BENCHMARKS continued
Michael
Byrne points out that while the Flush Bracket Benchmark on the
Triangulation Point pillar atop Calton Hill, is undoubtedly a 'mark,
that the actual Trig Pillar itself can also be classed as a 'mark,
because (as the photo shows) the surveyors fixed their equipment into
the mechanics on top of the pillar.
Below:
The 'mark atop of the Trig Point pillar atop
Calton Hill,
Edinburgh, Scotland.
Above:
On Calton Hill, Edinburgh. In the background can be seen the National
Monument of Scotland (left) and Nelson's Monument (centre).
