Thanks Syd, will go and have a look at Bunnings today for a measuring wheel.
That was going to be my next question as to where do I get one. I had googled trundle wheels and found s school supply place; but Bunnings means I can have one today. Bugger to be impatient isnt it.
Justlookin, from my experience as a professional photographer I would say insurance companies want landscape photographs is that a landscape photo taken with a "standard lens" (50mm for the old 35mm cameras and 38mm for modern digitals) will be what you see when looking at the same scene looking directly ahead with your eyes.
And yes it is definately good advice to always wear a safety vest so that some other investigator doesnt have to do a factual on a squished PI.
I always use my big red van with the lights on and hazard lights blaring too. I dont want to take any chances.
Thanks for the info folks.