Question

我不知道下一步采取什么方法，目前我有下面的代码，它计算任意两个给定位置（使用长和纬度）之间的英里距离，但是它是一条直线，并且道路不是＆＃39;直...所以我想要做的是计算谷歌地图的距离，例如这里是一些随机坐标：

lat1:   53.015036674593500
lat2:   -2.244633982337860
long1:   52.363731052413800
long2:  -1.307122733526320

并且在转换为此代码（JavaScript）时

function distance(lat1, lon1, lat2, lon2, unit) {
        var radlat1 = Math.PI * lat1 / 180
        var radlat2 = Math.PI * lat2 / 180
        var radlon1 = Math.PI * lon1 / 180
        var radlon2 = Math.PI * lon2 / 180
        var theta = lon1 - lon2
        var radtheta = Math.PI * theta / 180
        var dist = Math.sin(radlat1) * Math.sin(radlat2) + Math.cos(radlat1) * Math.cos(radlat2) * Math.cos(radtheta);
        dist = Math.acos(dist)
        dist = dist * 180 / Math.PI
        dist = dist * 60 * 1.1515
        if (unit == "K") { dist = dist * 1.609344 }
        if (unit == "N") { dist = dist * 0.8684 }
        return dist
    }

    var dist = distance(lata, longa, latb, longb, unit).toFixed(2);

    window.alert(dist + " miles");

返回的值是 59.83 里程或者那里...如果我要在谷歌地图中执行此操作：

https://www.google.co.uk/maps/dir/1+Creswell+Pl,+Cawston,+Rugby+CV22+7GZ,+UK/1+Ironbridge+Dr,+Newcastle+ST5+6ER,+UK/@52.6863234,-2.0253047,10z/data=!3m1!4b1!4m13!4m12!1m5!1m1!1s0x487747659759ff6f:0x2ae7f451f320ca80!2m2!1d-1.3071227!2d52.3637323!1m5!1m1!1s0x487a67f1ebd6bdaf:0x89c3b0d334683e52!2m2!1d-2.2446339!2d53.0150378

值介于 77.1英里和 76.5英里

之间

问题

我有以下功能PARTLY工作以获取旅行时间和距离，但它会随机返回＆＃34; UNDEFINED＆＃34;在底部的警告框中，或者有此错误消息

"Object doesn't support this action"

使用console.log时会返回以下消息：

"google.maps.DistanceMatrixService is not a function"

代码：

 var siteP = postcodearray.indexOf(screen.sitePostcode);
    var StaffP = postcodearray.indexOf(screen.engineerPostcode);

    sitelat = latarray[siteP];
    sitelong = longarray[siteP];
    stafflat = latarray[StaffP];
    stafflong = longarray[StaffP];

    var site = sitelat + ", " + sitelong;
    var staff = stafflat + ", " + stafflong;

    var distance;
    var duration;

    var service = new google.maps.DistanceMatrixService();
    service.getDistanceMatrix({
        origins: [staff],
        destinations: [site],
        travelMode: google.maps.TravelMode.DRIVING,
        unitSystem: google.maps.UnitSystem.METRIC,
        avoidHighways: false,
        avoidTolls: false
    }, function (response, status) {
        if (status == google.maps.DistanceMatrixStatus.OK && response.rows[0].elements[0].status != "ZERO_RESULTS") {
            distance = response.rows[0].elements[0].distance.text;
            duration = response.rows[0].elements[0].duration.text;
            //var dvDistance = document.getElementById("dvDistance");
            //dvDistance.innerHTML = "";
            //dvDistance.innerHTML += "Distance: " + distance + "<br />";
            //dvDistance.innerHTML += "Duration:" + duration;

        } else {
            alert("Unable to find the distance via road.");
        }
    });

    window.alert(distance); //UNDEFINED

请有人指出我做了什么/我做错了，因为我非常接近我需要的2个值

Answer 1

您可以在此处找到使用Bing Maps REST服务计算JavaScript中位置之间路线的示例：https://msdn.microsoft.com/en-us/library/gg427607.aspx

我建议添加routeAttributes参数并将其设置为routeSummariesOnly。这将使响应非常小。 https://msdn.microsoft.com/en-us/library/ff701717.aspx

或者，如果您使用的是JavaScript并希望加载地图，请使用Bing Maps JavaScript控件和路线指示模块：https://msdn.microsoft.com/en-us/library/hh312802.aspx

您还可以在此处找到Bing Maps控件的交互式SDK：https://www.bingmapsportal.com/ISDK/AjaxV7#CreateMap1

您需要Bing地图密钥才能访问该服务，但不必将其绑定到参考。我建议您在此处注册免费的Bing地图密钥：https://azure.microsoft.com/en-us/marketplace/partners/bingmaps/mapapis/

从Google API（）检索距离和旅行时间值时出错

1 个答案: