I have this Gtk2 app that displays geotiffs and allows the user to add waypoints to the screen by using Goo::Canvas. I want to go further, I want to add a radar image to the display. I would like to read on how you monks think this could be done, but I do have a few ideas of my own:
*Create a dual Goo::Canvas that overlays over the geotiff image. This will allow the radar to be displayed using gridded coordinates maybe with a pixel size relevant to the radar image (which is probably different from the geotiff.
*Create an image, jpg png etc, that can be overlayed over the Goo::Canvas. This may mean that the image will have a transparent color.