U.S. Geological Survey 2007 1.0 vector digital data Open-File Report 2005-1346 Woods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.3133/ofr20051346 http://pubs.usgs.gov/of/2005/1346/arcgis/sf_env/ridge_crests.zip Baldwin, W.E. Denny, J.F. Schwab, W.C. Gayes, P.T. Morton, R.A. Driscoll, N.W. 2006 1.0 Open-File Report 2005-1346 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/of/2005/1346/ In 1999, the U.S. Geological Survey (USGS), in partnership with the South Carolina Sea Grant Consortium, began a study to investigate processes affecting shoreline change along the northern coast of South Carolina, focusing on the Grand Strand region. Previous work along the U.S. Atlantic coast shows that the structure and composition of older geologic strata located seaward of the coast heavily influences the coastal behavior of areas with limited sediment supply, such as the Grand Strand. By defining this geologic framework and identifying the transport pathways and sinks of sediment, geoscientists are developing conceptual models of the present-day physical processes shaping the South Carolina coast. The primary objectives of this research effort are: 1) to provide a regional synthesis of the shallow geologic framework underlying the coastal upland, shoreface and inner continental shelf, and define its role in coastal evolution and modern beach behavior; 2) to identify and model the physical processes affecting coastal ocean circulation and sediment transport, and to define their role in shaping the modern shoreline; and 3) to identify sediment sources and transport pathways; leading to construction of a regional sediment budget. This data set contains polylines that outline the crests of low-relief ridges mapped within the inner shelf of Long Bay. 2006 publication date Complete None planned -79.156078 -78.616654 33.786952 33.236417 USGS Metadata Identifier USGS:28d045aa-c400-40b6-9d89-4e80a476fb31 None U.S. Geological Survey USGS Woods Hole Science Center WHSC Coastal and Marine Geology Program CMGP grab samples sample texture grain size sea floor environments ridge ridge crests ESRI polyline shapefile interpretive data layer interpretation ISO 19115 Topic Category oceans geoscientificInformation USGS Thesaurus scientific interpretation geologic structure geospatial datasets marine geology None South Carolina North Myrtle Beach Grand Strand Myrtle Beach Surfside Garden City Pawleys Island Waites Island Southeast United States United States Atlantic Ocean None Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information. Jane Denny U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 USA 508-548-8700 x2311 508-457-2310 jdenny@usgs.gov http://pubs.usgs.gov/of/2005/1346/images/ridge_crests.jpg Image of ridge crests within the inner shelf of Long Bay JPEG Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780 Interpretations are based on swath bathymetry and seismic-reflection profiles. No additional checks for topological consistency were performed on the data. Ridge crests were digitized based on swath bathymetric data collected offshore of Myrtle Beach, SC 1999-2003. No additions or modifications are planned. Interpretation of ridge crests was derived from swath bathymetry and seismic-reflection data. The accuracy is dependent on the source data and is assumed to be that of DGPS (2 m). Interpretations of the rideg crests offshore of the Grand Strand, SC were dervied from swath bathymetry and seismic-reflection profiles. Crests were hand digitized within ArcGIS 9.0 at a scale of approximately 1:75000. 2004 Jane Denny U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 USA 508-548-8700 x2311 508-457-2310 jdenny@usgs.gov Edits to the metadata were made to fix any errors that MP v 2.9.32 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. 20160627 U.S. Geological Survey VeeAnn A. Cross Marine Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov USGS Thesaurus keywords added to the keyword section. 20180720 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Crossref DOI link was added as the first link in the metadata. 20191118 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Added keywords section with USGS persistent identifier as theme keyword. 20200908 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Vector String 127 0.000001 0.000001 Decimal degrees D_WGS_1984 WGS_1984 6378137.000000 298.257224 ridge_crests ESRI polyline shapefile ESRI FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. Ridge_ID Ridge field name USGS Cape Romain Shoal Complex Ridge Location USGS LBS Shoal Ridge Location USGS Mottled BS Ridge Location USGS Murrells Inlet Ridge Location USGS Width_KM Ridge width in kilometers classified in half meter intervals USGS Character string Length_M Ridge length in meters USGS 330.4 5855.7 meters 0.5 Heigth_M Ridge height in meters USGS Character string Azimuth_DN Ridge azimuth, clockwise in degrees from north USGS 36.6 161.3 degrees, clockwise from north 1 U.S. Geological Survey mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 USA 508-548-8700 508-457-2310 Downloadable Data Although all data have been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. SHP ArcGIS 9.0 ESRI polyline Shapefile Shapefile contains crests of low-relief ridges offshore of the Grand Strand, SC no compression applied 0.03 http://pubs.usgs.gov/of/2005/1346/arcgis/sf_env/ridge_crests.zip Data can be downloaded via the World Wide Web (WWW) DVD-ROM 4.75 Gbytes UDF None These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com. 20240318 Jane Denny U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 USA 508-548-8700 x2310 508-457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318) FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time None None