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background knowledge and approaches and techniques concerning problem 
solving and data analysis. 
Teaching 
Several years after its inception, the Remote Sensing Unit expanded its 
activities to include teaching. Primarily this involves offering a 
course option to final year students of the B.Sc Civil Engineering degree 
course. The option attempts to give students a brief introduction to 
Remote Sensing and to indicate how remote sensing systems can be applied 
to civil engineering. Emphasis is on current applications and in this 
context students are trained in the Use of air photo interpretation for 
highway route location, surveys of tips and quarries, and general land 
use mapping. Most of this work tends to be qualitative in nature but 
complements the compulsory photogrammetric work which students under- 
take in earlier years. 
In addition to formal teaching, the Unit offers several final year projects 
with a remote sensing theme, which any final year student can choose to 
study. 
Other teaching has involved more specialised work in presenting short 
intensive courses to bodies interested in the application of remote 
sensing to environmental planning. Emphasis has again been on practical 
applications and participants on the courses have been shown the uses of 
various types of photography in urban land use mapping, derelict and waste 
disposal site surveys, ecological evaluation and the survey of soils and 
vegetation, 
Experience has also been provided at an individual level to students from 
the University of West Indies (UWI) under an exchange scheme whereby UWI 
students attend the Remote Sensing Unit for a year of their postgraduate 
degree course, and in return students from the Unit continue some aspects 
of their research in Jamaica. 
Research 
As stated in the Introduction, the Remote Sensing Unit has concentrated 
on research into the application of proven systems of remote sensing. 
This is because most research projects have developed from a real life 
problem which has required a solution within a given time of usually 
less than a year. In addition projects have been carried out in co- 
operation with agencies involved in environmental planning or resource 
surveys (e.g. county planning authorities, waste disposal authorities). 
These agencies, as well as using data collected by the Unit's research 
staff, have needed to adopt the methodologies developed by those staff 
for their own future use. Thus the techniques have of necessity had to 
be relatively simple in application and to have used easily acquired 
photography or imagery. Since in the main one is dealing with a country 
notorious for its weather conditions, the type of remote sensing system 
used has been restricted to air borne photographic systems with emphasis 
on vertical black and white photography. 
In order that such photography could be used in the fullest way for 
research purposed, the instrumentation mentioned in the Introduction has, 
during the years, been augmented with Old Delft Scanning stereoscopes, 
Wild ST4 Stereoscope fitted with parallel guidance and 3x and 8x 
binoculars, a Wild strip stereoscope, a sketch master and a Carl Zeiss