Hi - well I've finally cracked it. I read the wt more carefully and discovered that where I'd gone wrong was when drawing the five lines onto the map I was going from the top centre to, for example, the top right and stopping, then continuing on to the end, when I should have just been making a continuous uninterrupted line. As soon as I did that I started getting confirmation that I was on the right track. It's so simple now that I know what I should have been doing!! Thanks again anyway. Geezy