Hi alex0230,
Google Maps API provides a LatLngBounds object to which you can add multiple LatLng objects. Then you can pass this to fitBounds() function to set the automatic zoom.
HTML
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=API_Key"></script>
<script type="text/javascript">
var markers = [
<asp: Repeater ID="rptMarkers" runat="server">
<ItemTemplate>
{
"title": '<%# Eval("Name") %>',
"lat": '<%# Eval("Latitude") %>',
"lng": '<%# Eval("Longitude") %>',
"description": '<%# Eval("Description") %>'
}
</ItemTemplate>
<SeparatorTemplate>
,
</SeparatorTemplate>
</asp: Repeater >
];
</script>
<script type="text/javascript">
window.onload = function () {
var infoWindow = new google.maps.InfoWindow();
var map = new google.maps.Map(document.getElementById("dvMap"), {
center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
//Create LatLngBounds object.
var latlngbounds = new google.maps.LatLngBounds();
for (var i = 0; i < markers.length; i++) {
var data = markers[i]
var myLatlng = new google.maps.LatLng(data.lat, data.lng);
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: data.title
});
(function (marker, data) {
google.maps.event.addListener(marker, "click", function (e) {
infoWindow.setContent("<div style = 'width:200px;min-height:40px'>" + data.description + "</div>");
infoWindow.open(map, marker);
});
})(marker, data);
latlngbounds.extend(marker.position);
}
map.setCenter(latlngbounds.getCenter());
map.fitBounds(latlngbounds);
}
</script>
<div id="dvMap" style="width: 500px; height: 500px">
</div>
For more details refer below article.
