> [mailto:[EMAIL PROTECTED]]On Behalf Of Emmanuel Ponette
> Sent: April 2, 1999 8:43 AM
> Subject: MI jpg in MapInfo 4.5 and 5.0
>
> we have to save windows as JPG to put it on our web site. We first did it
> with the version 4.5, and it was OK. When I looked at them with Photoshop,
> I saw the 72 dpi resolution, wich is perfect.
> But I upgraded to version 5 and I went on. But now my JPG file are at 26
> dpi!!!!!!! What happends? Is this a bug? Is there a way to coorect this?
It
> is very important because we use the new thematic maps of version 5.
>
I ran the following test :
1 / preparing a window of a set size (7.37x6.46 cm, why not?),
2 / exporting it as jpg with the size "offered" by MI
3 / opening it in MS Photo editor,
4 / looking at image properties and attempting to restore the original size
in cm by playing with pixels/cm.
I ran 4.5, 5.01 and 5.+(some beta version). In all cases the pixels/cm
required to get the original size were of 47 i.e. ~120 ppi, which is the
density used by MI in all its window exports.
Of course in this case, I did not get exactly the original size because I
was working in cms and not in inches. 120 ppi = 47.24 ppcm but MsPE accepts
only integer values. I was getting an image sized at 7.40x6.49 But this is
beside the point.
Jacques Paris
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gis activity (MapInfo mainly)
http://www.total.net/~rparis/gisproducts.htm
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