Readme.1851-1891.edits Oct. 29, 1999 The following files, included in the 1851_1891 workspace, are ARCINFO point coverages of NOS hydrographic survey data located within the Southwest Washington Coastal Erosion Study (SWWCES) study area. All data were originally obtained from the NGDC, and are now 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 *************************** 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 - ***************************** 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. H1379 points were removed where H1378 data exist, per comment on chart. H1019_1868 shifted 1067m north and 73m west, based on T-sheet information. (see /we/gibbs/wa/base/hsheet_shores/Readme.next) to fix registration problem. H335 and H273 have unknown horizontal references. GH1900: Initial data set provided by DOE in 1999 digitized incorrectly. New data points provided by Maarten Buijsman's gh_era1.dat. Per Maarten. Do not use information created prior to Sept 30, 2002. COMPILED DATA SETS: enc18pts_v1: h1018_1868, h1019_1868, h1378_1877, h1379_1877, h1589a_1891, h1800_1887