# How can I position a picture precisely on a page?

I’m new to Latex and I’m trying to place a picture (my university’s logo) at an exact spot on my titlepage. For this, I would like to specify the coordinates on the page at which I would like the picture to be placed.

Up to now, I have written the following code, but it doesn’t work.

\documentclass{article}
%...
\usepackage{tikz}
\usetikzlibrary{calc}
\usepackage{graphicx}

\begin{document}

\begin{titlepage}

\begin{tikzpicture}[overlay, remember picture]
%...
\begin{picture} (10cm, 10cm) (0cm, 0cm)
\put(0.5cm, 0.5cm) {\includegraphics [width=5cm]{logo}}
\end{picture}
%...
\end{tikzpicture}

\end{titlepage}
%...
\end{document}


When I compile it (Pdftex, using TeXShop), the following error message appears:

./Sans-titre.tex:56: Illegal unit of measure (pt inserted).
\setbox
l.56    \begin{picture} (10cm, 10cm) (0cm, 0cm)


Also, I will need to write some text and draw lines at specific spots on my title page, and I fear I will encounter the same problems.

-
Use textpos package, as described here tex.stackexchange.com/questions/6185/… –  alfC Aug 20 '12 at 21:34
If you are using TikZ and the remember picture option to tikzpicture you can place the logo in a \node positioned relative to the current page coordinate. –  Martin Heller Aug 20 '12 at 21:48
How do you want your title page to look like? Can you post a picture of what exactly you have in mind (may be using some other editor like word)? –  Harish Kumar Aug 20 '12 at 23:04

You are mixing two graphic systems (tikz and the original picture environment of latex). With tikz you should place graphics (and text) with nodes:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{calc}
\usepackage{graphicx}

\begin{document}

\begin{titlepage}

\begin{tikzpicture}[overlay, remember picture]
\node[anchor=north west, %anchor is upper left corner of the graphic
xshift=5cm, %shifting around
yshift=-5cm]
at (current page.north west) %left upper corner of the page
{\includegraphics[width=5cm]{tiger}};
\end{tikzpicture}

\end{titlepage}
\end{document}

-
Thanks, this is exactly what I need! –  Percy Aug 21 '12 at 11:38