% branche graduée :
\begin{scope}[rotate around={\anglealidade:(0,0)}]
%
\filldraw [fill=fond2] (0,0) -- (-\lalidade,0) arc (180:90:2) -- (0,2) -- (0,0) -- ({\rcalen+0.5},0) arc (0:-90:2) -- (0,-2)--(0,0);
%
% hachure pour l'emplacement de la 2e branche :
%\draw [pattern=north east lines, pattern color=gray] (\ralidade,0) -- (0,0) -- (0,-2) -- (-22:\ralidade) arc (-22:0:\ralidade) ;
\filldraw [fill=fond2] (0,0) circle (\ralidade);
\draw (0,0) circle (\ralidade-0.5);
\draw (0,0) circle (2);
%
\draw (-1.3,0) -- (-\ralidade,0) node [pos=0.5, rotate=180+\anglealidade, below, font=\scshape\normalsize] {G$^{\text{d}}$ Méridien de Midi} ;
%
%\begin{scope}[xshift=-25cm,yshift=-0cm, rotate=-12]% scope branche minuit
% branche minuit :
%\filldraw [fill=fond2] (0,0) -- ({\lalidade-2},0) arc (0:-90:2) -- (0,-2)--(0,0);
%
% emplacement pour le pivot des roues :
\fill [fond2]({\decalageroues},-0.01)++ (0.5,0) arc (0:180:0.5) ;
\draw ({\decalageroues},0)++ (0.5,0) arc (0:180:0.5) ;
\draw (\decalageroues,0) node {+} ;
%
\draw ({\lalidade-6.25},-0.75) node [rotate=180+\anglealidade,  font=\scshape\normalsize, align=left] {Date du Mois et\\ Grand Méridien de Minuit} ;
%
%\clip (0,0) rectangle (2,-2) ;
\draw (0,0) node [rotate=\anglealidade] {\includegraphics[width=2cm]{sun}} ;
\draw [decorate, decoration={text along path, text={|\fontsize{8}{8}\scshape\selectfont|le soleil}}] (150:1.2) arc (150:90:1.2) ;
%\end{scope}
% ---------------- fin branche minuit
%
%
\draw (0,0) node [rotate=\anglealidade] {\includegraphics[width=2cm]{sun}} ;
%%%%%%%%%%%%%%%%%%%%%%%%%
% --------- échelle déclinaison :----------%%%%%%%%%%%%%%%%%%%%%%%%%%
	% arc équateur :
\draw [thick] (-\requateur,0) arc (180:174.6:\requateur) node [near end, above, sloped,rotate=\anglealidade] {équateur} ;
	% arc cancer :
\draw [thick] ({-rayon(\eps)},0) arc (180:173:{rayon(\eps)}) node [near end, sloped, align=center,rotate=\anglealidade] {tropique\\du cancer} ;
	% arc capricorne :
\draw [thick] ({-rayon(-\eps)},0) arc (180:176.75:{rayon(-\eps)}) node [pos=0.5, sloped, align=center,rotate=\anglealidade] {tropique du\\~~~~~~capricorne} ;
%
% graduations unité :
\foreach \d in {-23, ..., 23, \eps, -\eps}{
\draw ({-rayon(\d)},0) --++ (0,0.3);
}
%
% chiffraisons :
\foreach \d in {1, 2, ..., 22}{
\draw ({-rayon(\d)},0.22) node [rotate=90+\anglealidade, anchor=west] {\d};
\draw ({-rayon(-\d)},0.22) node [rotate=90+\anglealidade, anchor=west] {\d};
}
% damier :
\foreach \d in {-23, -21, ..., 22}{
\fill ({-rayon(\d)},0.15) rectangle ({-rayon(\d+1)}, 0.25) ;
}
% ligne horizontale :
\draw ({-rayon(\eps)},0.15) -- ({-rayon(-\eps)},0.15) ;
\draw ({-rayon(\eps)},0.25) -- ({-rayon(-\eps)},0.25) ;
%
\draw ({-rayon(12)},1) node [rotate=\anglealidade] {\scshape\footnotesize Déclinaison Septentrionale} ;
\draw ({-rayon(-12)},1) node [rotate=\anglealidade] {\scshape\footnotesize Déclinaison Méridionale} ;

\draw (0,0) node {+} ;

%%%%%%%%%%%%%%%%%%%%%%%%%%
%---------- échelle équation du temps :
%%%%%%%%%%%%%%%%%%%%%%%%%
% lignes verticales
\foreach \e in {0, ...,16}{
\draw ({-rayonedt(\e)},0) --++ (0,0.3);
	\foreach \i in {0.2,0.4,...,0.8}{
		\draw [very thin] ({-rayonedt(\e+\i)},0) --++ (0,0.15) ;
	}
}
% chiffraisons :
\foreach \d in {0, ..., 16}{
\draw ({-rayonedt(\d)},0.22) node [rotate=90+\anglealidade, anchor=west] {\d};
}
% damier :
\foreach \d in {0, 2,..., 16}{
\fill ({-rayonedt(\d)},0.15) rectangle ({-rayonedt(\d+1)}, 0.25) ;
}
% ligne horizontale :
\draw [very thin]({-rayonedt(0)},0.15) -- ({-rayonedt(17)},0.15) ;
\draw [very thin]({-rayonedt(0)},0.25) -- ({-rayonedt(17)},0.25) ;
%
\draw ({-rayonedt(8)},1) node [rotate=\anglealidade]{\scshape\small Équations du Soleil} ;
\end{scope} % fin scope rotation alidade