Cool, thanks for the info!
Ed Nisley wrote:
40x40 is much smaller then whats on the side of buildings
in the city... I love to know how they deal with such
huge file sizes...
Snuggle up to those images and you'll see that the image
pixels are the size of your finger. The printed halftone
dots are much smaller, of course, but the actual image size
isn't all that large.
Highway billboards, for example, might be 14x48 feet, but
the actual image file is a mere 3.5x12 inches at 600 dpi.
The scale is 1/4" per foot, so 600 dpi translates to a mere
150 dots per *foot*, call it 12 dpi on the billboard.
More than you want to know:
http://www.clearchanneloutdoor.com/assets/downloads/pdf_products/cco-
prod-specs-bulletins14x48.pdf
Those fancy LED billboards smeared all over the roads down
toward the City have even lower resolution, on the order of
two glowing pixels per inch: 400x1400 dots.
More than you want to know about that:
http://www.clearchanneloutdoor.com/assets/downloads/media_kits/2009_national_don.pdf
Now, if you're printing a map that you expect to spread on a
table and look at from a normal reading distance, then all
the rules change... but you probably want a specialized tool
for that job, not a general-purpose photo editor.
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