12, Analysis of atmospheric effects on multispectral 
photography taken at high altitude, including Landsat and 
Skylab data. 
13. Mapping the 1973 Mississippi flood using spectral and 
temporal composites. 
14. Mapping the 1973 Indus River flood. 
15. Drainage, hydrostatic and suspended sediment study in 
Lake Ontario basin. 
16. Analysis of the comparative Landsat spectral bands for 
flood mapping. 
Spectral Data personnel have participated in remote sensing pro- 
grams conducted for the U.S. Geological Survey and U.S. Agency for 
International Development in Indonesia and Thailand. 
R. M. TOWILL CORPORATION 
Robert D. Pettit 
With the imminent termination of the United States' administration 
of the Trust Territories of the Pacific Islands, it became imperative 
to differentiate between privately-owned lands and public- or 
government-owned lands, and to resolve foreign claims. Under the 
direction of the District Land Management Officer and Senior Land 
Commissioners in each District, native teams were mobilized in 
each municipality to mark, monument and panel "the private-public" 
boundary, and as many private boundary points as possible. Survey 
crews from R. M. Towill Corporation, Honolulu, Hawaii; and Jones 
Associates, Seattle, Washington, have been in the field since 
October 1974, expanding a control network based on the U.S.G.S. survey 
monuments which were established in 1969. 
The majority of the boundary points will have their positions 
computed by analytical aerotriangulation with conventional surveys 
for unpanelled points. 
Final products will consist of the following: 
1. Aerial photography and mosaics at 1:10,000 and 
1:40,000. 
2. Topographic maps at 1:10,000. 
Orthophoto maps at 1:2,000. 
Cadastral plat maps ranging from 1:100 to 1:1,000.