Google Map API v3 - 设置边界和中心
我最近切换到Google Maps API V3。 我正在绘制一个简单示例，它可以绘制数组中的标记，但我不知道如何自动对标记进行居中和缩放。
我搜索了网络的高低，包括谷歌自己的文档，但没有找到明确的答案。 我知道我可以简单地选取坐标的平均值，但是如何设定相应的缩放比例？
function initialize() {
var myOptions = {
zoom: 10,
center: new google.maps.LatLng(-33.9, 151.2),
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById("map_canvas"),myOptions);
setMarkers(map, beaches);
}
var beaches = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.423036, 151.259052, 5],
['Cronulla Beach', -34.028249, 121.157507, 3],
['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
['Maroubra Beach', -33.450198, 151.259302, 1]
];
function setMarkers(map, locations) {
var image = new google.maps.MarkerImage('images/beachflag.png',
new google.maps.Size(20, 32),
new google.maps.Point(0,0),
new google.maps.Point(0, 32));
var shadow = new google.maps.MarkerImage('images/beachflag_shadow.png',
new google.maps.Size(37, 32),
new google.maps.Point(0,0),
new google.maps.Point(0, 32));
var lat = map.getCenter().lat();
var lng = map.getCenter().lng();
var shape = {
coord: [1, 1, 1, 20, 18, 20, 18 , 1],
type: 'poly'
};
for (var i = 0; i < locations.length; i++) {
var beach = locations[i];
var myLatLng = new google.maps.LatLng(beach[1], beach[2]);
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
shadow: shadow,
icon: image,
shape: shape,
title: beach[0],
zIndex: beach[3]
});
}
}
是的，只需声明你的新边界对象。
var bounds = new google.maps.LatLngBounds();
然后对于每个标记，扩展你的边界对象：
bounds.extend(myLatLng);
map.fitBounds(bounds);
API：google.maps.LatLngBounds
将所有内容排序 - 查看最后几行代码 - （ bounds.extend(myLatLng); map.fitBounds(bounds); ）
function initialize() {
var myOptions = {
zoom: 10,
center: new google.maps.LatLng(0, 0),
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(
document.getElementById("map_canvas"),
myOptions);
setMarkers(map, beaches);
}
var beaches = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 161.259052, 5],
['Cronulla Beach', -36.028249, 153.157507, 3],
['Manly Beach', -31.80010128657071, 151.38747820854187, 2],
['Maroubra Beach', -33.950198, 151.159302, 1]
];
function setMarkers(map, locations) {
var image = new google.maps.MarkerImage('images/beachflag.png',
new google.maps.Size(20, 32),
new google.maps.Point(0,0),
new google.maps.Point(0, 32));
var shadow = new google.maps.MarkerImage('images/beachflag_shadow.png',
new google.maps.Size(37, 32),
new google.maps.Point(0,0),
new google.maps.Point(0, 32));
var shape = {
coord: [1, 1, 1, 20, 18, 20, 18 , 1],
type: 'poly'
};
var bounds = new google.maps.LatLngBounds();
for (var i = 0; i < locations.length; i++) {
var beach = locations[i];
var myLatLng = new google.maps.LatLng(beach[1], beach[2]);
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
shadow: shadow,
icon: image,
shape: shape,
title: beach[0],
zIndex: beach[3]
});
bounds.extend(myLatLng);
}
map.fitBounds(bounds);
}
我对谷歌地图api v3的建议是（不要认为它可以做得更有效）：
gmap : {
fitBounds: function(bounds, mapId)
{
//incoming: bounds - bounds object/array; mapid - map id if it was initialized in global variable before "var maps = [];"
if (bounds==null) return false;
maps[mapId].fitBounds(bounds);
}
}
结果u将在地图窗口中将所有点放在边界内。
例子完美地工作，你可以自由地在这里查看www.zemelapis.lt
链接地址: http://www.djcxy.com/p/14299.html