Using the navsat transfrom for position information

edit

Hi,

I am simulating the movement of a jackal robot in gazebo. It comes with a gps sensor. I wanted to use the navsat/fix topic to get the position information of the robot information. Do I need to use the navsat transform to transform the frames from the gps frame to the base_link frame? Can I directly subscribe to the navsat/fix topic to get the information? I am not very clear on the navsat transform and its use. Is there a proper link from where to read information on this?

Regards, rsmitha.