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how to specify the accracy of navigation-based on GPS OR SLAM?

asked 2021-12-10 06:24:06 -0500

Delbina gravatar image

hi

I have the output of navigation based on gps, i mean global odometry information (/odometry/filtered_map), and SLAM odometry information output. Now how can i specify the accuracy of this system? How to specify the accuracy of the system?

Thanks

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Are you trying to compare the SLAM solution to the GPS solution?

Tom Moore gravatar image Tom Moore  ( 2021-12-22 06:32:16 -0500 )edit

thanks @ Tom Moore actually, i don't have any ground truth to compare the global filtered-map(output of ekf-global) , and slam odometry information with that one. so I want to specify the accuracy of my global odometry, and slam odometry information with GPS data(considered as ground truth). how can i do this? thanks

Delbina gravatar image Delbina  ( 2021-12-22 08:04:47 -0500 )edit

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answered 2022-01-14 03:07:09 -0500

Tom Moore gravatar image

If I understand you correctly, you have a source of ground truth data and your EKF-filtered state, and you want to compare them so as to quantify the accuracy of the EKF-filtered state.

If it were me, I'd compute the transform between the first pose in your EKF-filtered state (nav_msgs/Odometry message) and the first pose in your ground truth. Then I'd subscribe to the EKF filtered state, transform it into the frame of your ground truth, and then just compare them directly.

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Asked: 2021-12-10 06:24:06 -0500

Seen: 50 times

Last updated: Jan 14