With this example, you can test MarkerClusterer with different max zoom levels, grid size and styles, all the options. This example will compare adding markers with MarkerClusterer to the normal method of adding markers, and display the time for each.
LatLng Map document. Show Example Speed Test This example will compare adding markers with MarkerClusterer to the normal method of adding markers, and display the time for each. Name Type Description gridSize number The grid size of a cluster in pixels. Name Type Description url string The image url. LatLngBounds google.
LatLngBounds Extends a bounds object by the grid size. Map Gets the google map that the clusterer is associated with. Gets the array of markers in the clusterer.
Marker boolean Removes a marker from the cluster. Useful for moving markers. Map None Sets the google map that the clusterer is associated with. Marker Cluster Returns the marker clusterer that the cluster is associated with. Back to top. MarkerClusterer map:google. The minimum number of markers to be in a cluster before the markers are hidden and a count is shown. Forces a refresh of clusters by calling resetViewport and redraw while avoiding flickering.By clustering your markers, you can put a large number of markers on a map without making the map hard to read.
The marker clustering utility helps you manage multiple markers at different zoom levels. 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. The demo app provides a sample implementation of the marker clustering utility. Run the demo app shipped with the utility library by using one of these two methods:. Choose either Swift or Objective-C when prompted. CocoaPods updates your spec repositories, then opens the demo in a temporary Xcode project named SwiftDemoApp.
If you haven't yet set up the library, follow the setup guide before reading the rest of this page. The following code defines a point of interestthe POIItem class, representing the markers to be managed in clusters on the map:. The library includes default implementations of the cluster algorithm and renderer.
The following code randomly generates cluster items POIs within the scope of the map's camera, then feeds them to the cluster manager:.
You can listen to map eventsbut you can't listen to the type-safe cluster manager events. When the user taps a marker, an individual cluster item, or a cluster, the API triggers mapView:didTapMarker: and attaches the extra cluster data to the marker. You can use conformsToProtocol to check what the user tapped. Typically, you implement both these protocols in the view controller that displays the map.
Then call clusterManager. The cluster manager now intercepts any events that you've implemented on clusterManager. It forwards any remaining events to the map delegate, if provided. Note that events for standard markers that is, markers not generated by the cluster renderer are always forwarded to the map delegate.
You can base your custom implementation on the sample implementation of these protocols included in the utility library, or you can code a fully custom implementation by fulfilling the protocols. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4. For details, see the Google Developers Site Policies. Routes Directions API. Places Places API. Get started Contact sales. Creating a Map. Styling your Map. Interacting with the Map.
Drawing on the Map. Utility Library. Quick start The demo app provides a sample implementation of the marker clustering utility.In the previous post we've covered the basics of interacting with Google Maps. There's much more to be covered, but hopefully, you've learned enough to get started on your own. Today, we're going to learn how to cluster markers. Consider a very simple scenario where you have more than 20 markers in a small region as below:.
Displaying too much information to the user is far from being user friendly. Luckily, we can display the following map instead:. Create a new project from console.
Google Maps Android Marker Clustering Utility
We're going to use static data for today's post. Each data point represents a restaurants geographic location lat and lng and the it's name. Since the data is saved in an assets file, we simply need to read the data and put it in a JSONArray as follows:. You can check the following post for a detailed overview on assets. Now we're going to create a helper method to read the data from the JSONArray, create marker objects and add them to the map:.
This is the traditional way of doing things. Now it's time to cluster the markers to make it easier for our users to navigate the map and grasp the displayed data more easily.
In order to cluster markers, we use ClusterItem. They act as our markers. A ClusterItem has three methods to implement:. If, for whatever reason, you want to change the values such as cluster size, then you have to inherit from the class override whatever it is that you want.
By default, the renderer groups 5 markers or more. For today's post, we're going to render every marker that's optional, I prefer having all markers rendered as clusters.
So when we create our class, the generic T must be of type ClusterItem. Below is an example of how to create an instance of MarkerClusterRenderer :. We're going to declare the variable in our MainActivity :. Now we need to set our custom renderer that we've created MarkerClusterRenderer :. So, once we add the items, we don't actually need to add the markers to our map again. Now for the final issue, only one cluster is displayed. Again, the solution for that is a single line of code.
Just clustering our markers is not enough. Remember that the purpose of markers for Google Maps is to encourage user interaction.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again.
If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. Please note: This repository is kept for historical purpose only - the current version of marker clusterer is available as part of the v3-utility-library repository. Reference documentation. Download or clone markerclusterer. To use your own custom cluster images just name your images m. Examples page. Want to contribute? Check out the contributing guide!
