Analysis 



51. The pier, beach, nearshore, and offshore data were reduced to posi- 

 tion (X, Y) and depth (Z) triplets relative to established monumentation and 

 NGVD, respectively. The data were listed, and a display of the profiles (i.e. 

 distance along the range versus elevation) was generated for visual inspec- 

 tion. After the data were edited, another set of routines was used to compute 

 contour diagrams of the bottom topography and time sequences of bottom eleva- 

 tions at selected locations along the pier. 



Photographic Data 



Aerial 



52. Aerial photography was taken quarterly by using a 9-in. -negative 

 format mapping aerial camera capable of producing black/white and color 

 photography at a scale of 1:12,000. All coverage was at least 60 percent 

 overlap, with flights flown as close as possible to low tide between 1000 and 

 1400 hr with less than 10 percent cloud cover. 



53. The photographs obtained on 1 February, 11 April, and 3 October 

 included flight lines 2 and 3 (Figure 3) , while those obtained on 7 September 

 also included coverage from Cape Henry, Va., to Cape Hatteras, N. C. (flight 

 line 1). 



Beach 



54. Daily color slides of the beach were taken using a 35mm camera from 

 the same location on the pier looking north and south. The location from 

 which each picture was taken as well as the date, time, and a brief descrip- 

 tion of the picture were marked on the slides. An inventory was also 

 maintained. 



27 



