P2os does publish odometry data on the /pose topic and contains: Pose w/ covariance: Pose - {Estimated pose} Point (x,y,z) {x,y,z co-ordinants} Orientation (x,y,z,w quaternion) Covariance matrix Twist w/ covariance Twist Linear (x,y,z) {linear speed} Rotation (x,y,z) {angular rotation speed} Covariance Matrix Hope that helps Matt -----Original Message----- From: ros-users-bounces@code.ros.org [mailto:ros-users-bounces@code.ros.org] On Behalf Of ros-users-request@code.ros.org Sent: Thursday, January 20, 2011 12:00 PM To: ros-users@code.ros.org Subject: ros-users Digest, Vol 11, Issue 20 Send ros-users mailing list submissions to ros-users@code.ros.org To subscribe or unsubscribe via the World Wide Web, visit https://code.ros.org/mailman/listinfo/ros-users or, via email, send a message with subject or body 'help' to ros-users-request@code.ros.org You can reach the person managing the list at ros-users-owner@code.ros.org When replying, please edit your Subject line so it is more specific than "Re: Contents of ros-users digest..."