difference in the out of /rtabmap/localization_pose AND tf_echo base_link map

[Masoumeh]

hi

why does the output of "rostopic echo /rtabmap/localization_pose" is not nearly the same as the output of "rosrun tf tf_echo base_link map"??

Does anybody have any idea?
thanks

[Masoumeh]

Dear @matlabbe

I want to merge /rtabmap/localization_pose into Robot-localization package, but I have noticed that that the output of "/rtabmap/localization_pose" is not nearly the same as  "tf_echo base_link map"!

How can i resolve this issue?
thanks