Geographic Information System

1. Data Access
2. Raster and Vector Data Description
3. Data Catalog

1. Data Access
The spatial data on this DVD are delivered in two different forms:

• vector data
• raster data

All raster and vector data are stored within an ArcGIS map document ofr_2005-1346.mxd. Refer to Section 2 (Raster and Vector Data) below for more details on file descriptions and locations.

Projection:
Raster data: Universal Transverse Mercator (UTM) Meters, Zone 17, WGS84 Datum.
Vector data: Geographic Coordinate System, WGS84 Datum.

Viewing the data:
The data can be accessed in a number of different ways depending on software availability.

• ArcGIS 9.0 or higher : spatial analyst extension required in order to view and manipulate all data
• ArcView 3.x : spatial analyst extension required in order to view and manipulate all data

ArcGIS 9.0 or higher:
Copy the following folder OFR_2005_1346/ArcGIS to a local computer and open the ArcMap Document ofr_2005-1346.mxd. The ArcMap Document is saved with relative links. Thus, as long as the sub-folders remain under the parent directory (ArcGIS) there is no need to change drive letters or pathways. The ArcGIS map document can also be read directly from the DVD (read-only mode) by opening ofr_2005-1346.mxd.

Requirements: Approximately 1 gigabyte of free space is needed in order to copy the data to a local drive.

ArcView 3.x:
The data can be viewed using ArcView 3.x and the spatial analyst extension.

Data Download:
Raster and Vector data are stored and compressed within zip files in order to facilitate downloads. WinZip files are linked within the Data Catalog. See below for specific download instructions (see Data Catalog).

Raster grids are stored as ASCII raster files with associated metadata in the compressed zip document. The ASCII raster files can be easily converted to ESRI gird format in either ArcView with spatial analyst extension (Import Data Source: ASCII Raster) or ArcGIS with spatial analyst extension (ASCII to Raster). Vector data are stored as shapefiles within the zip document.

If WinZip is not currently installed on the local system, go to WinZip to download the latest version of the WinZip utility.

2. Raster and Vector Data

This section describes the location of the raster and vector data. Raster and vector data are stored as Grids, Image files, or Shapefiles.

Grid: ESRI binary raster data format

Image: Tagged Information File Format TIFF

Shapefile: ESRI file format for point, line or polygon vector data.

Layer File: Symbology for individual shapefiles for use within ArcGIS

ArcGIS folder

This folder contains...

Bathy

1. bathy_grd - Grid: Bathymetry
   
2. bathy_hillsh - Grid: Shaded relief bathymetry
   
3. con_1m.shp - Shapefile: Bathymetric contours at 1 meter interval
   
4. Bathymetry.lyr - Layer File: Symbology for bathymetric grid (bathy_grd)
   

Mosaic

1. mosaic.tif - Image: Sidescan-sonar Mosaic (TIFF)
   
2. mosaic_comp.sid - Image: Sidescan-sonar Mosaic compressed MrSID format
   

NGDC(National Geophysical Data Center)

1. ngdc_crm.tif - Image: NGDC Coastal Relief Model
   

Onshore

1. boreholes.shp - Shapefile: Locations of 158 boreholes located onshore
   
2. boreholes.lyr - Layer File: Symbology for boreholes (boreholes.shp)
   
3. gshydd.shp - Shapefile: South Carolina Hydrography
   
4. gshydd.lyr - Layer File: Symbology for hydrography (gshydd.shp)
   
5. onshore_con.shp - Shapefile: Onshore contours representing the base of the Quaternary section
   
6. onshore_con.lyr - Layer File: Symbology for onshore contours (onshore_con.shp)
   
7. rotasonic.shp - Shapefile: Locations and depth of penetration of eight rotasonic boreholes
   
8. rotasonic.lyr - Layer File: Symbology for onshore boreholes (rotasonic.shp)
   

Samples

1. grabs.shp - Shapefile: Location and textural information of 722 grab samples
   
2. grabs.lyr - Layer File: Symbology for grab samples (grabs.shp)
3. grainsize_poly.shp - Shapefile: Polygons outlining grain size distribution offshore of the Grand Strand
   
4. grainsize_poly.lyr - Layer File: Symbology for grain size distribution (grainsize.shp)

Seisimag

This folder contains JPEG images of seismic-reflection profiles. These images are "hotlinked" to the geophysical tracklines within the ArcMap Document OFR-2005-1346.mxd. Sub-folders within the seisimag directory are organized by cruise number; defined by the calendar year (of data collection) and individual cruise ID (e.g. 00014 [2 Digit YR, 3 Digit Cruise ID]).

Using 'HotLink' within ArcGIS 9.0 or higher:

In order to 'hotlink' to the seismic images, the seismic tracklines must be selected within the Table of Contents. The hotlink feature within the Tools Menu (lightning bolt ) can then be used to display the seismic images associated with an individual trackline.

• Open OFR_2005_1346.mxd
  
  
• Select either Boomer Tracklines or Chirp Tracklines under 'TrackLines' within the Table of Contents
  
• Select the lightning bolt tool and click on an individual trackline to view an image of the seismic data.

