参数名	类型	必填	参数示例	说明

参数名	类型	必填	参数示例	说明
origin	string	是		出发点 规则： lon，lat（经度，纬度）， “,”分割，如117.500244, 40.417801 经纬度小数点不超过6位
destination	string	是		目的地 规则： lon，lat（经度，纬度）， “,”分割，如117.500244, 40.417801 经纬度小数点不超过6位
sig	string	是		数字签名数字签名获取和使用方法
output	string	是		返回数据格式类型 可选值：JSON，XML
callback	string	是		回调函数 callback值是用户定义的函数名称，此参数只在output=JSON时有效
Key	string	是		用户在高德地图官网申请Web服务API类型Key

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