基金Acknowledgments The work described in this paper was partially supported by the National Science Foundation under award No. 1504898. The Holoens-AR development work is underway at the Tesseract Center at the University of Arkansas under the direction of Dr. David Fredrick with Keenan Cole, Chloe Costello and undergraduate Corey Booth. Documentation of the Vol Walker construction was done by the Center for Advanced Spatial Technologies （CAST） at the University of Arkansas.
