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1 | initial version |
roswtf is initialized as an 'anonymous' node. Which is why it's node name has a unique number attached for each launch so that the node name will not collide with any other instances.
See the anonymous initialization option at http://wiki.ros.org/rospy/Overview/Initialization%20and%20Shutdown
It subscribes to /tf
and you are not visualizing new topics but new edges in the graph.