# TikZ node with includegraphics, and x coordinates

I am using the following LaTeX code to get a TikZ picture that includes a PDF and then draws two nodes:

\begin{figure}
\begin{tikzpicture}
\node (label) at (0,0)[draw=black]{
\includegraphics[width=\textwidth]{my.pdf}
};
\node [draw=red] (A) at (0,0) {1};
\node [draw=red] (B) at (2,0) {2};
\end{tikzpicture}
\caption{Simplest picture.}
\end{figure}


The result looks like this:

+---------------+
|               |
|      1 2      |
|               |
+---------------+
Figure 1


So, the included PDF is centered, and coordinate (0,0), where "1" is drawn, is now in the center of the picture, instead of on the bottom left of the TikZ picture as usual. How can I change it so that (0,0) is still at the bottom left?

It should look like this:

+---------------+
|               |
|               |
|1 2            |
+---------------+
Figure 1


I don't want to have to use negative x coordinates to place my points on the picture.

UPDATE: Here is a screenshot of what it actually looks like. As you can see, the two red boxes are centered and not at the lower-left. (The chain with the arrows is the PDF.)

If I replace the \includegraphics just with an "X" I get the following picture, where the "X" and the "1" are drawn on top of each other (since they are both at coordinate (0,0)).

-
I don't see the behavior your describe. In fact, 1 and 2 show up in the lower-left as expected. Maybe it has to do with the size of the PDF? What if you just put the text 'X' in your "label" node? –  Justin Bailey Jun 16 '11 at 19:40
I added a screenshot that shows the result I'm getting with my PDF. –  Frank Jun 16 '11 at 20:14
What happens when you replace \includegraphics[width=\textwidth]{my.pdf} with X (i.e., get the PDF out of the picture). –  Justin Bailey Jun 16 '11 at 20:23
Then everything is as expected, see the 2nd screenshot I just added. –  Frank Jun 16 '11 at 20:28
Okay, I figured it out. I had to add anchor=south west to the node that includes the picture:
\node [draw=black, anchor=south west] (label) at (0,0) {\includegraphics{my.pdf}};