Long/Lat Custom Field Meta

Hello,
I have spend hours trying to figure out how I can expose the longitude and latitude meta in the backend.

I understand that these coordinates are stored in the Data Table and would not not accessible in the listings custom field meta out-of-the-box.

I’ve included this is in my snippet plugin with no success.

$lat = geodir_get_post_meta($post_id, 'post_latitude', true);
 $lng = geodir_get_post_meta($post_id, 'post_longitude', true);

Am I missing something?

I’d like to make these meta fields available to my site’s other plugins.

I apologize if my question is at all naive- I’ve spent days trying to troubleshoot this issue to avoid hiring a developer, for what seems to be a fairly simple task.

Thank you in advance.