Thanks for the advice of using a smaller equirectangular image photo.
I may stick with a larger one as I'd like to include it in some
version of the images as a reference (JPL did something like that on
some of the early panoramic photos from the Mars Rovers.).
--- In PanoToolsNG@yahoogroups.com, Bruno Postle <bruno@...> wrote:
> This isn't such a kludge, it is simpler than you imagine:
> Create your equirectangular image, it doesn't have to have a grid,
> but do make it 360x180 pixels. Load it into your project and use it
> to align points from your photos with known landmarks.
> hugin (and the other front ends) allow fractional pixel coordinates,
> so there is no need to use a huge equirectangular image, just type
> the pixel coordinates as if they were degrees - These will
> correspond because your equirectangular base is 360 pixels wide.