topic Re: Labels for KML Layers in ArcGIS JavaScript Maps SDK Questions

Labels for KML Layers

MichaelLacy — Sun, 12 Dec 2021 16:21:13 GMT

Hi, adding a KMLLayer to the map doesn't seem to display any labels. (There was a similar question about this, but it is a few years old and never really answered.) Anyway, since KML layers are converted to feature layers, I thought I could set the labeling info on the constituent feature layers by doing something like this:

kmlLayer.on("load", function() {     
    var labelingInfo = [{
        "labelExpressionInfo": {
            "expression": "$feature.name"
        },
        "labelPlacement": "below-right"
    }];
    var layers = kmlLayer.getLayers();
    for (var i = 0; i < layers.length; i++) {
        if (layer instanceof FeatureLayer) {
            layer.setLabelingInfo(labelingInfo);
        }
     }
});

I don't get any errors if I do this, but I also don't get any labels. Should this work for the feature layers created from a KML layer? If not, is there a correct way to add labels to KML layers?

Thanks,

Mike

Re: Labels for KML Layers

RobertScheitlin__GISP — Sat, 11 Dec 2021 15:48:24 GMT

Mike,

This is what worked for me in the past:

layer.on("load",  lang.hitch(this, function()  {
  var json = {
    "labelExpressionInfo": {
      "value": "{name}"
    },
    "useCodedValues": false,
    "fieldInfos": [{
      fieldName: "name",
    }]
  };
   var layers = layer.getLayers();
   //create instance of LabelClass
   var lc = new LabelClass(json);
   lc.symbol = new TextSymbol();
   layers[0].setLabelingInfo([lc]);
 }));‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: Labels for KML Layers

MichaelLacy — Tue, 04 Apr 2017 20:51:53 GMT

Ugh! Stupid error on my part. I didn't have "showLabels: true" when creating the map. What I had works now.

Re: Labels for KML Layers

igemetristechnologies — Wed, 24 Mar 2021 07:24:10 GMT

Hello. This post is pretty old, but I'm interested in it.
I'm loading a KML file given by URL at startup (only from given domain).
I tried this code in order to auto-display label, but it doesn't work.
I lost pretty much time with this, but could not find a solution.

I guess I should use GeoJSON in order to create better "drawings", but if you have an idea what could be missing... ?

Best regards

hasLabels is true
showLayers is true
labelingInfo seems to be ok

labelingInfo: Array(1)

fieldInfos: [{…}]

labelExpressionInfo: {value: "aaa {name}"}

labelPlacement: null

symbol: {type: "textsymbol", x: 0, y: 0, text: "", rotated: false, …}

useCodedValues: false

__proto__: Object

length: 1