Contents
How does clustering work in Google Maps JavaScript?
It creates a cluster at a particular marker, and adds markers that are in its bounds to the cluster. It repeats this process until all markers are allocated to the closest grid-based marker clusters based on the map’s zoom level.
How are markers added to a cluster in JavaScript?
If markers are in the bounds of more than one existing cluster, the Maps JavaScript API determines the marker’s distance from each cluster, and adds it to the closest cluster. You can set a MarkerClusterer option to adjust the cluster position to reflect the average distance between all the markers that are contained within it.
How to display HTML clusters with custom properties?
This advanced example uses Mapbox GL JS clustering with HTML markers and the custom property expressions number-format, get, !=, >, >=, all, and case. You can use HTML or SVG for clusters in place of a Mapbox GL layer by manually synchronizing the clustered source with a pool of marker objects that updates continuously while the map view changes.
How to cluster data points on a map?
As the user zooms into the map, the clusters break apart into their individual data points. When you work with large number of data points, use the clustering processes to improve your user experience. Enable clustering in the DataSource class by setting the cluster option to true.
How does the marker clustering work in maps?
When the user zooms out, the markers gather together into clusters, to make viewing the map easier. The marker clustering utility is part of the Maps SDK for Android Utility Library. If you haven’t yet set up the library, follow the setup guide before reading the rest of this page.
How are the markers grouped in Google Maps?
But for the sake of clarity, this document will name them ‘markers’ throughout. When a user views the map at a high zoom level, the individual markers show on the map. When the user zooms out, the markers gather together into clusters, to make viewing the map easier.
How to change the clusterrenderer in Google Maps?
You can change the ClusterRenderer and the Algorithm using the setAlgorithm (Algorithm algorithm) and setRenderer (ClusterRenderer view) methods of ClusterManager. You can implement ClusterRenderer to customize the rendering of the clusters. DefaultClusterRenderer provides a good base to start from.
How to add a marker clusterer to Google Maps?
Follow the steps below to add a marker clusterer: Get the marker clustering library and images from GitHub, and store them on a server accessible to your app. The JavaScript library and image files for the MarkerClusterer are available in the Google Maps repo on GitHub. Add the marker clustering library to your page.
How to count the number of markers in a cluster?
From that information, the marker clusterer library takes over and displays the cluster icon with a count of the number of points contained in the cluster: Click on the cluster icon and the map bounds will zoom to the level where both markers are visible:
How to cluster Google Maps KML overlays?
The KML file is actually read by a Google server, then served to the map as image tiles. Thus, you don’t have access to the actual point objects. If you want to do clustering, you would have to load the KML another way and parse the points into an array, and then you can use whatever client-side clustering you want.