\begin{overpic}[width=0.49\textwidth]{ok10vma_h_28_ol}
\put(1,74){\colorbox{white}{(\sublabel{ok10vma_h_28_ol}) \href{http://dream.misasa.okayama-u.ac.jp/?q=20190307160400-520806}{ok10vma_h_28_ol}}}
%%(\subref{ok10vma_h_28_ol}) \href{ok10vma_h_28_ol}
\color{red}
\put(6.7,55.5){\footnotesize \circle{0.7} \href{http://dream.misasa.okayama-u.ac.jp/?q=20160921191811-443587}{spot of ys_ol_ok10vma@1996}} % 20160921191811-443587 % \vs(-2692.2, -5794.5)
\put(44.4,51.4){\footnotesize \circle{0.7} \href{http://dream.misasa.okayama-u.ac.jp/?q=20190304141434-952304}{spot of ys_ol_ok10vma_h@3}} % 20190304141434-952304 % \vs(-2579.9, -5807.1)
\put(37.1,64.4){\footnotesize \circle{0.7} \href{http://dream.misasa.okayama-u.ac.jp/?q=20190304141435-369714}{spot of ys_ol_ok10vma_h@11}} % 20190304141435-369714 % \vs(-2600.7, -5767.0)
\put(49.4,42.5){\footnotesize \circle{0.7} \href{http://dream.misasa.okayama-u.ac.jp/?q=20190307112321-772435}{spot of to_ol_ok10vma_h@28}} % 20190307112321-772435 % \vs(-2565.5, -5834.4)
%%scale 10 micro meter
\put(1,1){\line(1,0){3.0}}
\end{overpic}