这里有一个解决方案，可以在没有自定义边距的情况下尽可能地放大地图。如果你想的话，你应该能够调整它来考虑一些边际。

我的解决方案是基于 this comment in a Google Groups thread 的。不幸的是，对 helper.getProjection() 的调用总是返回undefined，所以我稍微修改了上面的答案，并提出了这个有效的代码。

只需将现有的对 map.fitBounds(bounds) 的调用替换为 myFitBounds(map, bounds) ：

function myFitBounds(myMap, bounds) {
    myMap.fitBounds(bounds);
    var overlayHelper = new google.maps.OverlayView();
    overlayHelper.draw = function () {
        if (!this.ready) {
            var projection = this.getProjection(),
                zoom = getExtraZoom(projection, bounds, myMap.getBounds());
            if (zoom > 0) {
                myMap.setZoom(myMap.getZoom() + zoom);
            this.ready = true;
            google.maps.event.trigger(this, 'ready');
    overlayHelper.setMap(myMap);
// LatLngBounds b1, b2 -> zoom increment
function getExtraZoom(projection, expectedBounds, actualBounds) {
    var expectedSize = getSizeInPixels(projection, expectedBounds),
        actualSize = getSizeInPixels(projection, actualBounds);
    if (Math.floor(expectedSize.x) == 0 || Math.floor(expectedSize.y) == 0) {
        return 0;
    var qx = actualSize.x / expectedSize.x;
    var qy = actualSize.y / expectedSize.y;
    var min = Math.min(qx, qy);
    if (min < 1) {
        return 0;
    return Math.floor(Math.log(min) / Math.log(2) /* = log2(min) */);
// LatLngBounds bnds -> height and width as a Point
function getSizeInPixels(projection, bounds) {
    var sw = projection.fromLatLngToContainerPixel(bounds.getSouthWest());