12 







10 



■ 



Pi 





O 

 D- 



£ 6 



o 



n 







n 



6 

 J 4 



i 









2 





iMI 



r t t 



"T n 



Yeor 

 Figure 7. Frequency of surveys at Westhampton Beach. 



IV. DATA ANALYSIS 



Copies of the hand-plotted profiles from 1962 to 1968 were digitized 

 at each of the surveyed points using an Auto-Trol 3400 digitizer and the 

 resulting data were stored on magnetic tape. Data collected after 1968 

 were transcribed directly to optical scanner forms (International Business 

 Machines Corporation, 1968) and converted to punchcards automatically. 

 Hand-plotted data were edited for unreasonable values before digitizing. 

 However, it was necessary to edit the directly coded data before storage 

 on magnetic tape. Data corrections were verified with the original sur- 

 vey books or by the surveyors, rather than being arbitrarily made in the 

 office. The basic data for this report are tabulated in Appendix B. 

 Distances (feet) are referenced to the profile line bench mark and 

 elevations (feet) are referenced to the MLW datum. 



The profile data were analyzed for changes in MSL shoreline position 

 (App. C) and changes in unit volume between surveys (App. D) . For pur- 

 poses of analysis, all profile changes were referenced to conditions on 

 the "initial survey date." The initial survey dates for profile lines 1 

 to 11 and 12 to 20 were 11 October 1962 and 9 August 1972, respectively. 

 The distance-elevation coordinates of the MSL-contour intercept with the 

 initial survey on each profile line were then redefined as the origin 

 (0.0) of a new coordinate system to which all subsequent surveys were 



15 



