Poor export quality for large images and yellow horizontal lines
I'm creating a large output (90"x55") in ArcMap for printing on a poster and have been testing the results on a letter-sized version of the same page. The exported jpeg of the letter-sized area with 500 dpi at the correct scale looks wonderful. The problem is the output quality is bad when I export as jpeg from the full version, even though the file statistics show that it has the correct number of pixels to achieve 500 dpi across the large area. It also has a number of yellow lines running horizontally across the image. Suggestions?
Mapping Center Answer:
There may be a number of causes.
Let's base one cause as problems after exporting files for print. And this of course varies from printing device to device. But generally, what you are describing has a strong possibility of being a printer memory issue.
The first indicator is the banding that you are seeing in as "the number of yellow lines running horizontally across the image". Since you are trying to print to a magnitude larger, printing a test page at letter size is just a first step. Then, having already looked at the file statistics you need to to examine the printer device information itself. Does it have enough memory to handle the jpeg file and print instructions? Have you tried this size of file before? Is it spitting out an error file anywhere else (check and clear the TEMP file of previous attempted prints)?
Without knowing what your print setup is, we are limited in commenting further.
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