Find the midpoint of several locations using google map [duplicate] - ruby-on-rails

Question

This question already has answers here:
Find center of multiple locations in Google Maps
(4 answers)
Closed 8 years ago.
I've wrote a code for my Rails app to show some locations on the google map using the following code:
var myOptions = {
zoom: 2,
center: new google.maps.LatLng(71.1333,27.7000, 13), // **I need to set the center from the locations in here.**
mapTypeId: 'terrain'
};
map = new google.maps.Map($('#search_map_canvas')[0], myOptions);
var addresses = <%=raw search_offering_addressess.to_json %>;
for (var x = 0; x < addresses.length; x++) {
$.getJSON('http://maps.googleapis.com/maps/api/geocode/json?address='+addresses[x]+'&sensor=false', null, function (data) {
var p = data.results[0].geometry.location
var latlng = new google.maps.LatLng(p.lat, p.lng);
new google.maps.Marker({
position: latlng,
map: map
});
});
}
Here, search_offering_addressess contains an array of locations. E.g. ["Berlin, germany", "zurich, switzerland", ....]
How can I find the midpoint of that locations? My map misses some locations marker.

Answer 1

try this using LatLngBounds
//newly added
var bounds = new google.maps.LatLngBounds();
var myOptions = {
zoom: 2,
center: new google.maps.LatLng(71.1333,27.7000, 13), // **I need to set the center from the locations in here.**
mapTypeId: 'terrain'
};
map = new google.maps.Map($('#search_map_canvas')[0], myOptions);
var addresses = <%=raw search_offering_addressess.to_json %>;
for (var x = 0; x < addresses.length; x++) {
$.getJSON('http://maps.googleapis.com/maps/api/geocode/json?address='+addresses[x]+'&sensor=false', null, function (data) {
var p = data.results[0].geometry.location
var latlng = new google.maps.LatLng(p.lat, p.lng);
//newly added
bounds.extend(latlng);
new google.maps.Marker({
position: latlng,
map: map
});
});
}
// Automatically center the map fitting all markers on the screen
map.fitBounds(bounds);