thanks Pegasus. Really appreciated.

Can people keep an eye out for a Green Scurion on a Green Petzl Vertex helmet with pen style backup light on the helmet. The battery pack of the scurion has reflecctive tape on the back also. I either (like a right muppet) left it on the roof of the car in Pindale near Castelton and drove back...

Now, Now Play nice! I printed off the Therion manual yesterday and have started to have a look at the relevant bits. Think i'm going to need a lot of time to get my head around it, but i'll get there eventually. Sadly this survey wasn't for a cave at all, but a culvert running under a grade 1...

I'm new to all this surveying and mapping. I've got a centreline on survex and am currently drawing up the passage detail. Is there an easy way to overlay the centre line onto google earth or google maps? Preferably if there is a free option, even better. jess