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How to cluster map markers
Go back.As the number of markers increase, though, the map can become cluttered. If you have a high number of markers and a low zoom level, all of the markers can mash into one big blob of useless markers. This is where the concept of marker clustering comes into play, which can be achieved using the Google Maps Marker Clusterer Library :.
Marker clustering will automatically merge nearby markers into a single marker that will detail how many nearby markers there are. As you zoom in, these combination markers will separate into increasingly small clusters until you are back down to single markers again.
As you can see above, this can turn what would be a cluttered and hard to digest map, into one that is visually pleasing and useful. In this tutorial, we are going to walk through how to add marker clustering to a Google Map in an Ionic 2 application.
Since I have already covered it in a previous tutorial, I will not be discussing how to set up Google Maps in detail. I will supply all the code you need, but if you would like an explanation of how it all works I would recommend reading Creating an Advanced Google Maps Component in Ionic 2.
Before you go through this tutorial, you should have at least a basic understanding of Ionic 2 concepts. You must also already have Ionic 2 set up on your machine. If you want a much more detailed guide for learning Ionic 2, then take a look at Building Mobile Apps with Ionic 2. We are also going to need to do a little more setting up. We will be using two custom providers to help with the basic Google Maps implementation, and we will also be using another provider to deal with the clustering.
This is just for demonstration, so you will likely want to modify this in your own application. We should have a basic implementation of the map working now, so we can just focus on getting our marker clustering working. This is a reasonably simple provider. In our constructor we are just setting up a bunch of locations using their latitude and longitude — later we convert all of these into Google Maps markers by using the map method on the array.
If you are not sure how mapping works, you can take a look at this tutorial or the video I created about filtering, mapping, and reducing arrays it is very useful to know.
Then we just have a single function called addCluster which takes in a Google Map as a parameter. It creates those markers from the locations array and then creates a new MarkerClusterer object.
We need to supply the map we want to add the clusters to, the markers we want to add, and the images we want to use for the cluster icons. You will need to add the m1. You can either grab them from the source code for this tutorial below, or directly from the library on GitHub. All we have left to do now is trigger that addCluster function and supply it the map. If you take a look at home.
This calls the init function on the Google Maps service which handles setting up our basic map, but it also returns a Promise that resolves with a reference to the map that was loaded once it has finished loading.
The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Is there a possibility in the best case: a library that clusters different markers from the same area in relation to the zoomlevel? For others who are looking for implementing their own clustering code. Please check my clustering algo very fast and works amazingly good.
I looked at various libraries and found them so complex couldn't understand a word so I decided to make my own clustering algorithm. Here goes my code in java. Follow the steps below to create a simple cluster of ten markers. Looking at the steps in more detail: To create our simple cluster of ten markers, first create a MyItem class that implements ClusterItem. In your map activity, add the ClusterManager and feed it the cluster items.
For who is having troubles with Clusterkraf I can't make it work! It can easily handle markers on the map. Learn more. Asked 7 years ago.Clustering data in Google Maps and React
Active 2 years, 3 months ago. Viewed 43k times. Charles Greeny Greeny 1, 2 2 gold badges 15 15 silver badges 24 24 bronze badges. Active Oldest Votes. Intrications Intrications This is for Google Map v1. We cannot use v1 for a new app anymore.
Why do you think it is for v1? When I visit the dev-google pages you wrote. They said "v1 Key is not available" So I thought that information is about only v1. So, I can adjust this solution to my v2, right? I will try it.
Thank you for your information. Bytecode Have you reported this as an issue at github.Have you ever used a map with so many markers on it, that it was impossible to select the pin of interest? If only the pins in close proximity could be grouped together to make the map more user-friendly. This is known as Clustering, and yes it can be done. Clustering on Google Maps is really simple because there is an awesome library that helps us do this. The Google Maps Utils library. Note: This is assuming you have already set up a Google Map in your Android app.
To get this library, all we need to do is add it as a dependency in our build. This interface will provide marker data to our model. ClusterItem provides us with three methods that we need to implement:. This will make our model conform to what we need for the cluster manager, which is what we will look at next. In our Activity, we create a ClusterManager variable of the same Type as our model. Then in our onMapReady method or wherever you have access to your GoogleMap object :.
The addPersonItems function:. And there you go, you have clustering on your Google Map Activity! There is so much more you can do with clustering, and Google Maps. Stay tuned for more on Google Maps. For a more complete example of the above code, you can visit my Github page:. Let me know what you think in the comments. Thanks to Ashton Welcome and Joshua Leibstein for reviewing this post. Sign in. Archive About Submit your article. Google Map with Marker Clustering. Peter-John Welcome Follow.
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