将谷歌地图中心放在kml上,而不是位置
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【中文标题】将谷歌地图中心放在kml上,而不是位置【英文标题】:Center google map on kml, not location 【发布时间】:2017-04-27 22:39:04 【问题描述】:我在网页上有这个简单的脚本,加载一个小的 kml 文件,但是当我添加地理定位时,它总是以当前位置为中心的地图。 我想加载以 kml 文件为中心的地图。仅当用户在 kml 区域内或将地图拖到其所在区域时,才应显示用户位置。 另外,有没有办法使用javascript(maps api 3)轻松刷新地图上的用户位置,而无需重新居中地图?
var map;
function initialize()
var centre = new google.maps.LatLng(4,4);
var mapOptions =
zoom: 11,
center: centre
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
var ctaLayer = new google.maps.KmlLayer(
url: 'http://www.server.com/kmlfile.kml',
preserveViewport: false
);
ctaLayer.setMap(map);
if(navigator.geolocation)
navigator.geolocation.getCurrentPosition(function(position)
var pos = new google.maps.LatLng(position.coords.latitude,
position.coords.longitude);
var infowindow = new google.maps.InfoWindow(
map: map,
position: pos,
content: 'Location found using html5.'
);
// map.setCenter(pos);
, function()
handleNoGeolocation(true);
);
function handleNoGeolocation(errorFlag)
if (errorFlag)
var content = 'Error: The Geolocation service failed.';
else
var content = 'Error: Your browser doesn\'t support geolocation.';
var options =
map: map,
position: new google.maps.LatLng(60, 105),
content: content
;
var infowindow = new google.maps.InfoWindow(options);
map.setCenter(options.position);
google.maps.event.addDomListener(window, 'load', initialize);
所以,这是我的最新更新,我向 infoWindow 添加了 disableAutoPan: true 选项,如图所示,为了刷新用户位置,我使用 watchPosition 代替 getCurrentPosition,与 setPosition 一起移动 infoWindow 的位置:
var map;
function initialize()
var center_map = new google.maps.LatLng(45,-4);
var mapOptions =
zoom: 11,
center: centre
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
var ctaLayer = new google.maps.KmlLayer(
url: 'http://www.server.com/kmlfile.kml', preserveViewport: false
);
var ctaLayer.setMap(map);
if(navigator.geolocation)
navigator.geolocation.watchPosition(function(position)
var pos = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
if(typeof infowindow == "undefined")
infowindow = new google.maps.InfoWindow(
disableAutoPan: true,
map: map, position: pos,
content: 'Your position',
zIndex: 0 /* not needed */
);
else
infowindow.setPosition(pos);
, function()
/*handleNoGeolocation(true);*/
/* had to delete this because errors centered the map on North Pole */
,
timeout: 10000, enableHighAccuracy: true ); /* high accuracy for tests */
;
google.maps.event.addDomListener(window, 'load', initialize);
显然它有效,虽然我认为它很原始......
【问题讨论】:
【参考方案1】:当您打开InfoWindow
时,它正在平移地图以显示它。在InfoWindowOptions
中将disableAutoPan
设置为true。
var infowindow = new google.maps.InfoWindow(
map: map,
position: pos,
content: 'Location found using HTML5.',
disableAutoPan: true
);
proof of concept fiddle
代码 sn-p:
var map;
function initialize()
var centre = new google.maps.LatLng(4, 4);
var mapOptions =
zoom: 11,
center: centre
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
var ctaLayer = new google.maps.KmlLayer(
url: 'http://www.geocodezip.com/geoxml3_test/cta.xml',
preserveViewport: false
);
ctaLayer.setMap(map);
if (navigator.geolocation)
navigator.geolocation.getCurrentPosition(function(position)
var pos = new google.maps.LatLng(position.coords.latitude,
position.coords.longitude);
var infowindow = new google.maps.InfoWindow(
disableAutoPan: true,
map: map,
position: pos,
content: 'Location found using HTML5.'
);
// map.setCenter(pos);
, function()
handleNoGeolocation(true);
);
function handleNoGeolocation(errorFlag)
if (errorFlag)
var content = 'Error: The Geolocation service failed.';
else
var content = 'Error: Your browser doesn\'t support geolocation.';
var options =
map: map,
position: new google.maps.LatLng(60, 105),
content: content,
disableAutoPan: true
;
var infowindow = new google.maps.InfoWindow(options);
// map.setCenter(options.position);
google.maps.event.addDomListener(window, 'load', initialize);
html,
body,
#map-canvas
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="map-canvas"></div>
【讨论】:
谢谢,听起来很完美。为了刷新用户位置,我尝试使用 watchPosition 代替 getCurrentPosition,添加了第三个参数 timeout: 10000, enableHighAccuracy: true ,看起来不错,对吗?并足以更新用户的位置?还不能用我的智能手机测试... 那是另一个问题。 是的,我在第一篇文章中提到了一个附属问题......显然它有效,但仍然显示以前的信息窗口(android)。也许属性一个 zIndex... 相关问题How to remove information from info window (on a KmlLayer) 与How can I completely remove the Google Maps Pop-up Balloon?重复以上是关于将谷歌地图中心放在kml上,而不是位置的主要内容,如果未能解决你的问题,请参考以下文章
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