I am trying to draw a tree but unfortunately i have some childs overlap each other,I increased the sibling distance , even i have used the option scale but i have the same problem. here is my code :
\documentclass[openright,a4paper,11pt,french]{report}
\usepackage{tikz}
\usetikzlibrary{arrows,positioning,automata,shadows,fit,shapes}
\begin{document}
\begin{tikzpicture} [scale=.6]
\tikzstyle{level 1}=[sibling distance=60mm]
\tikzstyle{level 2}=[sibling distance=30mm]
\tikzstyle{level 3}=[sibling distance=20mm]
\node{country}
child{node{name}child{node{ France }}}
child{ node{city}child{node{ Paris }}}
child{ node{region}child{node{name}child{node{ Nord-Pas De Calais }}}child{node{population}child{node{ 3996 }}}
child{node{city}child{node{ Lille }}}}child{node{region}child{node{name}child{node{ Valle du Rhone }}}child{node{city}child{node{ Lyon }}}child{node{city}child{node{ Valence }}}};
\end{tikzpicture}
\end{document}
and the result is