I'm having issues including large images in landscape mode

This is about as large as the image will render

Changing the size makes the orientation switch

Ideally I'd like to be able to have a large image on this landscape page, that's the reason that I've made the page landscape.

Also, it's important that the page within the pdf is rotated 90 degrees (which is currently the case), so that when reading the document on a screen I don't have to tilt my head to view landscape pages. I would like to retain that in any solution please.

Here's the example code

documentclass{article}

usepackage[margin=1.0in]{geometry}



% so that i can crop images

usepackage{graphicx}

usepackage{wrapfig}

usepackage{lscape}

usepackage{rotating}

usepackage{epstopdf}

usepackage{pdflscape}

usepackage{showframe}

usepackage[paper=portrait,pagesize]{typearea}





% this is needed for positioning images

usepackage{float}



begin{document}



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Save the image from this link : https://i.imgur.com/CN1gsF4.png

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



% Required this package for including graphics and landscaping

% usepackage[paper=portrait,pagesize]{typearea}

% Link to the stack post

% https://tex.stackexchange.com/a/430619/69118



%%%%%%%%%%%%%%%%

% IMAGE TEST ONE

%%%%%%%%%%%%%%%%



clearpage

newpage

% Probably don't want the header for this page, so suppress it

% thispagestyle{plain}

thispagestyle{empty}

newgeometry{left=1cm,bottom=0.1cm}

KOMAoptions{paper=landscape,pagesize}

recalctypearea

begin{figure}[ht]

    fbox{%

     includegraphics[width=0.7textwidth]{test.png}

    }

end{figure}

newpage

KOMAoptions{paper=portrait,pagesize}

recalctypearea

restoregeometry

cleardoublepage



end{document}

For when / if the image stops being hosted here's it's size :

file image-testing.png 

image-testing.png: PNG image data, 1600 x 1200, 8-bit/color RGBA, non-interlaced

Edit - code for zarko

documentclass{article}



usepackage[margin=1.0in,bottom=1.0in]{geometry}



% so that i can crop images

usepackage{graphicx}

usepackage{wrapfig}

usepackage{rotating}

usepackage{epstopdf}

usepackage{pdflscape}





% this is needed for positioning images

usepackage{float}

usepackage{lipsum}



begin{document}



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Save the image from this link : https://i.imgur.com/CN1gsF4.png

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



% Required this package for including graphics and landscaping

% usepackage[paper=portrait,pagesize]{typearea}

% Link to the stack post

% https://tex.stackexchange.com/a/430619/69118



%%%%%%%%%%%%%%%%

% IMAGE TEST ONE

%%%%%%%%%%%%%%%%



clearpage

newpage



thispagestyle{empty}

begin{landscape}

    centering

thispagestyle{empty}

begin{figure}%[htb]

     includegraphics[width=linewidth]{test.png}

    caption{This is some caption text that I'm using to see what this looks like with caption text. I'm not too sure about 

    adding text in the landscape environment, as I }

end{figure}

end{landscape}





end{document}

• 
  showframe in document with some page in landscape environment doesn't show correct page borders for landscape pages


• in landscape page you should for image width use linewidth since textwidth is not changed


• please use just one package for landscape orientation, not both: lscape and pdflscape (both will give in printed document the same result, but on screen pdflcsape rotate landscape page for simpler view of it content)

the following mwe, in which i omit all packages not relevant to your problem.

documentclass{article}



usepackage[demo]{graphicx}

usepackage{pdflscape}



usepackage{showframe}

usepackage{lipsum}



begin{document}

thispagestyle{empty}

lipsum[1]

begin{landscape}

noindent%

XXX hfill XXX % for show width of text area

begin{figure}[htb]

fbox{

     includegraphics[width=dimexprlinewidth-4fboxsep-2fboxrule]{test.png}

     }

end{figure}

end{landscape}

lipsum[2]

end{document}

gives

addendum:
now with caption and example image (instead it you should use your image) and removed stuff which in previous solution show size of text area.

documentclass{article}

usepackage{geometry}% added  nut it not influence on solution



usepackage{graphicx}

usepackage{pdflscape}



usepackage{lipsum}



begin{document}

thispagestyle{empty}

lipsum[1]

begin{landscape}

    begin{figure}[htb]

includegraphics[width=linewidth]{example-image-duck}% example image provided by "graphicx"

caption{This is some caption text that I'm using to see what this looks like with caption text. I'm not too sure about adding text in the landscape environment, as I use in my real document ... sorry, i can use image provided by you in texttt{igmur}.}

label{fig:landscape}

    end{figure}

end{landscape}

lipsum[2]

end{document}

as you can see,image is centered in text area. since now fbox is removed, the width of image is determined only by linewidth

Just using landscape works fine ( I did my own version of your image, lol).

This solution ensures that when/if printing the page will be printed as usual and the person reading will have to tilt the book but in digital form the pdf is generated with tilted page.

documentclass{article}

usepackage[margin=1.0in]{geometry}

% so that i can crop images

usepackage{graphicx}

usepackage{wrapfig}

usepackage{rotating}

usepackage{epstopdf}

usepackage{pdflscape}

begin{document}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Save the image from this link : https://i.imgur.com/CN1gsF4.png

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



% Required this package for including graphics and landscaping

% usepackage[paper=portrait,pagesize]{typearea}

% Link to the stack post

% https://tex.stackexchange.com/a/430619/69118



%%%%%%%%%%%%%%%%

% IMAGE TEST ONE

%%%%%%%%%%%%%%%%

clearpage

A normal text page

newpage

begin{landscape}

begin{figure}[t]

     includegraphics[width=linewidth,]{image.png}

end{figure}

end{landscape}

newpage

A normal text page

end{document}