GravityView Maps - Using coordinates example, with values filled-in

gravityview-map-coordinates-filled-in.php

<?php
/**
 * Use the coordinates (Latitude and Longitude) instead of the address to position the markers on the maps
 * 
 * @see https://docs.gravityview.co/article/300-how-can-i-use-the-latitude-and-longitude-form-fields-to-position-map-markers
 *
 * @param array $fields_array Gravity Forms fields IDs containing the latitude and longitude
 * @param GravityView_View $gravityview_view Current View object
 *
 * @return array Array with field IDs of latitude and longitude fields (Example: [ 5, 6 ] ). Empty array if not the form we want to override.
 */
function example_gv_maps_lat_long_fields( $fields_array = array(), $gravityview_view = null ) {

	$form = $gravityview_view->getForm();

	// Only use these fields to provide the coordinates for Form ID #46
	if ( 46 !== (int) $form['id'] ) {
		return $fields_array;
	}

	return array( '6', '7' );
}

add_filter( 'gravityview/maps/markers/lat_long/fields_id', 'example_gv_maps_lat_long_fields', 10, 2 );

Here's an example for several forms with different field IDs:

function example_gv_maps_lat_long_fields( $fields_array = array(), $gravityview_view = null ) {
	$form = $gravityview_view->getForm();
	$formid = (int) $form['id'];
	
	switch ($formid) {
	    case 41: // form ID = 41
	        return array( '1', '2' );
	        break;
	    case 42: // form ID = 42
	        return array( '3', '4' );
	        break;
	    case 43: // form ID = 43
	        return array( '6', '7' );
	        break;
	    default:
	       return $fields_array;
	}

}
add_filter( 'gravityview/maps/markers/lat_long/fields_id', 'example_gv_maps_lat_long_fields', 10, 2 );