Getting a map can sometimes be a complicated task if you do not have the correct tools. ROS has a tool that will help you build a map using the odometry and a laser sensor. This tool is the map_server (http://www.ros.org/wiki/slam_gmapping). In this example, you will learn how to use the robot that we created in Gazebo, as we did in the previous chapters, to create a map, to save it, and load it again.
We are going to use a .launch file to make it easy. Create a new file in chapter7_tutorials/launch with the name gazebo_mapping_robot.launch and put in the following code:
<?xml version="1.0"?> <launch> <param name="/use_sim_time" value="true" /> <!-- start up wg world --> <include file="$(find gazebo_worlds)/launch/wg_collada_world.launch"/> <arg name="model" /> <param name="robot_description" command="$(find xacro)/xacro.py $(arg model)" /> <node name="spawn_robot" pkg="gazebo" type="spawn_model" args="-urdf...