高德地图大批量数据(上万)画历史轨迹实现方案
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2022-12-22 21:11:39
转载请注明出处:https://www.cnblogs.com/Joanna-Yan/p/9896180.html 需求:设备传回服务器的轨迹点,需要在web地图上显示。包括画坐标点覆盖物、轨迹路线图。当数据量达到一定量时,界面出现卡顿。问题出现几天前端人员都未解决。 第一反应,大量的覆盖物肯定不能 ......
转载请注明出处:https://www.cnblogs.com/joanna-yan/p/9896180.html
需求:设备传回服务器的轨迹点,需要在web地图上显示。包括画坐标点覆盖物、轨迹路线图。当数据量达到一定量时,界面出现卡顿。问题出现几天前端人员都未解决。
第一反应,大量的覆盖物肯定不能直接添加在地图上。每一个地图对象或者图层能添加的覆盖物对象都是有限的,资源也是有限的。
能否通过创建多个图层去画覆盖物,同时根据地图的缩放级别来动态添加和减少覆盖物的数量。
好了,研究高德地图api。
1.首先找到一个海量点展示组建pointsimplifier。可以在地图上展示数量为十万以内的点并且性能表现较好,这点正好符合我们的需求。
它实际上是由海量点组成的一个地图图层,这点符合前面我们说的解决思路。
2.找到一个轨迹展示组建pathsimplifier 。同理上。
既然两个组建都可以支持大量数据,并且自动创建图层,那么我们完全可以把pointsimplifier和pathsimplifier通过图层叠加起来使用,分别实现我们的画点和画轨迹的需求。
先看效果图:
模拟上万点,地图随意缩放、移动不会出现卡顿问题。性能表现良好。
简单示例代码如下,自行根据需要优化:
<!-- 重点:getrenderoptions --> <!doctype html> <html lang="zh-cn"> <head> <!-- 原始地址://webapi.amap.com/ui/1.0/ui/misc/pointsimplifier/examples/animation.html --> <base href="//webapi.amap.com/ui/1.0/ui/misc/pointsimplifier/examples/" /> <meta charset="utf-8"> <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width"> <title>动态改样式</title> <style> html, body, #container { width: 100%; height: 100%; margin: 0px; } #loadingtip { position: absolute; z-index: 9999; top: 0; right: 0; padding: 3px 10px; background: red; color: #fff; font-size: 13px; } </style> </head> <body> <div id="container"></div> <script type="text/javascript" src='//webapi.amap.com/maps?v=1.4.10&key=您申请的key值'></script> <!-- ui组件库 1.0 --> <script src="//webapi.amap.com/ui/1.0/main.js?v=1.0.11"></script> <script type="text/javascript"> //创建地图 var map = new amap.map('container', { zoom: 4 }); //just some colors var colors = [ "#3366cc", "#dc3912", "#ff9900", "#109618", "#990099", "#0099c6", "#dd4477", "#66aa00", "#b82e2e", "#316395", "#994499", "#22aa99", "#aaaa11", "#6633cc", "#e67300", "#8b0707", "#651067", "#329262", "#5574a6", "#3b3eac" ];
amapui.load(['ui/misc/pointsimplifier', 'lib/$'], function(pointsimplifier, $) { if (!pointsimplifier.supportcanvas) { alert('当前环境不支持 canvas!'); return; } var pointsimplifierins = new pointsimplifier({ zindex: 115, autosetfitview: false, map: map, //所属的地图实例 getposition: function(item) { if (!item) { return null; } var parts = item.split(','); return [parsefloat(parts[0]), parsefloat(parts[1])]; }, gethovertitle: function(dataitem, idx) { return '序号: ' + idx; }, //使用groupstylerender renderconstructor: pointsimplifier.render.canvas.groupstylerender, renderoptions: { //点的样式 pointstyle: { fillstyle: 'red', width: 5, height: 5 }, getgroupid: function(item, idx) { var parts = item.split(','); //按纬度区间分组 return math.abs(math.round(parsefloat(parts[1]) / 3)); }, groupstyleoptions: function(gid) { return { pointstyle: { fillstyle: colors[gid % colors.length] } }; } } }); $('<div id="loadingtip">加载数据,请稍候...</div>').appendto(document.body); $.get('https://a.amap.com/amap-ui/static/data/10w.txt', function(csv) { var data = csv.split('\n'); pointsimplifierins.setdata(data); $('#loadingtip').remove(); //startanim(); });//画线===================================================== amapui.load(['ui/misc/pathsimplifier', 'lib/$'], function(pathsimplifier, $) { if (!pathsimplifier.supportcanvas) { alert('当前环境不支持 canvas!'); return; } var pathsimplifierins2 = new pathsimplifier({ zindex: 100, //autosetfitview:false, map: map, //所属的地图实例 getpath: function(pathdata, pathindex) { return pathdata.path; }, gethovertitle: function(pathdata, pathindex, pointindex) { if (pointindex >= 0) { //point return pathdata.name + ',点:' + pointindex + '/' + pathdata.path.length; } return pathdata.name + ',点数量' + pathdata.path.length; }, renderoptions: { renderallpointsifnumberbelow: 100 //绘制路线节点,如不需要可设置为-1 } }); window.pathsimplifierins = pathsimplifierins2; //设置数据,模拟路线数据 pathsimplifierins2.setdata([{ name: '路线0', path: [ 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[123.466002,41.810057],[116.55152,40.101459],[114.179526,22.720042],[120.189177,30.19047],[118.950431,32.052233],[119.212254,36.973457],[106.551207,29.549722],[116.488509,40.010936],[121.370139,31.181822], [118.868438,32.022459],[113.000335,23.261914],[116.266745,40.173843],[119.317648,25.988715] ] }]); //对第一条线路(即索引 0)创建一个巡航器 var navg1 = pathsimplifierins2.createpathnavigator(0, { loop: true, //循环播放 speed: 1000000 //巡航速度,单位千米/小时 }); navg1.start(); }); </script> </body> </html>
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