I have a robot with hokuyo_node one on front and another on back.
Is it possible to use two hokuyo nodes for building map using
slam_gmapping packages?
I launched two hokuyo_nodes that send sensor_msgs/LaserScan to the
same /base_scan topic, but it does not seem to work.

Thanks

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Manabu Saito, JSK lab,University of Tokyo
saito@jsk.t.u-tokyo.ac.jp