我想使用84MB kml文件在Google Map上显示KML层,但Google Map不支持超过10MB kml文件。
Google Map开发人员链接涉及KML渲染的大小和复杂性限制
https://developers.google.com/maps/documentation/javascript/kmllayer
请检查下面的代码,我用来在Google Map中显示KML层。与小型kml文件一起工作正常。
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0">
<meta charset="utf-8">
<title>KML Layer</title>
<style>
#map {
height: 80%;
}
html, body {
height: 100%;
margin: 0;
padding: 0;
}
</style>
</head>
<body>
<div>
<a href="#" class="button" data-latLng="cta_red.kml">Red Fibre</a><br>
<a href="#" class="button" data-latLng="cta_green.kml">Green Fibre</a><br>
<a href="#" class="button" data-latLng="cta_blue.kml">Blue Fibre</a><br>
</div><br>
<div id="map"></div>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyAWsZy8xWxT9yNBvYcO1dpxBzDttr7DqLA&sensor=false">
</script>
<script src="https://code.jquery.com/jquery-2.2.4.min.js"
integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44=" crossorigin="anonymous"></script>
<script>
jQuery(document).ready(function() {
var defaultu = 'cta.kml';
initMapp(defaultu);
jQuery(document).on("click", ".button", function(e) {
e.preventDefault();
var url = jQuery(this).attr("data-latLng");
initMapp(url);
});
function initMapp(url) {
var myLatLng = {lat: 41.876, lng: -87.624}
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 17,
center: myLatLng
});
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
title: 'Hello David!'
});
var kmlurl = url;
var ctaLayer = new google.maps.KmlLayer({
url: kmlurl,
map: map
});
}
});
</script>
</body>
</html>
一个选项是使用第三方KML解析器,例如GeoxMl3或Geoxml-V3。请注意,由于KML文件的大小和复杂性,可能会有性能问题,并且加载时间很长。
var geoXml = null;
var map = null;
var myLatLng = null;
function initialize() {
myLatLng = new google.maps.LatLng(37.422104808,-122.0838851);
var myOptions = {
zoom: 18,
center: new google.maps.LatLng(37.422104808,-122.0838851),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
geoXml = new geoXML3.parser({
map: map,
singleInfoWindow: true,
});
geoXml.parse('cta.xml');
};
live示例(带有小kml文件)