Geo of devices

Hello. I have setuped Observium panel and have added my Linux device as first device. GEO wasn't correct and i have wrote simple script (attached to this topic).

By currently when i try search by location it doesn't work. How i understood by default device should send this info to observium.

How can i correctly automatically resolve Geo coordinates + country / state / city + set location's name ? In logic of developers ? Can't google this info. Thanks much!