Revision history [back]

Use slash / for name resolution, i.e. to go deeper into the objects and structures.

In your case it should be something like:

$ rostopic echo /odom/pose/pose/position

It should return x, y and z all of type float64.

That is because Odometry message has field pose which is of type geometry_msgs/PoseWithCovariance, which has another pose of type geometry_msgs/Pose and then there are two fields -- position and orientation.