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Using Baidu Map API in PHP to realize the visualization and layer overlay of regional maps
Introduction:
With the development of the times, maps have become an indispensable part of our lives. In web development, the use of map API is also becoming more and more widespread. This article will introduce how to use PHP and Baidu Map API to visualize area maps and perform layer overlay operations.
1. Preparation work
Before we start, we need to prepare some things:
2. Obtain the Baidu Map API key
3. Create a map page
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>区域图可视化</title> <style type="text/css"> /* 设置地图容器的宽高 */ #map { width: 100%; height: 500px; } </style> </head> <body> <div id="map"></div> </body> </html>
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>区域图可视化</title> <style type="text/css"> /* 设置地图容器的宽高 */ #map { width: 100%; height: 500px; } </style> <script src="http://api.map.baidu.com/api?v=2.0&ak=你的百度地图API密钥"></script> </head> <body> <div id="map"></div> </body> </html>
4. Draw the area map
Map
Class creates a map object: var map = new BMap.Map("map");
map.centerAndZoom(new BMap.Point(116.404, 39.915), 10);
var polygon = new BMap.Polygon([ new BMap.Point(116.387112,39.920977), new BMap.Point(116.385243,39.913063), new BMap.Point(116.394226,39.917988) ], {strokeColor: "red", strokeWeight: 2, strokeOpacity: 0.5}); // 设置区域的样式 map.addOverlay(polygon);
5. Layer overlay
There are many ways to add map overlays. This article takes adding mouse drawing tools as an example:
var drawingManager = new BMapLib.DrawingManager(map, { isOpen: true, // 是否开启绘制模式 enableDrawingTool: true, // 是否显示工具栏 drawingToolOptions: { anchor: BMAP_ANCHOR_TOP_RIGHT, // 工具栏的位置 offset: new BMap.Size(5, 5), // 工具栏的偏移量 drawingModes: [ BMAP_DRAWING_POLYGON // 仅显示多边形绘制工具 ] } });
drawingManager.addEventListener('polygoncomplete', function(polygon) { var overlay = polygon.getPath(); // 获取绘制的区域坐标 // 执行其他操作,比如将坐标传给后端进行处理等 });
6. Complete code Example
区域图可视化
Conclusion:
Through the above steps, we successfully used PHP and Baidu Map API to realize the visualization and layer overlay of the area map. You can adjust the style of the drawn area map or process the area according to your own needs. Wish you happy using it!
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