You are right, I forgot PNG files. I once wanted to test whether they were
as lossless as claimed and whether they are as good as TIFF. However PNG
files are also rasterized and even with TIFF you are downgrading the
quality when you rasterize. So exporting to a vector format able of
managing CMYK colors is the only safe desktop publishing way.
As a side note, GIF files can be compressed at very different rates,
depending on the number of color you have on your maps. With thematic
maps, most of the time you can do with 16 or even only 8 colors. Then I
doubt that you can match the final size with PNG without getting losses.
OF course if you skip the step of defining the maximum number of colors
and take 256 colors, then the size may get higher than with PNG. One need
a good conversion program to get the max out of GIF.
Christiane Roh - Section Statistique Lausanne
Statistique Lausanne - SCRIS
Service cantonal de recherche et d'information statistiques
Rue de la Paix 6, CH-1014 Lausanne
t�l.: +41(021) 316 29 51
fax : +41(021) 316 29 50
"Uffe Kousgaard" <[EMAIL PROTECTED]>
08.12.2004 15:59
Pour : "Mapinfo-L" <[EMAIL PROTECTED]>
cc :
Objet : Re: MI-L SAVE LAYOUT WINDOW AS JPEG - FILE SIZE LIMITATIONS
In my opinion PNG files are superior to GIF files (no license issues, a
bit more compact) unless you want to create animated GIF's. And MapInfo
supports PNG out of the box.
Otherwise I agree, that JPG is only relevant for imagery - never vector
graphics.
Regards
Uffe
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Wednesday, December 08, 2004 3:41 PM
Subject: MI-L R�f. : MI-L FW: SAVE LAYOUT WINDOW AS JPEG - FILE SIZE
LIMITATIONS
Why do you want to create a JPG file ?
JPG files are good for photography, but not really good for graphics and
maps because you will never get clear lines and clean limits to your
poligons, there will always be some smearing due to the compression
algorithm. The best exporting format if you want a raster compressed
format would be GIF. Too bad that MapInfo doesn't offer that.
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