diff --git a/extensions/preambule_annotation.tex b/extensions/preambule_annotation.tex
new file mode 100644
index 0000000000000000000000000000000000000000..c53c52106829cf8aef927685b835872332c128ee
--- /dev/null
+++ b/extensions/preambule_annotation.tex
@@ -0,0 +1,32 @@
+% Annotation sur une image
+% http://blog.dorian-depriester.fr/latex/tikz/annoter-une-image-avec-tikz
+\usepackage{tikz}
+\newenvironment{annotation}[2][]{
+ \begin{tikzpicture}[]
+ \node[anchor=south west,inner sep=0] (image) at (0,0) {\includegraphics[#1]{#2}};
+ \begin{scope}[x={(image.south east)},y={(image.north west)},style={font=\vphantom{Ag}}]
+}{
+ \end{scope}
+ \end{tikzpicture}
+}
+\def\AnnoSep{0.02} % Marge entre les annotations et l'image
+\newcommand{\BckImg}[2][]{
+ \node[anchor=south west,inner sep=0] (image) at (0,0) {\includegraphics[#1]{#2}};
+}
+\newcommand{\annoLeft}[4][->]{
+ \draw[->,#1, line width=0.5mm,-latex] (0,#2)++(-\AnnoSep,0) node[anchor=east, align=right]{#3} -- (#4);
+}
+\newcommand{\annoRight}[4][->]{
+ \draw[->,#1, line width=0.5mm,-latex] (0,#2)++(+\AnnoSep+1,0) node[anchor=west]{#3} -- (#4);
+}
+\newcommand{\annoUp}[4][->]{
+ \draw[->,#1, line width=0.5mm,-latex] (#2,0)++(0,\AnnoSep+1) node[anchor=south, align=center]{#3} -- (#4);
+}
+\newcommand{\annoDown}[4][->]{
+ \draw[->,#1, line width=0.5mm,-latex] (#2,0)++(0,-\AnnoSep) node[anchor=north, align=center]{#3} -- (#4);
+}
+\newcommand{\help}[1][0.1]{
+ \draw[help lines,xstep=#1,ystep=#1] (0,0) grid (1,1);
+ \foreach \x in {0,1,...,9} { \node [anchor=north] at (\x/10,0) {0.\x}; }
+ \foreach \y in {0,1,...,9} { \node [anchor=east] at (0,\y/10) {0.\y}; }
+}
\ No newline at end of file
diff --git a/extensions/preambule_synoptique.tex b/extensions/preambule_synoptique.tex
new file mode 100644
index 0000000000000000000000000000000000000000..82e01df1feebe6030fb49fd343f700594724fd65
--- /dev/null
+++ b/extensions/preambule_synoptique.tex
@@ -0,0 +1,3 @@
+\usepackage{tikz}
+\usetikzlibrary{shapes, arrows,positioning}
+\usetikzlibrary{svg.path}
diff --git a/extensions/preambule_vanne.tex b/extensions/preambule_vanne.tex
new file mode 100644
index 0000000000000000000000000000000000000000..c2dd3dce1df8b04c7449bef3e6fe150d624e2761
--- /dev/null
+++ b/extensions/preambule_vanne.tex
@@ -0,0 +1,115 @@
+% Dessine une vanne
+\usepackage{ifthen}
+\usepackage{tikz}
+
+% Environnement vanne 3 arguments :
+% 1 - Largeur du dessin en centimètres
+% 2 - Largeur de la vanne (en mètres)
+% 3 - Hauteur de la vanne (en mètres)
+\newenvironment{vanne}[3][\textwidth]{
+
+% Commande pour ajouter une pelle à la vanne
+% Paramètre 1 - ouverture de la vanne
+\newcommand{\pelle}[1]{
+ \fill [white!50!black] (0,##1) rectangle (#2,#3);
