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轨迹纠偏服务插件。用于将一组带方向的、可能偏离道路的经纬度轨迹，纠正为准确沿着道路的一条经纬度路径。比如将一组间隔采集的车辆位置和朝向、速度、时间等信息传入，可以得到一组沿着道路行进的经纬度路径和总的行驶历程。 准备原始轨迹数据纠偏之前需要按照下面的数据规格准备原始轨迹点，x、y、sp、ag、tm分别代表经度、纬度、速度、角度、时间。 需要注意经纬度应该是高德坐标，而不是GPS直接采集的坐标，可通过AMap.convertFrom转化tm以秒为单位，第一个采集点的tm值从1970年0点开始，其他采集点为与第一个采集点时间的差值 var originPath= [
{"x":116.478928,"y":39.997761,"sp":19,"ag":0, "tm":1478031031},
{"x":116.478907,"y":39.998422,"sp":10,"ag":0, "tm":2},
{"x":116.479384,"y":39.998546,"sp":10,"ag":110,"tm":3},
{"x":116.481053,"y":39.998204,"sp":10,"ag":120,"tm":4},
{"x":116.481793,"y":39.997868,"sp":10,"ag":120,"tm":5},
{"x":116.482898,"y":39.998217,"sp":10,"ag":30, "tm":6},
{"x":116.483789,"y":39.999063,"sp":10,"ag":30, "tm":7},
{"x":116.484674,"y":39.999844,"sp":10,"ag":30, "tm":8}
]调用轨迹纠偏服务AMap.plugin('AMap.GraspRoad',function(){
var grasp = new AMap.GraspRoad();
grasp.driving(originPath,function(error,result){
if(!error){
var newPath = result.data.points;//纠偏后的轨迹
var distance = result.data.distance;//里程
}
})
})查看示例
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