[英]KML Layers rendering order google maps
我注意到以下APIS有一些不同的行为
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
http://jsfiddle.net/x8dSP/2062/
有时,多边形层会在气球层的顶部渲染,有时会相反。
好像在地图被“缓存”之后? 在浏览器中,它将以多边形层位于顶部的方式进行渲染。 反正有防止这种情况发生的方法吗? 还是让一层始终在背景中? 不幸的是,我无法在一个kml中映射这些图层。
图层将按照从服务器接收的顺序进行渲染(不一定是它们在代码中出现的顺序)。 您可以通过在设置第二个地图的map属性之前等待KmlLayer status_changed事件来强制一个在另一个之后加载。
function initialize() {
var chicago = new google.maps.LatLng(-122.365662,37.826988);
var mapOptions = {
zoom: 11,
center: chicago
}
var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
var ctaLayer = new google.maps.KmlLayer({
url: 'https://sites.google.com/site/gmaptest123/kml/nst.kml'
});
google.maps.event.addListener(ctaLayer, "status_changed", function() {
ctaLayer2.setMap(map);
});
ctaLayer.setMap(map);
var ctaLayer2 = new google.maps.KmlLayer({
url: 'https://sites.google.com/site/gmaptest123/kml/HelloKml6.kml'
});
}
google.maps.event.addDomListener(window, 'load', initialize);
我在这里工作
将这两个参数添加到标记层:
pane: "floatPane",
preserveViewport: true
所以看起来像这样:
var ctaLayer2 = new google.maps.KmlLayer({
url: 'https://sites.google.com/site/gmaptest123/kml/HelloKml6.kml',
pane: "floatPane",
preserveViewport: true
});
我相信默认值为mapPane,它的z-index值比floatPane低。
在此链接中有一个有趣的方法。 这是实际的订购代码:
// BEGIN SEQUENTIAL KML LOADING CODE
// This ensures the layers are drawn in order: cone, warnings, track
// Draw coneLayer
coneLayer.setMap(map);
// Listen for when coneLayer is drawn
var listener1 = google.maps.event.addListener(coneLayer, 'metadata_changed', function() {
// When it's drawn (metadata changed), clear listener, draw warningsLayer ...
google.maps.event.clearListeners(coneLayer, 'metadata_changed');
warningsLayer.setMap(map);
// .. and listen for when warningsLayer is drawn
var listener2 = google.maps.event.addListener(warningsLayer, 'metadata_changed', function() {
// When it's drawn, clear listener, draw trackLayer ...
google.maps.event.clearListeners(warningsLayer, 'metadata_changed');
trackLayer.setMap(map);
// ... and listen for when trackLayer is drawn
var listener3 = google.maps.event.addListener(trackLayer, 'metadata_changed', function() {
// When it's drawn, clear listener and blank out the map-loading sign
google.maps.event.clearListeners(trackLayer, 'metadata_changed');
$('#loadingIndicator').html("");
});
});
});
// END SEQUENTIAL KML LOADING CODE
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