topic Re: Symbol remains clustered when zooming in with Feature Reduction enabled in ArcGIS JavaScript Maps SDK Questions

Symbol remains clustered when zooming in with Feature Reduction enabled

FranklinAlexander — Fri, 06 Aug 2021 13:24:05 GMT

I am have Feature Reduction enabled on a layer and at some point when zooming in to a cluster it should break apart into single graphics. This does not happen for some clusters no matter how much I zoom in.

I tried changing the cluster radius, going as small as 20, but I get the same result. This appears to be happening for any cluster when the features are less than 1000 meters apart:

Here is the cluster as it appears in the app:

Here are the actual features as they should appear:

I need the single graphics to appear in the app because user need to be able to click the feature to get more info. Please let me know if there is a fix.

Re: Symbol remains clustered when zooming in with Feature Reduction enabled

rogenjh — Fri, 06 Aug 2021 17:40:30 GMT

You watch the scale and remove the feature reduction cluster at a certain scale.

You can see this happening on this example: Sample .

Key code:

layer .when() .then(generateClusterConfig) .then(async (featureReduction) => { // sets generated cluster configuration on the layer layer.featureReduction = featureReduction; // the layer view is needed for querying clusters layerView = await view.whenLayerView(layer); // Disable clustering when user zooms beyond a 1:50,000 scale level // Re-enable clustering when the user zooms out to a scale smaller than 1:50,000 view.watch("scale", (scale) => { layer.featureReduction = view.scale > 50000 ? featureReduction : null; }); }) .catch((error) => { console.error(error); });

Re: Symbol remains clustered when zooming in with Feature Reduction enabled

FranklinAlexander — Tue, 10 Aug 2021 11:59:03 GMT

Thank you for that suggestion. I am using the 3x API, so I had to adapt the code accordingly but it's working.