This report describes research undertaken to study the geotechnical mechanism of slope failure in road cuttings and landslides in Nepal, using photogrammetry and a minimum of surveyed control. A brief description of analytical photogrammetry and the underlying mathematical principles are given in Section 2. The purpose of a control survey is discussed in Section 3 and the theory of subsequent bundle adjustment is discussed in Section 4. Analytical methods for producing spatial data were developed and are described in Section 5. In Section 6, procedures and instrumentation used to carry out the control survey, computations, derivation and presentation of data are described. Fieldwork (control survey and photography) carried out in 1985 and 1986 is described in Section 7. Results from the different stages (control survey, photography and photogrammetry) are illustrated in Section 8 and a critical discussion of these results from the point of view of the geomorphological changes is given in Section 9. In Section 10, the procedures which were developed are discussed in relation to time and accuracy. The decrease in accuracy and possible savings in cost by using cheaper equipment and less rigorous methods of analysis are discussed in Section 11. Conclusions, including suggestions for future work, are given in Section 12.

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