Have these all been consigned to the dustbin in 0.19? The old evancz/elm-graphics package has not been updated for 2 years and doesn’t appear in the list of searchable packages, so I guess it is unusable now.
What alternatives might there be in 0.19? All I need to do is to retrieve a background picture, layer some objects and lines on top of it, and include it as a [div], formerly using the command .toHtml.
An alternative you have is including the image inside an SVG element and adding on top the other objects and lines you need. You can use elm/svg for that.
There’s also elm-vegalite (which uses the widely adopted Grammar of Graphics) and elm-vega (which uses a D3 type approach). Both work with Elm 0.19. (Disclosure: I am the author of both).
Although for the OP’s tasks, I agree that elm/svg is probably the way to go.