hello,
I would like to know the necessary of "rosparam set use_sim_time true " when I build exact map by using gmapping and rviz.
When I used "rosparam set use_sim_time true " before "rosrun gmapping slam_gmapping scan:=base_scan", my map becomes error " No map received" in rviz. If I don't use "rosparam set use_sim_time true " ,The error don't appear.
If I don't use ""rosparam set use_sim_time true " , Can I build exact map?
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