Leading mobile handset vendor Nokia said Monday that it has agreed to acquire German start up Plazes for an undisclosed sum.

Plazes is a privately owned company consisting of just 13 people that runs a ‘context-aware social-activity service’, as they call it, or geo tagging application, as we call it.

The service basically allows users to tag a location with an invite or information, and then let all their friends know about it.

When the deal closes in the third quarter, Plazes will become part of Nokia’s Services & Software unit. It seems likely the Finnish vendor will integrate the application with its own social networking offering, Mosh, as well as the Ovi platform.

“This acquisition helps Nokia to accelerate its vision of bringing people and places closer together, in line with our broader services strategy,” said Niklas Savander, head of Nokia Services & Software. “In addition to the key assets, through this acquisition Nokia will bring on a visionary team with an advanced understanding of social-activity services, as well as the technical ability to further develop this area.”