Change Google Maps Zoom Level According to Page

gistfile1.txt

add_filter('wpgmp_maps_options','wpgmp_maps_options',2,1);
function wpgmp_maps_options($options,$map) {
  //Here You can change zoom level according to the page.
	if(is_home()) {
		$options['zoom'] = 10;	
	} else if ( is_page('map-locator') ) {
		$options['zoom'] = 15;
	}
	return $options;
}

error here : add_filter('wpgmp_maps_options','wpgmp_maps_options',2,1);

should be add_filter('wpgmp_maps_options','wpgmp_maps_options',1,2);