Comment 13 for bug 500125

The coordinate system was based on the smallest units one of their plotters could support, and was set to 25 µm (i.e. 40 units per millimeter, 1016 per inch)

Uniconvertor use 1016 per inch.
In this case, IN; PU0, 40; PD40, 40; PD40, 0; PD0, 0; PD0, 40; PD0, 40; PU;
equal to the square with sides 0.9906 mm

There were problems of scaling objects when importing svg, but they have already been resolved in the trunk sK1.

At this time we are working on improving the import / export svg formta in sK1/Uniconvertor