The issue with my exterior map is that I scaled it at 1" = 20 feet and it measures 54" x 43", thus the true measure is 1080 feet x 860 feet.

Even if I forget about DPI and stick with pixels only. At 200 pixels every 5 feet, that's 43,200 pixels wide by 34,400 pixels - Xara won't let me export something at that size. In fact Photoshop won't let me create or open an image that is larger than 30,000 x 30,000 pixels.

This means I need to slice my image into multiple pieces, probably in quarters.

I was able to force the dpi down to 50 in Photoshop, but it would still not let me create more than 30,000 pixels in any dimension.

Lastly Kalmarjan describes a maximum normal map size at no large than 100 x 100 feet at 4000 x 4000 pixels. My map is almost 10 times that in dimension. It might be best for me to cut this image into 10 separate maps.

Thoughts?