How can I edit the GeoIP mapping?

Hi all,

Piwik is implemented in the internal company pages. The visitors have private IP addresses and the geo-location is not working.
Our company has offices all over the world and we want to track which employees use the intranet.
I know all internal IP addresses and the mapping to the geo-locations. So, how can I edit the GeoIP mapping? How can I add this information into the mapping file.

Thx in advance

Lebasi

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