FeatureLayer.setMaxAllowableOffset doesn't seem to do anything

BrettGreenfield__DNR_ — Sat, 11 Dec 2021 10:59:24 GMT

I've been experimenting with the maxAllowableOffset property to try to manage the load times of one of my feature services, except this method doesn't seem to do anything at all. When I inspect the feature layer object in my developers console, I don't even see a "maxAllowableOffset" property. If I run the javascript and look at the network requests I see "&maxAllowableOffset=x" in the query, where x ends up being the same regardless of what I enter for the maxAllowableOffset property when creating the feature layer object (x does change as you zoom in and out, though).

Just to be sure there wasn't something weird in my map I created a very basic sample map with one of ESRI's feature layers to test this.

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"/>
    <title>Simple Map</title>
    <link rel="stylesheet" href="https://js.arcgis.com/3.23/esri/css/esri.css">
    <style>
      html, body, #map {
        height: 100%;
        margin: 0;
        padding: 0;
      }
    </style>
    <script src="https://js.arcgis.com/3.23/"></script>
    <script>
      require(["esri/map", "esri/layers/FeatureLayer", "dojo/on", "dojo/parser", "dojo/domReady!"], function(Map, FeatureLayer, on, parser) {
       
          parser.parse();
       
        map = new Map("map", {
          basemap: "topo",
          center: [-95.45, 37.75],
          zoom: 5
        });
          
        featureLayer = new esri.layers.FeatureLayer("https://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer/3", { maxAllowableOffset: 5000 });
          
          map.addLayer(featureLayer);
          
          function calcOffset() {
               console.log(map.extent.getWidth() / map.width);
               return (map.extent.getWidth() / map.width);
          };
          
          on(map, "zoom-end", function() {
               maxOffset = calcOffset();
               featureLayer.setMaxAllowableOffset(maxOffset);
          });
          
      });
    </script>
  </head>

  <body>
    <div id="map"></div>
  </body>
</html>
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Just for kicks, I also tried setting the maxAllowableOffset through the .setMaxAllowableOffset method instead of setting it when creating the feature layer object itself, and the results were the same.

Has anyone gotten this to work?

Re: FeatureLayer.setMaxAllowableOffset doesn't seem to do anything

RobertScheitlin__GISP — Sun, 04 Feb 2018 01:33:36 GMT

Brett,

The Feature layer is already doing a generalization based on the extent because of.

AutoGeneralize:

Enable or disable the auto generalization of features from a non-editable layer in on-demand mode. When true, the layer uses the current map resolution as the maxAllowableOffset for all queries issued to the server. The default value is true. As of v2.7

Re: FeatureLayer.setMaxAllowableOffset doesn't seem to do anything

BrettGreenfield__DNR_ — Mon, 05 Feb 2018 13:22:00 GMT

Ah! How obvious. Thank you!

topic Re: FeatureLayer.setMaxAllowableOffset doesn't seem to do anything in ArcGIS JavaScript Maps SDK Questions

FeatureLayer.setMaxAllowableOffset doesn't seem to do anything

Re: FeatureLayer.setMaxAllowableOffset doesn't seem to do anything

Re: FeatureLayer.setMaxAllowableOffset doesn't seem to do anything