Image Mapping on mediawiki
Image mapping means designating parts of a photo, drawing or screen shot to act as links on a web site. On mediawiki this is implemented with the ImageMap Extension]; it comes with MediaWiki and is enabled on this wiki.
An imagemap is available for File:CCMDB_Description.png - check its wha-links-here to find it, its final location is not clear yet.
One of the tasks in creating an image map is to determine the area of the image that should become the link. https://www.image-maps.com/upload.php is a useful tool for this. You will need to change the output from html to MediaWiki markup, but it still designates the areas pretty well. No login is required even if it initially looks like it.