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 virtual pebbles

Virtual Pebbles  - a free download on sediment sorting
on the Pebble Ridge at Northam Burrows (about 5Mb)

A series of samples at three sites along the Pebble Ridge. All photographs of pebbles are of a 50cm x 50cm quadrat.
On screen measurement of pebbles is possible using a range of on-screen measuring tools e.g.
Screen Calipers v3.2 from Iconico       

 Iconico - Tools and Services for Graphic Designers and Web Developers            Screen Calipers from Iconico - The most accurate way to measure on a screen, at any angle in pixels, inches or any unit.

The free version is of limited use as it only allows measurement on a vertical or horizontal axis.
The full version - currently $19.50 - allows full rotation. Discounts are available for multiple purchases - details on Iconico web site from links above.
 

Virtual Pebbles is  produced by Hallsannery Field Centre 

Telephone : 01237 471564
FAX : 01237 421700
Address : Hallsannery, Bideford, Devon, EX39 5HE , England.
Electronic mail General Information: info@hallsannery.co.uk
Customer Support: pj@hallsannery.co.uk
Support : Peter Jollands Accounts / Administration : Pip Jollands

Directors: Peter Jollands, Dr.Philippa Jollands