/0"); 
   
 }
 
 function toggle(form) {
  if (form.checkThis.checked) {
   map.addLayer(oysterLayers)
  } else {
   map.removeLayer(oysterLayers)
  }
 }

The layer I was trying to toggle with a checkbox was the one defined by the oysterLayers variable. I had originally defined that variable under the toggle function; for some reason when doing that, I could add the layer via the checkbox, but not remove it. Any idea why that's the case? I'm still quite new to JavaScript so I'm not able to see why that wouldn't work.