14 
Terrestrial photogrammetry has been used to establish the dimensions of 
the remaining portions of the fringidarium on the Roman site at Wroxeter, 
England. Other work has been undertaken on the checking of new structures 
photogrammetrically. The shellofa building being constructed from 
pre-fabricated sections on a beam and column system has been photographed in 
order to determine deviations of the beam and column position from their 
theoretical ones, 
All the aforementioned applications have been carried out using a Galileo- 
Santoni Special Type 'A' stereocamera for photography. Plotting and co-ordinate 
recording has been done on a Wild A8 equipped with EK5a co-ordinate recorder. 
ROAD RESEARCH LABORATORY 
A very specialised type of photogrammetry is used for road surface 
measurement, 
ROYAL COMMISSION ON HISTORICAL MONUMENTS 
In 1968 the Commission purchased a Thompson Watts mark II plotter, a 
pair of Galileo Veroplast cameras, a two metre base for the cameras, a Watts 
microptic II theodolite and some other survey equipment. With this equipment a 
photogrammetric unit was set up in the King's Manor at York which started work 
with the preparation of measured drawings of York Minster. Work continues in 
the Minster, but since June 1970 drawings of other York buildings have been 
produced including the Kings Manor, the Merchant Adventurers Hall and New Walk 
Terrace; and the Commission has ventured further afield to record buildings in 
Winchester, Bury St Edmunds, Howden and Durham. 
The Royal Commission National Monuments Record set up in 1965 also 
continues its work which has become increasingly important by current land 
usage and destruction of ancient features. The record is formed by specialist 
air photography for archaeology, and the purchase of suitable vertical commercial 
cover. Specialist photography is obtained from either amateur flyers or from its 
own photographic sorties. The use of an automatic 70 mm camera has made 
possible stereoscopic oblique photography, which not only enables large areas of 
ground to be covered by overlapping material, but also an appreciation of the 
topography, so often lost with single shot oblique photographs. 
Much of the work of the Monuments Record is concerned with recording soil 
and crop marks that indicate buried archaeological features. Many of the marks 
that appear in growing crops are extremely elusive, and experimental work 
using multi-spectral techniques has been undertaken in collaboration with the 
University of Pennsylvania: analysis is now proceeding. 
SURVEY CO-PARTNERSHIP 
The following activities are reported: The survey of 18 500 m® of 
Hampton Court Palace elevations at 1:96 for the Department of the Environment: 
The experimental survey of a ceiling at 1:10 to record structural defects: A 
similar survey of another ceiling at 1:48, plotting hair line cracks to produce a 
stress diagram: Some structural surveys of bridges at 1:50, with selected 
details at 1:10: A survey of the West face of the National Gallery at 1:96 for the 
Department of the Environment, with some 1:1 scale surveys of architectural 
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