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slam_gmapping requires a source of odometry, in the form of a tf pusblished from odom to base_link

Either of these can resolve your issue:

• Run robot_pose_ekf, in the case that you have an odometric sensors such as wheel encoders, and a driver for them that can publish an Odom message
• Run laser_scan_matcher if you have no odometric sensors

slam_gmapping requires a source of odometry, in the form of a tf pusblished from odom to base_link

Either of these can resolve your issue:issue. In conjunction to slam_gmapping:

• Run robot_pose_ekf, in the case that you have an odometric sensors such as wheel encoders, and a driver for them that can publish an Odom message
• Run laser_scan_matcher if you have no odometric sensors

slam_gmapping requires a source of odometry, in the form of a tf pusblished from odom to base_link

Either of these can resolve your issue. In conjunction to slam_gmapping:slam_gmapping:

• Run robot_pose_ekf, in the case that you have an odometric sensors such as wheel encoders, and a driver for them that can publish an Odom message
• Run laser_scan_matcher if you have no odometric sensors