Google Maps overlay not showing_问答_开发者_运维开发者技术经验分享

开发者 https://www.devze.com 2023-03-08 23:37 出处：网络

I have a google map with kmz overlay on my site: <script type=\"text/javascript\"> <!-- var geocoder;

I have a google map with kmz overlay on my site:

<script type="text/javascript"> 
<!--
    var geocoder;
    var map;
    var overlayXml;

    function initialize() {
//      if (GBrowserIsCompatible()) {
        geocoder = new google.maps.Geocoder();

        var latlng = new google.maps.LatLng(25,-24);
        var myOptions = {
            zoom: 2,
            center: latlng,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        }
        map = new google.maps.M开发者_StackOverflowap(document.getElementById("map_canvas"), myOptions);

//        map.setUIToDefault();

        var ctaLayer = new google.maps.KmlLayer('http://linktothe/data.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);
                map.setZoom(10);     
            } else {
                alert("Could not navigate to location. Reason: " + status);
            }
        });
    }

//-->
</script> 

</head> 
<body onload="initialize()" onunload="GUnload()"> 
etc.

There are two problems:

1) When I first go to the page, the overlay is not showing. I have to refresh the page for it to show. I have no idea why that happens. Maybe it's because the overlay is very big (about 3500 markers)? I believe I have already exhausted my options (the file used to be >1MB before I switched to the compressed kmz version).

2) Once I get the overlay to load, it has an unwanted behavior. The map is zoomed out from its initial position to show the whole overlay. How can I control this behavior?