Re: [MI-L] bitmap file sizes

Wed, 30 Aug 2006 00:24:58 -0700

I would recommend never to use JPG in GIS unless you are working with raster tables. Images get blurred, so always stick to PNG which is lossless.
 
The problems from working with large images in Quark are not really related to MI-L, but here are a few tips based on experience with other software packages and images:
 
1) Don't import the images into quark - link externally if possible.
2) Use PNG format. That prevents the software from compressing a BMP to JPG in the PDF file and introducing blur.
 
Regards
Uffe
 
----- Original Message -----
From: SCISOFT
Sent: Wednesday, August 30, 2006 7:33 AM
Subject: RE: [MI-L] bitmap file sizes

I would suggest that you use the free utility Irfanview to convert BMP to JPG – www.irfanview.com The filesize will be hugely smaller (many times).

Or, if you’re using Windows XP, you should have already installed the Microsoft utility “Windows Picture and Fax Viewer” – to see, browse with Windows Explorer to a folder that has images (.gif, .jpg, .bmp – any of these filetypes), click on one image file, then right-click and choose the Open With menu. If it’s installed, you’ll see the Viewer listed on its sub-menu. The diskette icon at the bottom allows you to save as a small range of different file formats.

IL Thomas
GeoSciSoft  - Perth, Australia

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of adam Canfield
Sent: Wednesday, August 30, 2006 3:03 AM
To: [email protected]
Subject: [MI-L] bitmap file sizes

 

Hi,

     I've been working around this problem for a few years now and I thought I might ask to see if I might be able to simplify my life a bit.

     For most of my maps we take and put them into a desktop publishing program (Quark). The problem I have is that they only turn out good if they are bitmaps and if the dpi are at least 300. So when I create a layout and 'save window as'>bitmap the map is usually about 25mgb, which most programs don't like picture files that big. It bogs everything down. I downloaded a patch for file bloating a few years ago, but as I understand it that really isn't the problem (and it didn't help).

      I have tried just about everything that I know how, different dpi, file formats ect and I still end up with a rather large file which other programs don't like to work with. Most of our books have at least 30 of these picture if not 70. So the desktop publishing program has a hard time with the entire file size, not the least to say turning 1000+ mgb file into a pdf.

     Any advice would be greatly apprectiated.

 

Adam Canfield

Prairie Mapping

Owner/Manager

701-776-6407

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