I have downloaded a raster (jpg) and associated world file (jpgw) from https://qimagery.information.qld.gov.au
I have turned on the option in ArcMap to use the world file to define the coordinates of the raster.
When I bring the file into ArcMap I get the warning that there is an unknown spatial reference.
I have tried editing the spatial reference for the raster in ArcCatalog for the file for a number of common protections used in Australia. I always get the same error. Perhaps I'm just tried the wrong coordinate systems?
Interestingly, when I bring in a raster and world file sourced from nearmap instead, it locates the image in the correct place, without me having the set a spatial reference for the raster, but still gives the "unknown spatial reference" warning.
I've attached the image and world file I'm having trouble with under the following links: