Printing Large Scale Topo Maps USGS 7.5'

Tiffanie's Avatar

Tiffanie

05 Aug, 2018 05:01 PM

Hello! I am trying to print several large scale maps (20x30) for posters that cover about 1/6 the area of Washington state. It appears that the font and lines are slightly blurry when I view the preview (https://caltopo.com/i/0431 as an example). I am using USGS 7.5' and don't think I have any additional layers activated. Are there any tips/tricks on how to get a sharper image? Thanks so much!

Regards,
Tiffanie

  1. Support Staff 1 Posted by matt on 05 Aug, 2018 09:20 PM

    matt's Avatar

    That is a really wide scale - you're taking a map that is natively 1:24k and printing it at almost 1:200k. Short of zooming in and covering less area per page, there may be no way to get a readable resolution out of the map.

    That said, you're also looking at a JPEG image, which applies some JPEG compression to reduce the size. If you set the format at the top left of the print page to PDF, or replace the i with a p in the URL (https://caltopo.com/p/0431), it will give you a PDF that doesn't have the compression applied and should look a little sharper.

  2. 2 Posted by Tiffanie on 06 Aug, 2018 07:30 PM

    Tiffanie's Avatar

    Thank you so much for the quick response. I'll have to relook at my approach for printing large scale maps.

  3. kobe.pole closed this discussion on 20 Sep, 2018 08:38 PM.

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