Google地图：设置中心，设置中心点和设置更多点 [英] Google Maps: Set Center, Set Center Point and Set more points

问题描述

我使用的是Google Maps V3，我希望：

I am using Google Maps V3 and I want to:

1. 将地图的中心设置为特定的latlng。我正在使用：
   
   

1. Set the center of the map to a particular latlng. I am using:

map.setCenter(new google.maps.LatLng(mylat,mylong));

在该中心点设置一个点。我目前使用：

Set a point in that center spot. I am currently using:

var point = new google.maps.LatLng(mylat,mylong);

marker = map_create_marker(point,"My Popup",map_icon_red);

使用此功能：

With this function:

function map_create_marker(point,html,icon) {
    var marker =    new google.maps.Marker({
        position: point,
        map: map,
        icon: icon,
        shadow: map_icon_shadow
    });

    if(html!="") {
        var infowindow = new google.maps.InfoWindow({
                content: html
        });
        google.maps.event.addListener(marker, 'click', function() {
            infowindow.open(map,marker);
        });
    }
    return marker;
}

使用上面相同的方法放置更多标记

Position many more markers using the same method above

问题是，当我像上面那样设置中心时，它只显示第一个标记。但是如果我不设置中心，它会显示所有标记。我怎样才能让他们工作？

The problem is that when I set the center like above, it only ever displays the first marker. But if I don't set a center it displays all the markers. How can I get them to both work?

以下是完整的javascript代码：

Here is the full javascript code:

<script type="text/javascript"
        src="http://maps.google.com/maps/api/js?sensor=true"></script>
<script type="text/javascript" language="JavaScript">
    var map;

    var map_icon_green = new google.maps.MarkerImage(
        "http://mysite.com/green_pointer.png",
        new google.maps.Size(12,20),
        new google.maps.Point(0,0));

    var map_icon_blue = new google.maps.MarkerImage(
        "http://mysite.com/blue_pointer.png",
        new google.maps.Size(12,20),
        new google.maps.Point(0,0));

    var map_icon_yellow = new google.maps.MarkerImage(
        "http://mysite.com/yellow_pointer.png",
        new google.maps.Size(12,20),
        new google.maps.Point(0,0));

    var map_icon_red = new google.maps.MarkerImage(
        "http://mysite.com/red_pointer.png",
        new google.maps.Size(12,20),
        new google.maps.Point(0,0));

    var map_icon_shadow = new google.maps.MarkerImage(
        "http://mysite.com/shadow.png",
        new google.maps.Size(28,20),
        new google.maps.Point(-6,0));

    var map_crosshair = new google.maps.MarkerImage(
        "http://mysite.com/cross-hair.gif",
        new google.maps.Size(17,17),
        new google.maps.Point(0,0));


    function map_loader() {
        var myOptions = {
            zoom: 5,
            mapTypeId: google.maps.MapTypeId.ROADMAP,
            scrollwheel:false
        }

        map = new google.maps.Map(
                document.getElementById('map_container'), myOptions);

        map.setCenter(new google.maps.LatLng(53.0,-1.0));

        // <![CDATA[
        var point = new google.maps.LatLng(53.0,-4.0755);
        marker = map_create_marker(point,"some html which is OK",map_icon_red);
        // ]]>

        // <![CDATA[
        var point = new google.maps.LatLng(-24.0,25.0);
        marker = map_create_marker(point,"some html which is OK",map_icon_red);
        // ]]>

        // <![CDATA[
        var point = new google.maps.LatLng(54.0,-2.0);
        marker = map_create_marker(point,"some html which is OK",map_icon_red);
        // ]]>

        map.disableDoubleClickZoom = false;
    }


    function map_create_marker(point,html,icon) {
        var marker =    new google.maps.Marker({
            position: point,
            map: map,
            icon: icon,
            shadow: map_icon_shadow
        });

        if(html!="") {
            var infowindow = new google.maps.InfoWindow({
                    content: html
            });
            google.maps.event.addListener(marker, 'click', function() {
                infowindow.open(map,marker);
            });
        }
        return marker;
    }
    var map_set_center = 0;
    function map_load_resize() {
        if(map_set_center==0) {
             map.setCenter(new google.maps.LatLng(53.0,-1.0));
        }
        map_set_center = 1;
    }

    </script>   

推荐答案

请尝试使用v3代码：

gMap = new google.maps.Map(document.getElementById('map')); 
gMap.setZoom(13);      // This will trigger a zoom_changed on the map
gMap.setCenter(new google.maps.LatLng(37.4419, -122.1419));
gMap.setMapTypeId(google.maps.MapTypeId.ROADMAP);

这篇关于Google地图：设置中心，设置中心点和设置更多点的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！