Aaron Spike wrote:
Yes. The first thing I did was to look for the viewbox in the parent SVG element. There isn't one. That is why I figured it must be stored in real-world units. So I sat down and reread the spec. I believe user units can also be decended from a parent element, perhaps my screen?
It's most definitely not stored in real-world units, it's still stored in user units, it's just trickier to find out what they are. If I read the SVG specification they should be in pixels (which is a unit that's coupled to the viewing device). I think it should theoretically not be possible to extract exact (as in device-independent) real-world units from such a document, but I might be wrong. I also don't know how InkScape defines what a pixel is, it might be a constant or it might the definition of your screen, I have no idea.