I created the wall of the Occupancy grid map using the map2gazebo and inserted it into the Gazebo. Then I brought a turtlebot near this model and ordered it to move using a teleop node, but it went through the wall. The sensor didn't detect the wall at all. What should I do to make collision between the robot and the model? Is the collision element in the sdf file related to this?
map2gazebo : https://github.com/shilohc/map2gazebo