I am trying to reproduce this diagram
So far I have tried
\documentclass[border=10pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{positioning}
\begin{document}
\begin{tikzpicture}[%
node distance=1.5cm,
filled/.style={circle,fill=red,text=white,minimum size=2cm}
]
\node [filled,label=below:{Primary Optical Area}] (1) {1};
\node [right=2cm of 1,filled,label=below:{Strong Fallow Area}] (2) {2};
\node [below=2cm of 1,filled,label=below:{Weak Fallow Area}] (3) {3};
\node [right=2cm of 3,filled,label=below:{Terminal Area}] (4) {4};
\end{tikzpicture}
\end{document}
which results in
which is not quite what I want.
How do I make the coordinate system, so it is equivalent with the first picture?
Best Answer
There are multiple options here. Positioning the lines becomes easier if you place all the nodes relative to (0,0), then you can just do as below.