john smith wrote:
Oh, I'm not planning on selling these. They take maybe 1 hour each to
do. I was just planning on putting them up on my website for all to use.

What software/hardware do you use to vectorize the images?

First, I scan the charts with my scanner from the POH. Then I open the
charts in an image editing program (I use Adobe Photoshop), and rotate
the image so the axes are straight. Then I open the file in Adobe
Illustrator and just use the pen tool to trace over the lines. The
hardest part is making the grid, since the lines aren't perfectly
parallel with each other (I have to do each one individually). All in
all, it takes anywhere from 1 to 2 hours to make a single chart. It's
something I do while I'm at my computer listening to music.

Unfortunately, Illustrator costs like 500$, so unless you have money to
burn, or have other uses for the program, it's not cost effective.
There may be free alternatives to Illustrator, but Illustrator is the
industry standard.