How to use JS and Baidu Maps to implement the map's popular location recommendation function

How to use JS and Baidu Maps to implement the popular map location recommendation function

With the rapid development of the Internet, map services have become an important tool for people to travel and navigate. As one of the major map service providers, Baidu Maps not only provides basic map display and navigation functions, but also provides a rich API interface, allowing developers to expand and customize according to their own needs. This article will introduce how to use JS and Baidu Map API to implement the map popular location recommendation function, and provide specific code examples.

1. Preparation
Before starting, you need to make the following preparations:

1. Register a Baidu Map developer account and create an application. Open the Baidu Map Open Platform website (http://lbsyun.baidu.com/), click the [Console] button in the upper right corner, and follow the steps to register an account and create a new application.
2. Get ak (Access Key). On the application management page, you can find an option called "Key Management". After clicking to enter, you can obtain ak, which is the identity required to access Baidu Map API.
3. Create an HTML file and introduce Baidu Map’s JavaScript API. Add the following code to the head of the HTML file:

<script type="text/javascript" src="http://api.map.baidu.com/api?v=3.0&ak=您的AK"></script>

Among them, "your AK" needs to be replaced with the ak you obtained in step 2.

2. Implement the popular location recommendation function on the map
The specific implementation steps will be introduced below.

1. Create a map container
   In the body of the HTML file, add a div element as a map container.

   <div id="map"></div>

At this time, the id of the map container is "map".

2. Initialize the map
   In the JavaScript code, use the BMap.Map object of the Baidu Map API to initialize the map.

   var map = new BMap.Map("map");
   var point = new BMap.Point(116.404, 39.915); // 初始化地图中心点坐标
   map.centerAndZoom(point, 15); // 设置地图中心点和缩放级别

In the above code, we created a BMap.Map object and specified the id of the map container as "map". At the same time, the BMap.Point object is used to specify the initial center point coordinates of the map. map.centerAndZoom()The method sets the center point and zoom level of the map.

3. Add popular location markers
   We can add markers on the map through the BMap.Marker object of Baidu Map API.

   var marker = new BMap.Marker(point); // 创建标记
   map.addOverlay(marker); // 添加标记到地图

In the above code, we created a BMap.Marker object and specified the coordinate point of the marker. Next, use the addOverlay() method of the map object to add the marker to the map.

4. Set the popular location information window
   The marked information window can be set through the BMap.InfoWindow object.

   var infoWindow = new BMap.InfoWindow("这是一个热门地点"); // 创建信息窗口
   marker.addEventListener("click", function () {
       this.openInfoWindow(infoWindow); // 点击标记时打开信息窗口
   });

In the above code, we created a BMap.InfoWindow object and specified the content of the information window as "This is a popular place". Then, a "click" event listener is added to the mark through marker.addEventListener(), and the information window is opened when the mark is clicked.

5. Add other popular places
   You can follow the above steps to continue adding markers and information windows for other popular places.

   var point2 = new BMap.Point(116.404, 39.916);
   var marker2 = new BMap.Marker(point2);
   map.addOverlay(marker2);
   var infoWindow2 = new BMap.InfoWindow("这是另一个热门地点");
   marker2.addEventListener("click", function () {
       this.openInfoWindow(infoWindow2);
   });

point2, marker2, infoWindow2 in the above code respectively represent the coordinates, markers and information of the second popular location window. More popular locations can be added as needed.

3. Realize the effect display
After completing the above code, you can open the HTML file in the browser to see the final recommendation effect of popular map locations.

To sum up, this article introduces how to use JS and Baidu Map API to implement the map popular location recommendation function. By initializing the map, adding markers and information windows, we can display popular locations on the map and display the corresponding information windows when the markers are clicked. I hope this article can help readers understand how to use JS and Baidu Maps to implement this function, and thereby expand more map-related applications.

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