With the help of the imagemap block processor we can add an html-imagemap to the generated html which is defined in an AsciiDoc document.
See e.g. on : https://www.w3schools.com/html/html_images_imagemap.asp

The areas of the image can point to bookmarks of the asciidoc document helping navigation inside the document.
In case of pdf generator only the image is included by the moment.

AsciiDoc example:

Computer
[imagemap,target="images/workplace.jpg", highlight="yellow,red"]
title="Book" bookmark="bookmark_computer" shape="rect" coords="34,44,270,350"
title="Coffee" bookmark="bookmark_cofee" shape="circle" coords="337,300,44"
title="Phone" bookmark="bookmark_phone" coords="290,172,333,250" shape="rect"
title="Notes" bookmark="bookmark_notes" coords="1,288 35,218 1,207" shape="poly"

Conversion:
> asciidoctor -r ./imagemap-block-processor.rb example.adoc