6003RS0002 



SWANSON, LAWRENCE W., "Photogrammetric Surveys for Nautical Charting-Use of 

 Color and Infrared Photography," Photogrammetric Engineering, Vol.26, No. 1, Mar. 

 1960, pp. 137-141. 

 Keywords: Aerial Photographs, Color Aerial Photographs, Coastal Mapping, Water Depths 

 Article discusses uses of color and black and white infrared photos in the preparation and 

 maintenance of nautical charts by USC&GS and the advantages and disadvantages of these 

 photos. The superior definition of color photos permits identifying objects that previously 

 required field reconnaissance when using only panchromatic film. Color photos show 

 bottom features to depths of 60 to 70 feet in some areas. Water depths measured on a Kelsh 

 Plotter using color photos and corrected for refraction were within ±5 percent of the values 

 from hydrography in a test near the Virgin Islands. This quality is useful in planning 

 nearshore hydrographic surveys, and has been used to plot bottom contours with modified 

 photogrammetric plotters. The superior shorehne delineation on infrared photos is 

 mentioned. 



6004RS0001 



ZEIGLER, JOHN M., "Beach Studies in the Cape Cod Area Conducted During the Period 

 August 1953-April 1960," Reference No. 60-20, Woods Hole Oceanographic Institu- 

 tion, Woods Hole, Mass., Apr. 1960. 

 Keywords: Aerial Photographs, Coastal Changes, Beach Erosion, Tidal Inlets, Cape Cod, 



Massachusetts 

 Report describes beach studies on Cape Cod by Woods Hole Oceanographic Institution 

 scientists supported by the Office of Naval Research. An important part of the study was 

 the use of photos to examine short-term coastal changes. Use of periodic photos was a more 

 feasible approach to monitor changes than field surveys using plane-table mapping. Monthly 

 changes in Nauset Inlet are illustrated by mosaics of photos taken during 1955-58. Drastic 

 changes occurred in the configuration of the inlet. The photos indicate the dynamic nature 

 of many tidal inlets over a brief time. Beach-erosion data obtained from field surveys on the 

 east side of Cape Cod are presented. A brief description is given of a program to annually 

 photograph the Atlantic and Gulf coasts of the United States. 



6012RS0001 

 FORRESTER, W. D., "Plotting of Water Current Patterns by Photogrammetry," Photo- 

 grammetric Engineering, Vol. 26, No. 5, Dec. 1960, pp. 726-736. 

 Keywords: Aerial Photographs, Photogrammetry, Water Currents, Rideau River,Canada 

 Report treats one approach to the use of photogrammetry for measuring water currents by 

 the Canadian Hydrographic Service. Parallax caused by water currents moving objects on the 

 water surface is used to determine the velocities. A field trial in measuring current velocities 

 on the Rideau River in Ottawa, Canada is described and the results are discussed. In the 

 trial, natural foam was used on the water and several white markers were dropped from a 

 bridge into the river. Results were encouraging, but improvements in equipment would have 

 provided better quaUty photos and fewer problems in extracting data from the photos and 

 also improved accuracy. 



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