Javascript 如何在Google Maps api v3中的KML/KMZ层之间切换
我正在开发一个带有谷歌地图应用程序的网页。目前,我有一个功能搜索栏和地图,显示三个KML/KMZ层。我需要能够在每一层之间切换,或者显示其中一层、两层或者全部三层。Google Earth中也有类似的功能,但我需要在Google地图中使用它。我该怎么做 以下是我的地图和搜索栏代码:Javascript 如何在Google Maps api v3中的KML/KMZ层之间切换,javascript,google-maps-api-3,toggle,kml,kmz,Javascript,Google Maps Api 3,Toggle,Kml,Kmz,我正在开发一个带有谷歌地图应用程序的网页。目前,我有一个功能搜索栏和地图,显示三个KML/KMZ层。我需要能够在每一层之间切换,或者显示其中一层、两层或者全部三层。Google Earth中也有类似的功能,但我需要在Google地图中使用它。我该怎么做 以下是我的地图和搜索栏代码: <script type="text/javascript"> var geocoder; var map; var marker; function initialize(
<script type="text/javascript">
var geocoder;
var map;
var marker;
function initialize() {
geocoder = new google.maps.Geocoder ();
var latlng = new google.maps.LatLng (40.43, -74.00);
var myOptions = {
zoom: 5,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
marker = new google.maps.Marker({map:map});
var ctaLayer = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/NY_Radar_data.kmz');
ctaLayer.setMap(map);
var ctaLayer = new google.maps.KmlLayer('http://www.nyc.gov/html/dot/downloads/misc/cityracks.kml');
ctaLayer.setMap(map);
var ctaLayer = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/OKX_Radar_data%20(1).kmz');
ctaLayer.setMap(map);
}
function codeAddress () {
var address = document.getElementById ("address").value;
geocoder.geocode ( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results [0].geometry.location);
marker.setPosition(results [0].geometry.location);
map.setZoom(14);
}
else {
alert("Geocode was not successful for the following reason: " + status);
}
});
}
</script>
只需setMapnull隐藏一个,setMapmap显示一个。我保留一个全局数组变量layers,以跟踪要切换的层:
var layers = [];
layers[0] = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/NY_Radar_data.kmz',
{preserveViewport: true});
layers[1] = new google.maps.KmlLayer('http://www.nyc.gov/html/dot/downloads/misc/cityracks.kml',
{preserveViewport: true});
layers[2] = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/OKX_Radar_data%20(1).kmz',
{preserveViewport: true});
function toggleLayer(i) {
if(layers[i].getMap() === null) {
layers[i].setMap(map);
}
else {
layers[i].setMap(null);
}
}
切换图层时,“保留视口”选项可阻止贴图四处跳跃
以下是切换的功能:
var layers = [];
layers[0] = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/NY_Radar_data.kmz',
{preserveViewport: true});
layers[1] = new google.maps.KmlLayer('http://www.nyc.gov/html/dot/downloads/misc/cityracks.kml',
{preserveViewport: true});
layers[2] = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/OKX_Radar_data%20(1).kmz',
{preserveViewport: true});
function toggleLayer(i) {
if(layers[i].getMap() === null) {
layers[i].setMap(map);
}
else {
layers[i].setMap(null);
}
}
注意,它使用全局变量。最后,在HTML中,您可以使用复选框或按钮,甚至单选按钮,方法是首先只设置一个活动层,然后在更新无线电机时启用正确的层
Large weather <input type="checkbox" id="layer0" onclick="toggleLayer(0)" checked>
<input type="button" id="layer1" onclick="toggleLayer(1)" value="Racks">
Small weather <input type="checkbox" id="layer2" onclick="toggleLayer(2)" checked>
整个演示在这里,控件位于地图的左上角:只需设置MapNull来隐藏一个,设置MapMap来显示。我保留一个全局数组变量layers,以跟踪要切换的层:
var layers = [];
layers[0] = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/NY_Radar_data.kmz',
{preserveViewport: true});
layers[1] = new google.maps.KmlLayer('http://www.nyc.gov/html/dot/downloads/misc/cityracks.kml',
{preserveViewport: true});
layers[2] = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/OKX_Radar_data%20(1).kmz',
{preserveViewport: true});
function toggleLayer(i) {
if(layers[i].getMap() === null) {
layers[i].setMap(map);
}
else {
layers[i].setMap(null);
}
}
切换图层时,“保留视口”选项可阻止贴图四处跳跃
以下是切换的功能:
var layers = [];
layers[0] = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/NY_Radar_data.kmz',
{preserveViewport: true});
layers[1] = new google.maps.KmlLayer('http://www.nyc.gov/html/dot/downloads/misc/cityracks.kml',
{preserveViewport: true});
layers[2] = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/OKX_Radar_data%20(1).kmz',
{preserveViewport: true});
function toggleLayer(i) {
if(layers[i].getMap() === null) {
layers[i].setMap(map);
}
else {
layers[i].setMap(null);
}
}
注意,它使用全局变量。最后,在HTML中,您可以使用复选框或按钮,甚至单选按钮,方法是首先只设置一个活动层,然后在更新无线电机时启用正确的层
Large weather <input type="checkbox" id="layer0" onclick="toggleLayer(0)" checked>
<input type="button" id="layer1" onclick="toggleLayer(1)" value="Racks">
Small weather <input type="checkbox" id="layer2" onclick="toggleLayer(2)" checked>
整个演示在这里,地图左上角的控件:Heiter的答案很好,但对jsbin示例中的代码进行了一点补充,如果您想在初始化时取消显示层,则需要更改
layers[i].setMap(map);
到
然后确保您的复选框未选中 Heiter的回答很好,但是对jsbin示例中的代码做了一点补充,如果您想在初始化时不显示层,则需要更改
layers[i].setMap(map);
到
然后确保您的复选框未选中 我尝试了Heitor上面发布的代码,注意到点击图层的打开和关闭会改变图层在地图上的显示顺序。我实现这个解决方案是为了保持层的顺序,但它可能有点低效。如果有人有任何建议,请分享 功能切换{ var j; 对于j=0;j