DOC: Fixing bad export of tikz picture

Documentation/Cookbook/Art/residual_registration-figure.tex

+% How to export:
+% ==============
+% pdflatex img.tex
+% pdftops -eps img.pdf
+% convert -density 300 img.eps img.png
+
+\documentclass[letterpaper,8pt]{article}
+\usepackage[latin1]{inputenc}
+\usepackage[pdftex]{graphicx}
+\usepackage{tikz,amsmath}
+\usetikzlibrary{arrows,snakes,backgrounds,patterns,matrix,shapes,fit,calc,shadows,plotmarks}
+\usepackage[graphics,tightpage,active]{preview}
+\PreviewEnvironment{tikzpicture}
+\PreviewEnvironment{equation}
+\PreviewEnvironment{equation*}
+\newlength{\imagewidth}
+\newlength{\imagescale}
+\pagestyle{empty}
+\thispagestyle{empty}
+\begin{document}
+\begin{tikzpicture}[scale=0.15]
+  \tiny
+    \draw[fill=black!10] (-1,-12) rectangle (75,17);
+     \foreach \x in {5,...,1}
+       \draw[fill=red] (\x,\x) rectangle +(4,4);
+     \node[fill=black!10, text width= 1.5cm] (InputSeries) at
+       (4,-1) {Input series};
+     %\pause
+     \draw[->,thick] (9,5) --  +(3,0);
+     %%\pause
+     \draw[fill=black!30,rounded corners=2pt] (12.2,3) rectangle +(6,4);
+     \node[text width= 0.8cm] (SensorModel) at (15,5) {Sensor Model};
+     %\pause
+     \draw[fill=red!30] (1,-10) rectangle +(4,4);
+     \node[fill=black!10, text width= 1.2cm] (DEM) at
+       (5,-11) {DEM};
+     %\pause
+     \draw[->,thick] (3,-5.5) --  ++(0,3) -- ++(12,0) -- ++(0,5);
+     %\pause
+     \draw[->,thick] (18.5,5) --  +(3,0);
+     %\pause
+     \foreach \x in {5,...,1}
+       \draw[fill=blue,xshift=600pt] (\x,\x) rectangle +(4,4);
+     \node[fill=black!10, text width= 2.8cm] (GeoRefSeries) at
+       (28,-1) {Geo-referenced Series};
+%\pause
+
+
+       \draw[->,thick] (25.5,8.5) --  +(0,3);
+
+     \draw[fill=black!30,rounded corners=2pt] (22,12) rectangle +(8.5,4);
+     \node[text width= 1.5cm] (HomPoExtr) at (27,14) {Homologous Points};
+
+     \draw[->,thick] (21.5,14) --  +(-2.5,0);
+
+     \draw[fill=black!30,rounded corners=2pt] (11,12) rectangle +(8,4);
+     \node[text width= 1.3cm] (BBAdj) at (15.5,14) {Bundle-block Adjustement};
+
+     \draw[->,thick] (15,11.5) --  +(0,-4);
+
+     %\pause
+      \draw[->,thick] (30,5) --  +(3,0);
+      %\pause
+     \draw[fill=black!30,rounded corners=2pt] (33.2,2.5) rectangle +(6,4.5);
+     \node[text width= 0.7cm] (FineRegistration) at (36,4.9) {Fine Registration};
+     %\pause
+
+
+     \draw[->,thick] (39.5,5) --  +(3,0);
+     %\pause
+     \foreach \x in {5,...,1}
+       \draw[fill=green,xshift=1200pt] (\x,\x) rectangle +(4,4);
+     \node[fill=black!10, text width= 1.8cm] (RegistSeries) at
+       (47,-1) {Registered Series};
+     %\pause
+     \draw[->,thick] (36,2) --  ++(0,-10) -- ++(-30,0);
+
+     %\pause
+      \draw[->,thick] (52,5) --  +(3,0);
+      %\pause
+     \draw[fill=black!30,rounded corners=2pt] (55.2,2.5) rectangle +(6,4.5);
+     \node[text width= 0.7cm] (CartoProjection) at (57.5,4.9)
+          {Map Projection};
+     %\pause
+
+
+     \draw[->,thick] (61.5,5) --  +(3,0);
+     %\pause
+     \foreach \x in {5,...,1}
+       \draw[fill=yellow,xshift=1810pt] (\x,\x) rectangle +(4,4);
+     \node[fill=black!10, text width= 1.95cm] (CartoSeries) at
+       (68,-1) {Cartographic Series};
+
+
+     \end{tikzpicture}
+\end{document}

Documentation/Cookbook/rst/recipes/residual_registration.rst

@@ -22,27 +22,7 @@ together with other GIS data.
 This figure illustrates the generic workflow in the case of image series
 registration:
 
-                             +--------------------------+
-                             |       InputSeries        |
-                             +--------------------------+
-                             |       Sensor Model       |
-                             +--------------------------+
-                             |           DEM            |
-                             +--------------------------+
-                             |  Geo-referenced Series   |
-                             +--------------------------+
-                             |    Homologous Points     |
-                             +--------------------------+
-                             | Bundle-block Adjustement |
-                             +--------------------------+
-                             |    Fine Registration     |
-                             +--------------------------+
-                             |   Registered Series      |
-                             +--------------------------+
-                             |     Map Projection       |
-                             +--------------------------+ 
-                             |   Cartographic Series    |
-                             +--------------------------+
+.. image:: ../Art/residual_registration-figure.png
 
 We will now illustrate this process by applying this workflow to
 register two images. This process can be easily extended to perform