Is /usr/share/httpd/pgeocode_data a URL within your application or a static file?
(Or is it a file being accessed directly by a view?)
What user/group is your application server running as? (Is it uwsgi, gunicorn, or something else?)
What are the permissions on that file? What are the user and group that own it?
Where are you seeing this error? Is this from a log file? If so, which one?