Readme.1851-1891.edits

Oct. 29, 1999

The following files, included in the 1951_19581 workspace, are ARCINFO point coverages of NOS hydrographic survey data located within the Southwest Washington Coastal Erosion Study (SWWCES) study area.  All data (except H8421) were originally obtained from the NGDC, and are available on the NGDC Marine and Geophysical Tracklines CD-ROM v. 4.x.

For more information contact:
Ann Gibbs, US Geological Survey, 345 Middlefield Rd. MS 999, Menlo Park, CA 94025. agibbs@usgs.gov. Phone: 650-329-5060

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Vertical datum: MLLW meters
Horizontal datum:  NAD83
Reference Ellipsoid: GRS80
Projection:  Washington Stateplane South, Zone 5626, meters

Coverages contain the following items:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  AREA                   4    12     F      3                        -
    5  PERIMETER              4    12     F      3                        -
    9  H4612_1926#            4     5     B      -                        -
   13  H4612_1926-ID          4     5     B      -                        -
   17  DEPTH-MLLW             4     9     F      2                        -
   21  CARTOCODE              3     3     I      -                        -
   24  SURVEY                 7     7     C      -                        -
   31  SURVEY-YEAR            4     4     I      -                        -
   35  X-COORD                4    12     F      3                        -
   39  Y-COORD                4    12     F      3                        -


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The following is a summary of edits applied to the data.  

All -9999 and non-originally coded 711 points were summarily removed from all data sets before our processing.