5009RS0001 

 McCURDY, P. G., "Coastal Delineation from Aerial Photographs," Photogrammetric Engi- 

 neering, Vol. 16, No. 4, Sept. 1950, pp. 550-555. 



Keywords: Aerial Photographs, Coastal Mapping 



Problems common in delineating shorelines from photos for maps and charts are presented. 

 The shoreline, generally taken as the high water line, usually appears as a line between areas 

 with slightly different color (gray) tone on the photos. Another line further inland is the 

 debris line where material accumulates at the highest point of wave runup during high tides. 

 Photos are also used to locate areas of shallow water or other hazards to navigation. 

 Difficulties in using photos to define water depths accurate enough for charts are described. 



5009RS0002 



CAMERON, H. L., "The Use of Aerial Photography in Seaweed Surveys," Photogram- 

 metric Engineering, Vol. 16, No. 4, Sept. 1950, pp. 493-501. 



Keywords: Aerial Photographs, Color Aerial Photographs, Water Penetration, Nearshore 

 Ecology, Nova Scotia, Canada 



Article describes a project along the southern coast of Nova Scotia, to map the distribution 

 of seaweed by photos. Black and white photos taken with conventional cameras using green 

 and red filters, and black and white color photos taken with a Sonne continuous-strip 

 camera were used. The photos taken with a green filter provided more subsurface detail and 

 were better for seaweed mapping than the photos taken with a red filter. Color photos were 

 better than black and wliite in the areas they covered. Seaweed type and distribution could 

 be mapped in water 25 feet deep. Procedures used in planning and executing the mission to 

 ensure that satisfactory photos were taken at selected tidal stages and the interpretation and 

 mapping techniques are described. 



5012RS0001 

 SHEPARD, FRANCIS P., "Photography Related to Investigation of Shore Processes," 



Photogrammetric Engineering,^ ol. 16, No. 5, Dec. 1950, pp. 756-769. 

 Keywords: Aerial Photographs, Coastal Processes 



Paper discusses the uses of ground and aerial photos to study waves, rip currents, beach 

 features, and cycles of erosion. Photos are noted to be particularly useful in studying wave 

 patterns along coastUnes. Rip currents are illustrated by ground and aerial photos. Seasonal 

 cycles of beach erosion and accretion can be investigated with periodic ground or aerial 

 photos. Importance of accurate dating of historical photos is emphasized. 



5012RS0002 

 TEICHERT CURT, and FAIRBRIDGE, R. W., "Photo-Interpretation of Coral Reefs," 

 Photogrammetric Engineering, Vol. 16, No. 5, Dec. 1950, pp. 744-755. 



Keywords: Aerial Photographs, Coastal Mapping, Geological Applications 

 Article presents information to identify and examine coral reefs and features on photos. 

 Types of coral reefs and related features are described. Vertical and obhque photos illustrate 

 coral reefs. Photos taken at low tide and at a scale of 1:5,000 or larger with 60 percent 



