| The
layout of each site varies and although sites were to be photographed
annually since 1980, there are gaps in the sequence.
Each
site has from 1 to 4 lines running parallel and approximately
1m apart. Steel pegs driven into the substrate permanently mark the site, and each
year the pegs are found and tape measures run between them to reconstruct
the lines.
Photographs are taken at 1m intervals along the tape measure, using two Nikonos V
cameras with 28mm U/W lenses. The cameras are mounted 300mm apart on a steel bar, which
in turn is attached to a distance rod with a target cross. |
|
