Hi, I have a collection of floor plans I've done by hand (pen & ink on plain & graph paper) that I'd like to import into OmniGraffle in a workable format, i.e. not as a monolithic image file.

Ideally I'd like OmniG to recognize each line as an element, that is, convert the entire drawing to OmniG symbols that can be dragged, resized, have their attributes changed, etc. Basically like OCR but for simple line drawings rather than alphabet characters.

Is this possible in OmniG, or can anyone recommend a multi-step process, perhaps using 3rd-party apps like Photoshop that would achieve this?

Failing that, can anyone recommend a purpose-built Mac OS X software package that converts line drawings to some kind of CAD-ish format?

Thank you!