4701RS0003 

 MOORE, J. G., "The Determination of the Depths and Extinction Coefficients of Shallow 

 Water by Aerial Photography Using Color Filters," Philosophical Transactions of Lhe 

 Royal Society of London, Series A, Vol. 240, No. A816, 1947, pp. 168-217. 

 Keywords: Aerial Photographs, Water Depths, Water Penetration 



A theoretical study of a method for determining water depths from photos is presented. 

 Method is based on water penetration characteristics of different wavelength bands within 

 the visible spectrum. Color filters were used to take photos in which the film was exposed 

 with the desired part of the spectrum. The procedure for taking suitable photos is given. 

 Results obtained from September 1944 to October 1945 are analyzed. Article is an early 

 publication about light penetration characteristics of water. 



4704RS0001 



BEACH EROSION BOARD, "Test of Aerial Photogrammetry in Making Beach Surveys," 



The Bulletin of the Beach Erosion Board, Vol. 1 , No. 1, Apr. 1947, pp. 1-10. 

 Keywords: Aerial Photographs, Photogrammetry. Coastal Mapping, Anna Maria Key, 



Florida 

 A test and cost comparison of compiling topographic maps for a beach -erosion survey by 

 field versus photogrammetry is presented. The test was conducted in cooperation with the 

 Army Map Service at Anna Maria and Longboat Keys, Florida. Probably because of shape 

 and topography of the test area, photogrammetry was not entirely successful in developing 

 the topography and supplemental field surveys were required. Cost of using photo- 

 grammetry was determined to be much greater tiian a field survey using planetable 

 procedures. 



4712RS0001 



DEITZ, ROBERT S. "Aerial Photographs in the Geological Study of Shore Features and 



Processes," P/iotogrammeiric Engineering, Vol. 13, No. 4, Dec. 1947, pp. 537-545. 

 Keywords: Aerial Photographs, Coastal Processes, Coastal Changes, Santa Monica, 



California 

 Capabilities and qualities of photos in studies of shore features and processes are described. 

 Emphasis is on underwater features shown in shallow water and under proper conditions. 

 This permits study of submerged features by direct viewing of photos. Under conditions 

 that prevent submerged features being depicted on photos, indirect methods, such as wave 

 refraction and breaking, can be used to imply water depths. Shore features and processes are 

 more susceptible to geological study because of their clear presentation on photos. As a 

 result of manmade construction, changes in the coasthne at Santa Monica over a 9-year 

 period are illustrated by oblique photos. Photos are concluded to be a prime tool for 

 studying changes in shore features. 



