Ms. Roh,
While it is true that WMF and EMF are vector formats, resolution is
actually a very important consideration if you are going to use the image
in a different size or resolution container than what it was created for.
Unlike raster formats, vector formats scale pretty well. When you generate
a map image, for example, many data points in a region or polyline might
end up as the same pixel. Displaying that WMF in a larger size or
resolution device will not bring back the precision that was in the
original data. If you tell MapInfo Professional that you want higher
resolution when you create the image, that data will not be lost. Also if
you generate a metafile at higher resolution and then print it, that higher
resolution will be used by the printer, even if you cannot see it on your
lower resolution screen.
A few releases ago, we did not let you control the resolution of a WMF or
EMF as these were vector. In fact, under the hood, we were generating these
files at 10 times normal resolution. This was because a number of users
were printing these and wanted the higher resolution. Once we added the
resolution control, it seemed wrong to not let people control this as many
files were much bigger than might be needed. Now, the choice is yours.
Sincerely,
Eric Blasenheim
Software Architect
MapInfo Corporation
Mail List:
[EMAIL PROTECTED]
From: on 05/02/2005 08:58 AM ZE2
To: [EMAIL PROTECTED], <[email protected]>
cc:
Subject: MI-L R�f. : MI-L wmf image size
Sorry, I've missed your mails before the week-end,
Wmfs are representing your maps in vector format and keeps clean lines,
unlike jpgs (which are worse than tiff or gif because the compression
algorithm smears the lines). You can import your files in Photoshops, but
they will be rasterized like in jpg format and raster files are usually
larger files than vector files. I've found that importing wmf files in
Illustrator isn't a solution when your map layers contains many objects,
because Illustrator builds a layer for each object. This problem doesn't
appear with Corel draw.
I'd try simple things first : if your layers contains only one tiny object
(the white house in say the whole street map of Washington), why not
adding it on the drawing layer ? or on another existing layer ?
Also, did anyone notice ? although wmf are vectors and not raster files,
the dialogue box exporting the wmf ask for a resolution ? did you change
something there ? I think this has some influence on the file size. At
first it seems useless for a vector file, unless MIP saves more or less
points for a line depending on the resolution indicated. Did you change
that parameters after drawing the white house ?
I'd be curious to learn more on this resolution parameter in the wmf
exporting dialogue box. Any one knows something about it ?
Vient de para�tre : Lausanne � la carte, le nouvel atlas lausannois
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
"Valerie Scott" <[EMAIL PROTECTED]>
29.04.2005 22:10
Pour : <[email protected]>
cc :
Objet : MI-L wmf image size
Hi All, I have been saving maps as .wmfs. Our communications guy likes
the resolution and quality of them better than .jps, etc.. Here's the
problem: I saved about 24 maps. They ranged from 500 to 1.25 mb. I
went back and added the house of representative layer to all of the maps
(on copies) and saved as .wmfs. They have jumped way up in size (ex:
from 1.08mb to 6.00mb). Communications guy needs them smaller. The only
thing that is different is that added layer. How can I make them smaller
mbs? Does saving them to .wmf keep them as layers somehow? Would they be
able to be made into a single layer in Photoshop? Thanks in advance for
your help!
Thank you,
Valerie
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