\documentclass[a4paper,10pt]{scrartcl}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=3cm]{geometry}
\usepackage{graphicx}
\usepackage{tikz}
\usetikzlibrary{patterns}

%opening
\title{Grapharea}
\author{Dieter Ehlers}

\begin{document}

  \maketitle

  \begin{figure}[h]
    \include{mytikzfigure}
    \caption{The grapharea of Spektrolyst.}
  \end{figure}

\end{document}
