\documentclass[12pt]{article}
\usepackage{pstricks}
\usepackage{pst-plot}
\usepackage{multido}
\usepackage{pstricks-add}

\begin{document}

\begin{center}

\begin{pspicture}(0,0)(15,8)
\psset{linewidth=2pt}

\psaxes[labels=x]{<->}(1,6)(0,1)(14,7)

\multido{\n=2.1+1.0,\i=4+-1}{4}{%
  \put(0.6,\n){\makebox(0,0)[t]{\i}}}

\psdot*(2,5)

\psframe(2,2)(12,5)

\pcline[offset=-12pt]{|-|}(2,2)(12,2)
\lput*{:U}{Width - 10}

\pcline[offset=12pt]{|-|}(2,2)(2,5)
\lput*{:U}{Height - 3}

% Origin
\pnode(2,5){O}
\uput{2pt}[310](3,4){\rnode{Ot}{\psscalebox{1.1}{
        \vbox{\halign{\hfil#\hfil\cr $(1,1)$\cr\it Box origin\cr}}}}}
\nccurve[angleA=300,angleB=95,arrowsize=4pt,
        nodesepA=2pt,nodesepB=-3pt,linecolor=gray]{<-}{O}{Ot}

\end{pspicture}
\end{center}

\end{document}