Contents
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 create an array of markers in Google Maps?
// create an array of markers based on a given “locations” array. // The map () method here has nothing to do with the Google Maps API. // Add a marker clusterer to manage the markers. Note: Read the guide on using TypeScript and Google Maps. const map = new google. maps. Map ( document. getElementById ( “map” ), {
Where can I find the marker clustering library?
The marker clustering library is part of the open source map utilities on GitHub. You can access all of the code and even make changes if needed. Let’s take a high-level look at how the algorithm works. To begin, the algorithm divides the map into a grid, with each section of the grid defaulting to 60×60 pixels.
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 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 does spiderfier work on Google Maps version 3?
This library makes map markers in the Google Maps API (version 3) behave in that Google Earth way (minus the animation). Small numbers of markers (yes, up to 8) spiderfy into a circle. Larger numbers fan out into a more space-efficient spiral.
How does overlappingmarkerspiderfier work in Google Earth?
By default, the OverlappingMarkerSpiderfier works like Google Earth, in that when you click a spiderfied marker, the markers unspiderfy before any other action takes place. Since this can make it tricky for the user to work through a set of markers one by one]
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.
Is there a way to remove markers from marker clusterer?
Just for anyone who is searching on the internet for actual answer (since this question is very old): this will remove all markers in markerCluster. Everything can be found here: https://googlemaps.github.io/js-marker-clusterer/docs/reference.html¨ js-marker-clusterer has moved and the old repo is no longer maintained.