Google map zoom level.

Source

File: /core/helpers/trips.php
Used by: /core/helpers/trips.php

Parameters
$zoomlevel, $trip_id

Example:

function prefix_wp_travel_trip_zoomlevel( $zoomlevel, $trip_id ) {
    $zoomlevel = 15;
    return $zoomlevel;
}
add_filter( 'wp_travel_trip_zoomlevel', 'prefix_wp_travel_trip_zoomlevel', 12, 2 );