There are certain devices (such as stereo cameras, 3D lasers, the Kinect sensor, and so on) that provide 3D data—usually in the form of point clouds (organized/ordered or not). For this reason, it is extremely useful to have tools that visualize this type of data. In ROS, we have
rqt_rviz, which integrates an OpenGL interface with a 3D world that represents sensor data in a world representation, using the frame of the sensor that reads the measurements in order to draw such readings in the correct position in respect to each other.
Visualizing data in a 3D world using rqt_rviz
roscore running, start
rqt_rviz (note that
rviz is still valid in ROS Kinetic) with:
$ rosrun rqt_rviz rqt_rviz
We will see the graphical interface ...