This tutorial shows you how to use marker clusters to display a large number of markers on a map. You can use the @googlemaps/markerclusterer library in combination with the Maps JavaScript API to combine markers of close proximity into clusters, and simplify the display of markers on the map.
To see how marker clustering works, view the map below. The number on a cluster indicates how many markers it contains. Notice that as you zoom into anyof the cluster locations, the number on the cluster decreases, and you begin to see the individualmarkers on the map. Zooming out of the map consolidates the markers into clusters again.
As a simple illustration, this tutorial adds a set of markers to the map using thelocations array. You can use other sources to get markers for your map.For more information, read the guide tocreating markers.
Follow the steps below to add a marker clusterer:
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HERE Maps API for JavaScript brings interactivity and rapid customization into your application development, with HERE maps as the foundation. Explore a growing database of 58 million mapped roads and 5 million map changes per day.
Provide turn-by-turn instructions for driving and walking in over 108 different languages. Let users set their own preferences, such as shortest and fastest routes, as well as restrictions like tolls and highways.
Store custom POIs or other data types with lat/long, shapes and geometries, and layers. Add your own POIs or shapes onto the map for visualization purposes (such as warehouses, truck shops, retail stores and offices).
Add multiple overlays for points, lines or areas with standard markers, DOM markers, clustering, geoshapes and meta information boxes that can be easily created from geographic coordinates. Import KML, GeoJSON and WKT data sets.
Did some more research and apparently this is a big issue for Wordpress plugin builders, too. Wordpress provides a function to dequeue scripts loaded by themes and other plugins: _Reference/wp_dequeue_script
Personally I thought the same in the start, For some reason building a plugin for bubble made me feel as if bubble held the responsibility for the potential issues around what may happen if two developers products clash. Its not the way it works when your building out a full lib or some speccy new SDK or self hosted self scripted server instances with your own set of plugin builders because you build with compatibility in mind at scale.
In the case I will show the google object that exists globally when you start playing with maps, autocomplete, places, bulk geo coding and so on, this is what I have done to make sure that my code wont cause any issue.
I built the Autocomplete plugin based on this and what i did was put the allClearLetsGo() function inside an append to head function wrapped in script tags. The method works and has been tested using both bubble and non bubble maps and other elements both visable, hidden and some appended after the fact. This was what I came up with when bubble asked me to ensure that the google based plugins would be able to coexist with core elements and other devs elements aswell. I wish i could just chuck the code here but its a private version for a client so unfortunately i cant. The good news is though i can say 100% i understand the issue but more to the point 100% that its solvable this way.
even if you wanted to stick to this method, wrap it in the allClear function finish it with a return result, append it to the head making sure the var is global and you will be able to have the one block callable throughout your plugin as allClear. That way you only have it once but its reachable where ever you call it.
You might be wondering why we should dig into Google Maps JavaScript API to build maps when we can use a Static Map instead, or use one of the available WordPress plugins to do it without the hassle of coding.
Of course, both are excellent options when you want to display some business location on your website. But Google Maps JavaScript API offers you more control for times when you want to build a custom map with more complexity than a pre-built plugin has to offer.
Once the Google Maps API loads, it calls the initMap function that initializes the map. If we break down our code even further, we use an empty div with an ID of map to declare where we want to render the map.
We use the coordinates of the City of London, a historical landmark in the middle of London, as map center. Later on, we discuss how you can use Maps API to find coordinates of any location on the map. But for now, if you are curious, you can use latlong.net to find coordinates of any address quickly.
Now that we have a basic map, we can look at the customization options that the Google Maps JavaScript API gives us. The first option that we are going to use is map type. Google Maps support four types of maps, which are:
Markers are amazing, and they make it possible to build lots of interactive applications with a map. For instance, some hotel booking websites use markers to show you the location of hotels on a map. And they are also very easy to add.
As you can see above, the code for our marker has three properties. The first one is the coordinates. After that, we pass the map variable where we stored our map in the beginning, and finally, we pass the title of the marker.
You might find something to be missing from our markers. Usually, when you click on a marker on the map, it shows you a popup with more details. That popup is a different component in itself that is called an InfoWindow.
First, we create a new infoWindow variable that stores our InfoWindow component. We only pass it a property of content that contains the HTML it shows once clicked. After that, we add an on-click event listener to our marker, which tells it to open the infoWindow when clicked on the marker.
Some of these methods allow you to get information from the map, such as getCenter, which returns center coordinates of the map. And similarly, some allow you to change the behavior, such as setCenter, which changes the center of the map.
Another concept which JavaScript developers might be familiar with is event listeners. You can attach actions to specific events, which means that when an event happens, such as change of center, those actions get triggered.
As you can see, the concept is pretty much the same as how event listeners work in JavaScript. First, we attach an onClick event listener to our map. Inside our event listener, we get the coordinates of where the user clicks and put it inside an InfoWindow.
That is it for this article, and I hope it gave you some confidence working with the Google Maps JavaScript API. It is incredibly straightforward to use and allows you to build pretty much anything you desire with a map!
Hardeep Asrani is a developer and Star Wars fan from Kanpur. He loves contributing to the WordPress community in many ways, including support, themes, plugins, and more. You can find him on Slack pretty much all the time exploring different parts of the WordPress community.Hardeep works for Themeisle.com as a support ninja and developer. Hardeep is also one of the organizers of WordCamp Kanpur.
Prearranged maps save time for users searching for physical locations, making them an integral part of many applications. To bring these maps to life, various mapping libraries and APIs have emerged, each offering a distinct set of features tailored to specific use cases. However, integrating maps into your application requires thoughtful consideration of the available options.
Mapping APIs in JavaScript offers a powerful way to bring maps to life within web browsers, enabling developers to create dynamic and engaging experiences centered around spatial data. These APIs provide a toolkit of features that allow you to:
The selection of these mapping APIs is based on adoption rate, their prominence within the developer community, and versatility across diverse use cases. We will delve into the essential factors to consider when choosing a mapping API for your JavaScript project, including features, performance, and integration.
Leaflet stands out as one of the top open source JavaScript libraries for crafting interactive maps. Optimized for both mobile and web devices, it is relatively small (around 42KB) and offers a ton of features, plugins, and a straightforward API. It works across all browsers and platforms.
Leaflet supports various tile providers as the base map, including popular options like OpenStreetMap, Mapbox, and more. It also has a rich ecosystem of plugins that expand its functionality to cater to diverse mapping needs.
Leaflet is freely available for both personal and commercial use, fostering a vibrant community of developers and users who contribute to its ongoing development and support. Its small footprint contributes to fast loading times, making it suitable for web apps that prioritize performance.
Mapbox GL JS is a robust JavaScript library designed to create interactive and visually captivating maps for the web. It leverages the power of Mapbox GL, a graphics library built on OpenGL for dynamic rendering of both 2D and 3D maps directly in compatible web browsers.
In terms of performance, Mapbox GL JS is optimized for speed and efficiency, delivering smooth map interactions even with large datasets. Its relatively small file size minimizes the impact on page load times, contributing to an enhanced user experience.
OpenLayers is a modular, high-performance library designed for displaying and interacting with maps and geospatial data. It is a free, open-source JS library released under the 2-Clause BSD License, facilitating the creation of interactive and feature-rich web maps.
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