Использование strictBounds , с широтой границ 85 / -85:
restriction: {
latLngBounds: {
north: 85,
south: -85,
west: -180,
east: 180
},
strictBounds: true
}
подтверждение концепции скрипта
фрагмент кода:
var map;
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
center: {
lat: -34.397,
lng: 150.644
},
zoom: 1,
restriction: {
latLngBounds: {
north: 85,
south: -85,
west: -180,
east: 180
},
strictBounds: true
}
});
}
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
<div id="map"></div>
<!-- Replace the value of the key parameter with your own API key. -->
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap" async defer></script>