+ \ifthenelse{\equal{##1}{0.0} \OR \equal{##1}{0}}{}{ \draw [black, thick, latex-latex] (0.05,0)--(0.05,##1) node [midway,right] {ouverture ##1 m}};
+
+
+}
+
+% Commande pour ajouter un niveau d'eau amont
+% Paramètre 1 - Tirant d'eau
+\newcommand{\tirantamont}[3][0]{
+ \draw [orange!50!black, line width=1pt,dashed] (-0.4*#2,0)--(1.2*#2,0) (-0.4*#2,0) node [black, below, text width = 3cm] {cote du fond~: ##3 m};
+ \pgfmathparse{##2+##3}\let\x\pgfmathresult
+ \pgfmathroundto{\x} \let\cde\pgfmathresult
+ \ifthenelse{\equal{##1}{0}} {\draw [blue, line width=2pt] (-0.4*#2,##2)--(1.2*#2,##2) node [black,midway,above,text width = 3cm] {cote de l'eau~: \cde m}} {\draw [blue, line width=2pt] (-0.4*#2,##2)--(1.3*#2,##2) node [black,midway,below,text width = 3cm] {cote de l'eau~: \cde m}};
+ \ifthenelse{\equal{##2}{0.0} \OR \equal{##2}{0}}{}{ \draw [black, thick, latex-latex] (-0.35*#2,0)--(-0.35*#2,##2) node [midway,left] {tirant d'eau\\amont ##2 m}};
+}
+
+
+% Commande pour ajouter un niveau d'eau aval
+% Paramètre 1 - Tirant d'eau
+\newcommand{\tirantaval}[3][0]{
+ \draw [orange!50!black, line width=1pt,dashed] (-0.2*#2,0)--(1.4*#2,0) node [black, below, text width = 3cm] {cote du fond~: ##3 m};
+ \pgfmathparse{(ceil((##2+##3)*100)/100)}\let\x\pgfmathresult
+ \pgfmathroundto{\x} \let\cde\pgfmathresult
+ \ifthenelse{\equal{##1}{0}} {\draw [blue, line width=2pt] (-0.2*#2,##2)--(1.4*#2,##2) node [black,midway,above,text width = 3cm] {cote de l'eau~: \cde m}} {\draw [blue, line width=2pt] (-0.2*#2,##2)--(1.4*#2,##2) node [black,midway,below,text width = 3cm] {cote de l'eau~: \cde m}};
+ \ifthenelse{\equal{##2}{0.0} \OR \equal{##2}{0}}{}{ \draw [black, thick, latex-latex] (1.35*#2,0)--(1.35*#2,##2) node [midway,right] {tirant d'eau\\aval ##2 m}};
+
+
+}
+
+% Commande pour ajouter un seuil
+\newcommand{\seuil}[1]{
+ \fill [black!25!white] (0,0) rectangle (#2,##1);
+ \draw [orange!50!black, line width=1pt, dashed] (0,0)--(1.4*#2,0);
+ \draw [black, line width=1pt, dashed] (-0.4*#2,##1)--(1.4*#2,##1);
+ \draw [black, thick, latex-latex] (1.35*#2,0)--(1.35*#2,##1) node [midway, right, text width = 3cm] {Seuil de ##1~m};
+
+}
+
+% Commande pour mettre un message en travers du dessin
+\newcommand{\acompleter}{
+ \node at (#2/2,#3/2) [rotate=45,opacity=0.8,red!50!black,font=\Huge] {A compléter};
+}
+
+ \begin{tikzpicture}[scale=#1/(#2*3cm),every node/.style={align=center}]
+ % Mur gauche
+ \fill [orange!50!black] (-0.1*#2,0) rectangle (0,#3);
+ % Mur droit
+ \fill [orange!50!black] (#2,0) rectangle (1.1*#2,#3);
+ % fond du canal
+ \fill [orange!50!black] (-0.1*#2,-0.1*#2) rectangle (1.1*#2,0);
+ % Largeur de la vanne
+ \draw [black, thick, latex-latex] (0,1.1*#3)--(#2,1.1*#3) node [midway,above] at (#2/2,1.1*#3) {largeur #2 m};
