A location can be added to a resource from the resource view page by scrolling down to the section 'Location data' and clicking on the button 'Add location'. Note, this cannot be added from the Resource Edit page.

On the next page click on the map to set the marker for the location of this resource and click Save.

You can now use the Geographic search to find this resource by dragging an area on the Geographic search map

Advanced - Config options

Change the following config option to true to disable geographic locations.

$disable_geocoding = false;