Alvin Penner wrote:
I think so, unless someone else has a better idea. If it's any consolation the scale factor is predictable, you would need to make your original drawing 80% of its current size. Unless Illustrator allows you to change the screen units. Inkscape assumes that the default resolution is 90 dpi.
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The size difference between the two files is confirmed. The bounding boxes for the two .svg files are given below. Illustrator - width="194.284px" height="75.238px" Inkscape - width="242.855" height="94.04725"
The ratio of the sizes is exactly 1.25 which equals 90/72, which equals the size ratio of a point to a pixel. It looks as though Inkscape has probably assumed that the original dimensions were given in points, and has probably converted them to pixels by multiplying by 90/72, which is a reasonable thing to do. (However, I know nothing about Illustrator, so I don't know if the native units in Illustrator are points or not.
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I believe you are confusing 90 with 96. 96 pixels / inch is the reference standard given in CSS3 (http://www.w3.org/TR/css3-values/#reference), *though*, it's a 'relative' value that is listed as being defined by an angle of vision, 96 is the most common value associated with pixels (happening to be 1.5 * the size of an ADOBE (and web standard) 'point', which is defined as a as a physical unit in HTML as 1/72nd of an inch.
The value of of dots/inch in a photo or Illustrator diagram is settable on a per-image basis. It's initial value will come from the value set in any template you choose (usually 72dpi).
The default dpi in inkscape is set in its preferences under import/export. There you can set the default dpi you wish to use. That the product ships with a default of 90 would seem to be a bug as it doesn't correspond to any standard that I know of (72 or 96 or 100 would have made more sense, with 100 being from the nearest fixed-font size under the X-window system as well as being metric-like and easily subdivided).
Hopefully if you set your Import/Export value to 72 or 96 (72 seems like such low resolution -- it's a very old standard, suitable for type sizing, but not pixels/inch. Remember, print is anything from 150-300 dpi. 72 or 96 would look pretty bad in print. Without Truetype, opentype or similar font-smoothing technology, 96dpi doesn't look very good on the screen, either.
Linda