+}{
+ \end{tikzpicture}
+}
+
+\newenvironment{vanne_buse}[5][\textwidth]{
+% Environnement vanne 5 arguments :
+% 1 - Largeur du dessin en centimètres (optionel)
+% 2 - Diamètre vanne (en mètres)
+% 3 - Largeur du canal (en mètres)
+% 4 - Bas de la buse par rapport au fond du canal (en mètres)
+% 5 - Haut du canal par rapport au fond (en mètres)
+
+\newcommand{\tirantamont}[3][0]{
+ \draw [orange!50!black, line width=1pt,dashed] (-0.8*#2,-0.5*#2-#4)--(0.8*#2,-0.5*#2-#4) (-0.8*#2,-0.5*#2-#4) node [black, left, below, text width = 3cm] {cote du fond~: ##3 m};
+ % Calcul de la cote de l'eau à partir du tirant d'eau et de la cote du fond. Arrondi à deux décimal
+ \pgfmathparse{(round((##2+##3)*100)/100)}\let\x\pgfmathresult
+ \pgfmathroundto{\x} \let\cde\pgfmathresult
+ \ifthenelse{\equal{##1}{0}}
+ {
+ \draw [blue, line width=2pt] (-0.8*#2,0.5*##2-0.25*#2)--(0.8*#2,0.5*##2-0.25*#2) node [black,midway,above,text width = 3cm] {cote de l'eau~: \cde m}
+ }
+ {
+ \draw [blue, line width=2pt] (-0.8*#2,0.5*##2-0.25*#2)--(0.8*#2,0.5*##2-0.25*#2) node [black,midway,below,text width = 3cm] {cote de l'eau~: \cde m}
+ };
+ \draw [black, thick, latex-latex] (-0.75*#2,-0.5*#2-#4)--(-0.75*#2,0.5*##2-0.25*#2) node [midway,left] {tirant d'eau\\amont ##2 m\\};
+}
+
+% Commande pour ajouter un niveau d'eau aval
+% Paramètre 1 - Tirant d'eau
+\newcommand{\tirantaval}[3][0]{
+ \draw [orange!50!black, line width=1pt,dashed] (-0.8*#2,0.5*#2-#4)--(0.8*#2,0.5*#2-#4) (0.8*#2,0.5*#2-#4) node [black,right, text width = 3cm] {cote du fond~: ##3 m};
+ \pgfmathparse{(ceil((##2+##3)*100)/100)}\let\x\pgfmathresult
+ \pgfmathroundto{\x} \let\cde\pgfmathresult
+ \ifthenelse{\equal{##1}{0}} {\draw [blue, line width=2pt] (-0.8*#2,0.5*##2-0.25*#2)--(0.8*#2,0.5*##2-0.25*#2) node [black,midway,above,text width = 3cm] {cote de l'eau~: \cde m}} {\draw [blue, line width=2pt] (-0.4*#2,##2)--(1.3*#2,##2) node [black,midway,below,text width = 3cm] {cote de l'eau~: \cde m}};
+ \draw [black, thick, latex-latex] (0.75*#2,0.5*#2-#4)--(0.75*#2,0.5*##2-0.25*#2) node [midway,right] {tirant d'eau\\aval ##2 m};
+}
+ \begin{tikzpicture}[scale=#1/(#2*3cm),every node/.style={align=center}]
+ % Fond
+ \fill [white!50!black] (-0.5*#3,-0.5*#2-#4) rectangle(0.5*#3,-0.5*#2+#5-#4);
+ % Diametre extérieur
+ \fill[orange!50!black] (0,0) circle (0.5*#2*1.2);
+ %\fill[gray] (0,0) circle (1cm);
+ % Diametre interieur
+ \fill[white] (0,0) circle (#2*0.5);
+ \draw [black, thick, latex-latex] (-0.5*#2,0.7*#2)--(0.5*#2,0.7*#2) node [midway,above] at (#2,0.7*#2) {largeur #2 m};
+ \draw [black, thick, latex-latex] (0,-0.5*#2-#4)--(0,-#2*0.5) node [midway,right] at (#2,0.7*#2) {hauteur du radier #4 m};
+
+}{
+ \end{tikzpicture}
+}