occupancy grid mapping in gazebo
roslaunch sim_demo_1 sim_2plus.launch
roslaunch sim_demo_2 demo_2.launch
rostopic pub -r 10 /cmd_vel geometry_msgs/Twist '{linear: {x: 0.2, y: 0, z: 0}, angular: {x: 0, y: 0, z: 0.5}}' or rosrun teleop_twist_keyboard teleop_twist_keyboard.py
roslaunch sim_urdf_gazebo sim_gazebo.launch
roslaunch occ_grid_mapping ogm.launch rosrun teleop_twist_keyboard teleop_twist_keyboard.py