Enlarging Digital images.
Say Eric and others,
Depending upon the actual size of the sensor in your Digital camera, the setting you were shooting at [such as Fine JPG] and the number of Mega Pixels your various shots were taken at as well as their sharpness determines to what extent the image can be enlarged and produce a good quality image without becomming pixelated.
A sensor size of 23.0 mm x 15.5 mm like the sensor in my Fuji S2, which is smaller than full frame 35 mm, can produce an image that can be enlarged to as large as 44 x 66" if the image was shot at a setting of 6 Megapixels in Fine Jpg mode, properly exposed and a good sharp image produced.
Now with that said it should also be clarified that in the majority of cases you would not want a background image that is going to draw your attention away from the scenery on your layout but add depth to it. So even though all the criteria is meet you will probably want to add some form of blurring to create a more distant effect. This seems to contridict what I said before but it's always better to start with a sharp image and remove clarity as you can't add it to fuzzy images and expect to enlarge them to any extent.
Something else that can be done with various images such as those shown or others shot with the idea of creating a Panorama is to print a long sheet, say 13" wide x 38" or longer and then butt them together to form a wide back drop of your choice of secne or scenes to get an effect that fits your fore-ground scenery.
I've been giving thought to possibly even doing interchangeable scenes at least to correspond with the various times of the year of your liking. Don't forget to shoot sky and cloud shots too for added height and again a way to vary the top row of a Panorama so even if the bottom shots printed to 13 x 38" and butted together to form a long panorama down lower the upper sky shots could be shifted to the right or left to change the effect and vary the overall scene to suite your self and create a different effect.
Again these shots will most always be printed to be somewhat blury so even if they don't exactly butt together perfectly it won't matter too much unless there's a light source that shows through and then some black paper etc can resolve that.
Well thats one of my ideas I've been thinking of doing for some time.
HTH
Ya know, that thought never crossed my mind... They could probably be done up to 20x24". That's a cool idea.
They were taken from one of the hills northeast of the airport. Maybe someone will get a jolt out of them. 
