Image split across 2 pages

Question

hoping someone can assist?

I've referred to the link below and am struggling with trying to work out how to get a landscape image to align in the center of a book as I have some large images which I need to spread across to pages. I'm almost there but if you see my MWE you see that the odd page won't go to the spine so it joins up with the other half of the image - just creates a white space - But the white space should be on the left margin of the odd page, not the right margin

**EDIT QUESTION **I took @barbarabeeton suggestion to use the hvfoat package - I got supa excited but then discovered I cant auto-scale down my images to 2x Page size limitation and many of my images are larger in px ratios exceeding the page size requirement - so any suggestions on how I could auto-scale the images either using the hvfloat package or before passing the image to the hvfloat so that my oversize images don't cause hbox overfill or create blank pages before and after the split?

Here is my workaround for the edit on the code above - SO FAR!

However, as you can see the hvfloat puts an ugly page numbering and an unwanted caption. The manual says "either with page number and caption or not....." but I can't see how to do that? - If I remove the caption code it fails - hmmmm

\documentclass[a4paper,twoside,]{book}
\usepackage[top=25.4mm,bottom=25.4mm,left=25.4mm,right=25.4mm]{geometry}
\usepackage{graphicx}
\usepackage{hvfloat}
\usepackage[export]{adjustbox}
\makeatletter
\def\maxwidth{%
  \ifdim\Gin@nat@width>\paperwidth
    \linewidth
  \else
    \Gin@nat@width
  \fi
}
\makeatother
\begin{document}
\hvFloat[doublePAGE,sameHeight,capPos=right,bindCorr=0mm]%
{figure}%
{\includegraphics[doublefullPage,width=2\maxwidth]{image}}%
[A doublepage image with a caption below the right part.]%
{A caption for a double-sided image that will be placed below the right-hand
part of the illustration. The illustration begins on the left edge of the paper.
No further text is placed on the pages. A short form is used for the LOF.
The parameter is \texttt{doublePAGE}}%
{fig:doublePAGE0}
\end{document}

How to include a picture over two pages, left part on left side, right on right (for books)?

\documentclass[a4paper,twoside,]{book}
\usepackage[margin=0in]{geometry}
\usepackage{graphicx}
\usepackage{adjustbox}
\usepackage{afterpage}
\usepackage{placeins}
\usepackage{xcolor}
\makeatletter
\newcommand{\twopagepicture}[4]{%
    \checkoddpage
    \ifoddpage
        \expandafter@firstofone
    \else
        \expandafter\afterpage
    \fi
    {\afterpage{%
    \if #1t%
        \if #2p%
            \thispagestyle{empty}%
            \afterpage{\thispagestyle{empty}}%
        \fi
    \fi
    \begin{figure}[#1]
        \if #2p%
            \if #1t%
                \vspace{-\dimexpr1in+\voffset+\topmargin+\headheight+\headsep\relax}%
            \fi
        \fi
        \makebox[\linewidth][l]{%
        \if #2p\relax
            \let\mywidth\linewidth
            \let\myheight\textheight
            \hskip-\dimexpr1in+\hoffset+\evensidemargin\relax
        \else
            \let\mywidth\linewidth
            \let\myheight\textheight
        \fi
        \adjustbox{trim=0 0 {.50\width} 0,clip}{\includegraphics[width=2\mywidth,height=1\myheight,keepaspectratio=true]{#3}}}%
        \if #2p%
            \if #1b%
                \vspace*{-\dimexpr\paperheight-\textheight-1in-\voffset-\topmargin-\headheight-\headsep\relax}%
            \fi
        \fi
    \end{figure}%
\begin{figure}[#1]
    \makebox[\linewidth][l]{%
    \if #2p%
        \let\mywidth\linewidth
        \hskip-\dimexpr1in+\hoffset+\oddsidemargin\relax
    \else
        \let\mywidth\linewidth
        \let\myheight\textheight
    \fi
    \adjustbox{trim={.50\width} 0 0 0,clip}{\includegraphics[width=2\mywidth,height=1\myheight,keepaspectratio=true]{#3}}}%

\end{figure}%
}}%

}
\makeatother
\begin{document}
\twopagepicture{t}{l}{image}{}
\end{document}

Answer 1

My approach to big problems are the small solutions. I changed the inner and outer margins to check better that two parts are aligned.

\documentclass[a4paper,twoside,]{book}
\usepackage[top=25.4mm,bottom=25.4mm,left=15.4mm,right=25.4mm]{geometry}
\usepackage{graphicx}
\begin{document}
(page 1 )
\newpage
\begin{figure}[p]
\vspace{2cm}
\begin{minipage}[c][.8\textheight][t]{\linewidth}
\includegraphics[trim=0 0 160 0, clip, width=\linewidth]{example-image-16x9}
\end{minipage}
\end{figure}    
%\clearpage
\begin{figure}[p]
\vspace{2cm}
\begin{minipage}[c][.8\textheight][t]{\linewidth}
\includegraphics[trim=160 0 0 0, clip, width=\linewidth]{example-image-16x9}
\caption{A caption for a double-sided image that will be placed below the right-hand
part of the illustration. The illustration begins on the left edge of the paper.
No further text is placed on the pages. A short form is used for the LOF.
The image is in a \texttt{double PAGE}.}
\end{minipage}
\end{figure}    
\clearpage
\end{document}

Answer 2

Ok after a couple of days I came up with a solution that works for me using the good old TIKZ package (even though tizk is pretty hard going for a newbie like me). It may not be the best but it works for my requirements. Pity hvfloats package cant scale images - that package is awesome otherwise.

In this solution, I have added page bleed to 3 sides where images scale to full page, so that the split pictures should align when bound (of course this varies according to specified binding requirements, by shifting the xshift axis, you could also provide for a binding correction as well. I've also included the crop marks just in case

Feel free to offer any improvements :)

\documentclass[a4paper,10pt,twoside]{book}
\usepackage[paperwidth=210mm, paperheight=297mm, top=25.4mm,bottom=25.4mm,left=25.4mm,right=25.4mm]{geometry}
\usepackage{graphicx}
\usepackage[export]{adjustbox}
\usepackage{caption}
\usepackage{tikz}
\usepackage[noinfo, width=216truemm, height=303truemm, cam, pdftex, center]{crop}
%get the image width
\makeatletter
\def\maxwidth{%
  \ifdim\Gin@nat@width>\textwidth
    \linewidth
  \else
    \Gin@nat@width
  \fi
}
\makeatother
\begin{document}
\newlength{\imagewidth}
\settowidth{\imagewidth}{\includegraphics{example-image}}
\thispagestyle{empty}
\begin{tikzpicture}[remember picture,overlay]
   \node [xshift=0mm, yshift=0mm, anchor=east] at (current page.east) {\includegraphics[ max width=\dimexpr\paperwidth+6mm\relax, max height=\dimexpr\paperheight+6mm\relax, trim = 0 0 0.50\imagewidth{} 0, clip, keepaspectratio=true]{example-image}};
\end{tikzpicture}
\newpage
\thispagestyle{empty}
\begin{tikzpicture}[remember picture,overlay]
   \node [xshift=0mm, yshift=0mm, anchor=west] at (current page.west) {\includegraphics[trim = 0.50\imagewidth{} 0 0 0, clip=true, max width=\dimexpr\paperwidth+6mm\relax, max height=\dimexpr\paperheight+6mm\relax,keepaspectratio=true]{example-image}};
\end{tikzpicture}
\end{document}