Check out VectorMagic it’s a fantastic online vectorization tool (I’m not sure why but I like vectorization better with a z than an s – I’m sure I’m not allowed to choose willy nilly like that, but this time I’m just going to).
Basically what it does is take a photo, like so:
And vectorizes is, thusly:
You can set the levels and things online and then download the file to use as you want. Very slick online app.
Thanks Xplane Blog