javascript - 如何获取当前 map 的当前面积，宽度和高度(相对于纬度和经度)？

假设我有一个div内的地图，宽度为x且高度为y且缩放级别为t。如何找到当前可见地图的面积，宽度和高度？

最佳答案

这是答案，

var spherical = google.maps.geometry.spherical,
    bounds = map.getBounds(),
    cor1 = bounds.getNorthEast(),
    cor2 = bounds.getSouthWest(),
    cor3 = new google.maps.LatLng(cor2.lat(), cor1.lng()),
    cor4 = new google.maps.LatLng(cor1.lat(), cor2.lng()),
    width = spherical.computeDistanceBetween(cor1,cor3),
    height = spherical.computeDistanceBetween( cor1, cor4);