drawing up - seeking advice

[Patrick Warren]

Guys,

I'm drawing up one of the china caves Wang Long Dong (Duo Ji, Jingxi) 
from our trip in 2003.  It's a river cave, ie very long (several km) and 
thin (5 - 20m). I've drawn it up in rough at A1 at which scale you can 
get a decent amount of the passage detail.  I'm looking for advice how 
to 'professionalise' it.  For previous (smaller) surveys I have been 
scanning the hand-drawn passage walls and details into an image file, 
cleaning it up, and adding text using paint shop pro (but obviously you 
could use anything similar).  However I will struggle to cope with an 
A1-sized 300 dpi image file.

Have you got any wise advice how to get the passage walls + other 
details into a computer in a manageable form?  Hopefully without too 
much expense on CAD packages!  (Assume I can use unix, or MS windows)

Many thanks!

Patrick

PS: If you email me privately off-list, patrick@pjwarren.demon.co.uk, 
I'll be happy to post a summary of the replies.

-- 
Patrick Warren