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How add new graph to mavproxy map?

i would like to ask what is the easiest way to add new graph to mavproxy map?
I am supposted to test some landing optical vision system. Pattern reckognition system detects marker located on the ground and sends DATA32 mavlink message to autopilot. ( It consist of x,y relative coodinate )Then that message is transmitted to Ground Control Computer. I would like to extract data from Data32 message and show it in MAVProxy map module.

Servers by jDrones