Data Format
The data was recorded under the Robot Operating System ( ROS), and the timestamp used in the data was in Ubuntu system time. Therefore, the format of the dataset is the standard ROS bag file. In other words, the sensor messages follow the standard ROS messages.
GNSS
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Driver: The data from the GNSS receiver is collected based on the ROS driver. Be noted that we also provide the GNSS measurements in RINEX 3.2 format. We suggest using the GNSS RINEX file for further processing.
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Data format:
IMU
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Driver: The data from the IMU is collected based on the ROS driver. The IMU outputs raw acceleration measurements, angular velocity measurements, magnetic measurements, the absolute orientation in quaternion form.
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Data format:
LIDAR
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Driver: The data from the LiDAR is collected based on the ROS driver. The data is saved into PointCloud2 Message.
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Data format (standard PCL point cloud format):
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Timestamp - unit second - ROS timestamp
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X - unit meter - x coordinate in the local 3D Cartesian of each LiDAR frame.
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Y - unit meter - y coordinate in the local 3D Cartesian of each LiDAR frame.
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Z - unit meter - z coordinate in the local 3D Cartesian of each LiDAR frame.
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R - unit - reflectivity value.
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More message types can be found here.
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Monocular Camera
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Driver: The data from the camera is collected based on the ROS driver, and is saved by sensor_msgs/Image Messages.
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Data format (standard PCL point cloud format):
Reference System (GROUND TRUTH)
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Driver: The data from the SPAN-CPT is collected based on the ROS driver.
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Data format:
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Timestamp - unit second - ROS timestamp
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Latitude - unit degree- position in WSG84.
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Longitude- unit degree- position in WSG84.
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Altitude- unit degree- position in WSG84.
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north_velocity- unit m/s - velocity in the local frame.
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east_velocity- unit m/s - velocity in the local frame.
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up_velocity- unit m/s - velocity in the local frame.
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Roll - unit degree - orientation in the local frame.
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Pitch - unit degree - orientation in the local frame.
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Yaw- unit degree - orientation in the local frame.
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More message types can be found here.
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