在Leaflet中从MapQuest接口获取一点的高程

// 创建地图
var map = L.map('map').setView([51.505, -0.09], 13);

// 添加MapQuest图层
L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token={accessToken}', {
    attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, ' +
        '<a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, ' +
        'Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
    maxZoom: 18,
    id: 'mapbox.streets',
    accessToken: 'your-access-token'
}).addTo(map);

// 获取一点的高程
var latlng = L.latLng(51.5, -0.09);
L.Control.Elevation({ 
    position: "topright",
    theme: "lime-theme",
    width: 600,
    height: 125,
    margins: {
        top: 10,
        right: 20,
        bottom: 30,
        left: 50
    },
    useHeightIndicator: true,
    interpolation: "linear",
    hoverNumber: {
        decimalsX: 3,
        decimalsY: 0,
        formatter: undefined
    },
    xTicks: undefined,
    yTicks: undefined,
    collapsed: false,
    imperial: false
}).addTo(map).load(latlng);