%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 6-7-31 on page 438.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

\documentclass{ttctexagray}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.83385pt}
\setlength\parindent{0pt}
\StartShownPreambleCommands
\usepackage{pstricks,pst-map2d}
% path to data files:
\psset{path=texmf/tex/latex/pstricks/data}

% select a larger unit value to make
% the map larger and more readable:
\psset{level=1,unit=9}

\StopShownPreambleCommands
\begin{document}
\begin{pspicture*}(-4.3,1.25)(-3.5,2.5)
  \WorldMap[rivers=true,USA=true,
            maillage=true]
  \def\psNodeLabelStyle{\tiny}
  \psset{mapCountry=USA,nodeWidth=0.2mm}
  \input{cities.tex}
\end{pspicture*}
\end{document}