How is point clustering implemented in ArcGIS JavaScript?

How is point clustering implemented in ArcGIS JavaScript?

Point clustering has been implemented in this sample with a custom layer named extras.ClusterLayer. This custom layer subclasses esri.layers.GraphicsLayer. Symbology for clusters is managed using renderers. A class breaks renderer is recommended.

How to improve the featurereductioncluster API for JavaScript?

Increase the clusterMinSize to fit labels inside smaller clusters (16pt is a good starting point when labels are visible). If the layer’s renderer has a SizeVariable, increase the size of the smallest features (either in the variable stops, or in the minSize property) to improve the cluster visualization, and so labels can fit inside the clusters.

Which is the custom layer for point clustering?

This custom layer subclasses esri.layers.GraphicsLayer. Symbology for clusters is managed using renderers. A class breaks renderer is recommended. For constructor options, public properties as well as layer methods, please refer to the comments in the ClusterLayer.js file.

When to adjust clusterradius in esri.folder?

Adjusting clusterRadius generally should be considered if the clusterMaxSize is modified. For example, if you prefer cluster icons to not overlap, then the clusterRadius should be substantially larger than the clusterMaxSize. The name of the class. The declared class name is formatted as esri.folder.className.

How does featurereductioncluster class work in JavaScript?

This class configures clustering as a means of reducing and summarizing point features in a FeatureLayer , CSVLayer , GeoJSONLayer or OGCFeatureLayer . This feature reduction method spatially groups points into clusters based on an area of influence, or clusterRadius.

How is the size of a feature reduction cluster determined?

This feature reduction method spatially groups points into clusters based on an area of influence, or clusterRadius. The size of each cluster is proportional to the number of features within the cluster.

How is a featurelayer created in ArcGIS Online?

A FeatureLayer is a single layer that can be created from a Map Service or Feature Service; ArcGIS Online or ArcGIS Enterprise portal items; or from an array of client-side features. The layer can be either a spatial (has geographic features) or non-spatial (table).

How is symbology managed in point clustering?

Symbology for clusters is managed using renderers. A class breaks renderer is recommended. For constructor options, public properties as well as layer methods, please refer to the comments in the ClusterLayer.js file. If using IIS as your web server, please configure your IIS instance to serve JSON.

How to create a layer list in ArcGIS?

If you are interested in creating a layer list automatically from all the layers in the map service, see the sample Dynamically create layer list. “dojo/domReady!” //Use the ImageParameters to set the visibleLayerIds layers in the map service during ArcGISDynamicMapServiceLayer construction. //in this application layer 2 is always on.

How to change visibility of a layer in ArcGIS?

The function updateLayerVisibility() contains the logic that turns the layers on and off. It loops through each layer in the list, records whether the layer should be visible depending on the checkbox status, and updates the visibility accordingly using ArcGISDynamicMapServiceLayer.setVisibleLayers().