Using gmaps

#controller
def users_list
      @users = User.all
      
      @close = Location.near(current_user.location.address, 5)
  
      @hash = Gmaps4rails.build_markers(@users) do |user, marker|
        marker.lat user.location.latitude
        marker.lng user.location.longitude
        marker.infowindow user.email
      end
  end 
  
#view
<div style='width: 600px;'>
  <div id="map" style='width: 600px; height: 400px;'></div>
</div>
<script>
handler = Gmaps.build('Google');
handler.buildMap({ provider: {}, internal: {id: 'map'}}, function(){
	markers = handler.addMarkers(<%=raw @hash.to_json %>);

  	handler.bounds.extendWith(markers);
  	handler.fitMapToBounds();
});
</script>