I assume you mean a drawn form as opposed to a true PDF form. The former would be difficult to parse automatically into inputs. OTOH, a PDF form works exactly

I assume you mean a drawn form as opposed to a true PDF form. The former would be difficult to parse automatically into inputs. OTOH, a PDF form works exactly they way you’d like. Maybe there’s a small market in helping convert one to the other for collecting input from old paper-ish forms.