Stonehenge 181
Image by Stoneshifter
Stonehenge

What no Stonehenge?

Megalithics M
Megalithics Feb 14, 2011 20:20:35
Replying to Rockrich

Rockrich wrote:
I think we may have communicated by email a year or two ago. I was part of the NADRAP team that helped develop a close range methodology for rock art. I use Topcon PI3000 mainly, but ImageMaster sometimes gets thrown in pending loan of dongles.
Yes that's right, thanks once again for all your help back then. We are still using the PI-3000 s/w too, in the training material we saw it seemed that maintaining a uniform above-the-surface-distance was important, so we have always used at least a monopod to ensure this, but it sounds as though we are being too cautious.

R Rockrich
Rockrich Feb 14, 2011 21:00:00
Replying to Megalithics

Megalithics wrote:
Yes that's right, thanks once again for all your help back then. We are still using the PI-3000 s/w too, in the training material we saw it seemed that maintaining a uniform above-the-surface-distance was important, so we have always used at least a monopod to ensure this, but it sounds as though we are being too cautious.
I'll make this one my last comment, because Ive drifted off topic (sorry folks, my fault).

If you apply a 10-15% tolerance to the guidelines on focal distance, camera angles etc you'll still get excellent results. We broke so many photogrammetric rules on NADRAP but proved the robustness of the technique.

If you'd like to drop me another line, then please feel free.

cheers

© 2026 Head Heritage.

Unless otherwise stated, the copyright in each work is the property of the respective contributor. For usage or questions, contact [email protected].