3. Documentation . 



Any program of repeated beach profile surveys requires suitable documenta- 

 tion of the monuments and profile lines. The documentation must include enough 

 information to permit the accurate reestablishment of the' monuments, including 

 pertinent notes on the local conditions in the vicinity of each profile line. 

 Proper documentation ensures the compatibility and comparability of expensive 

 data throughout the life of the study, the adequacy of the information needed 

 to correctly interpret the data, and the capability of reoccupying the profile 

 lines for future comparisons. Essentially, the documentation should allow 

 someone unfamiliar with the study area to quickly and accurately locate and 

 reoccupy the profile lines. It is through documentation that a degree of per- 

 manency is provided the profile lines. 



Considerable information is required to properly document a study area. 

 DA Form 1959, Description or Recovery of Horizontal Control Station (Fig.), is 

 typically available to Corps surveyors and may be used for documentation, 

 although any form that provides adequate documentation is acceptable. 



a. Data on Monuments. 



(1) Type of Monument . Provide a description of the monument or refer- 

 ence point used to locate the position of the base line or profile line in the 

 field. For a profile line, this is typically the landwardmost point (0+00). 



(2) Description of Location . Provide written description of the 

 location of the monument. 



(3) Map Coordinates and Grid Control . If the base line or profile 

 line is referenced to a coordinate system, the grid coordinates and name of the 

 grid to which they refer should be shown for the monument. If the profile con- 

 trol point is not referenced to a U.S. Geological Survey (USGS) or U.S. Coast 

 and Geodetic Survey (USCGS) , now National Ocean Survey (NOS) monument, details 

 on how the coordinates were obtained should be provided. 



(4) Latitude and Longitude . Again, if the base line or profile line 

 is referenced to a coordinate system, the latitude and longitude of the control 

 point should be given. 



(5) Elevation and Datum . The datum to which the control point eleva- 

 tion refers should be provided. If the profile control point is referenced to 

 a permanent monument, the order of the leveling between the two points, the 

 order of the originating points (two originating points are required to verify 

 that these points are accurate), the date the elevation of the profile control 

 point was established, and any information on changes of the profile control 

 point should be listed. 



(6) Tie-in Data . The data of the survey and lengths and angles of the 

 ties between the profile control point and the permanent control points should 

 be given. 



(7) Base Line Data . If the profile line is tied into a surveyed per- 

 manent base line, sufficient information for permanently referencing the pro- 

 file line to the base line should be provided. 



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