Seismic_srf

1. paleoch_grd - Grid: Elevation of paleochannel unconformities
   
2. paleoch_grd.lyr - Layer File: Symbology for paleochannels (paleoch_grd)
   
3. sedthick_grd - Grid: Thickness of Holocene (modern) sediment
   
4. sedthick_grd.lyr - Layer File: Symbology for Holocene sediment thickness (sedthick_grd)
   
5. transgr_grd - Grid: Elevation of the regional transgressive unconformity
   
6. transgr_grd.lyr - Layer File: Symbology for transgressive unconformity (transgr_grd)
   

Sf_env

1. ridge_crests.shp - Shapefile: Location of the crest of low-relief ridges
   
2. ridge_crests.lyr - Layer File: Symbology for ridge crests (ridge_crests.shp)
   
3. seafloorenv.shp - Shapefile: Polygons outlining the sea-floor environments
   
4. seafloorenv.lyr - Layer File: Symbology for sea-floor environments (seafloorenv.shp)

Surficial_geo

1. surf_geol.shp - Shapefile: Polygons outlining the geologic units exposed at the sea floor
   
2. surf_geol.lyr - Layer File: Symbology for surficial geology (surf_geol.shp)

Tracklines

** Within ofr_2005-1346.mxd: Seismic-reflection tracklines are hotlinked to JPGs stored within the seisimag/ directory. **

1. bathy_trk.shp - Shapefile: Swath bathymetric tracklines
   
2. bathy_trk.lyr - Layer File: Symbology for bathymetric tracklines (bathy_trk.shp)
   
3. boomer_sht.shp - Shapefile: Shot points for boomer data
   
4. boomer_sht.lyr - Layer File: Symbology for boomer shot points (boomer_sht.shp)
   
5. boomer_trk.shp- Shapefile: Boomer tracklines
   
6. boomer_trk.lyr - Shapefile: Symbology for boomer tracklines (boomer_trk.shp)
   
7. chirp_sht.shp - Shapefile: Shot points for chirp data
   
8. chirp_sht.lyr - Shapefile: Symbology for chirp shot points (chirp_sht.shp)
   
9. chirp_trk.shp - Shapefile: chirp (seismic-reflection system) tracklines
   
10. chirp_trk.lyr - Shapefile: Symbology for chirp tracklines (chirp_trk.shp)
    
11. sonar_trk.shp - Shapefile: Sidescan-sonar tracklines
    
12. sonar_trk.lyr - Layer File: Symbology for sidescan-sonar tracklines (sonar_trk.shp)

ArcGIS Map Document:

ofr_2005-1346.mxd - ArcMap Document containing all data layers described above.

3. Data Catalog

Downloading Data:
To download vector and raster data, right click on the link within the 'Download Zip File' column in the Data Catalog below. 'Save Target As...' to save a compressed WinZip file to the local hard drive. If WinZip is not currently installed on the local system, go to WinZip to download the latest version of the WinZip utility.

File Description (Metadata)	File Name	View	File Format	File Location	Download Zip File
Bathymetry	bathy_grd		ESRI Grid 32 bit floating point	arcgis/bathy	bathy_grd.zip
Bathymetric Hillshade	bathy_hillsh		ESRI Grid 8 bit integer	arcgis/bathy	bathy_hillsh.zip
Bathymetric Contours (1m)	con_1m		ESRI Shapefile Polyline	arcgis/bathy	con_1m.zip
Sidescan-Sonar Mosaic	mosaic.tif		TIFF 8 bit integer	arcgis/mosaic	mosaic.zip
Sidescan-Sonar Mosaic	mosaic_comp.sid		MrSID Compression	arcgis/mosaic	mosaic_sid.zip
NGDC Coastal Relief Model	ngdc_crm		TIFF Image 8 bit integer	arcgis/ngdc	ngdc_crm.zip
Onshore Borehole Locations	boreholes		ESRI Shapefile Point	arcgis/onshore	boreholes.zip
Hydrography	gshydd		ESRI Shapefile Polygon	arcgis/onshore	gshydd.zip
Onshore Contours: Base of Quaternary	onshore_con		ESRI Shapefile Polyline	arcgis/onshore	onshore_con.zip
Rotasonic Core Locations	rotasonic		ESRI Shapefile Point	arcgis/onshore	rotasonic.zip
Grab Sample Locations	grabs		ESRI Shapefile Point	arcgis/samples	grabs.zip
Grain Size Distribution	GrainSize_poly		ESRI Shapefile Polygon	arcgis/samples	grainsize_poly.zip
Seismic-Reflection Profiles	seisimag.zip		JPEG	arcgis/seisimag	seisimag.zip
Paleochannels	paleoch_grd		ESRI Grid 32 bit floating point	arcgis/seismic_srf	paleoch_grd.zip
Modern Sediment Thickness	sedthick_grd		ESRI Grid 32 bit floating point	arcgis/seismic_srf	sedthick_grd.zip
Transgressive Surface	transgr_grd		ESRI Grid 32 bit floating point	arcgis/seismic_srf	transgr_grd.zip
Ridge Crests	ridge_crests		ESRI Shapefile Polyline	arcgis/sf_env	ridge_crests.zip
Sea Floor Environments	seafloorenv		ESRI Shapefile Polygon	arcgis/sf_env	seafloorenv.zip
Sea Floor Geology	surf_geol		ESRI Shapefile Polygon	arcgis/surficial_geo	surf_geol.zip
Swath Bathymetry Tracklines	bathy_trk		ESRI Shapefile Polyline	arcgis/tracklines	bathy_trk.zip
Boomer Shot Points	boomer_sht		ESRI Shapefile Point	arcgis/tracklines	boomer_sht.zip
Boomer Tracklines	boomer_trk		ESRI Shapefile Polyline	arcgis/tracklines	boomer_trk.zip
Chirp Shot Points	chirp_sht		ESRI Shapefile Point	arcgis/tracklines	chirp_sht.zip
Chirp Tracklines	chirp_trk		ESRI Shapefile Polyline	arcgis/tracklines	chirp_trk.zip
Sidescan-Sonar Tracklines	sonar_trk		ESRI Shapefile Polyline	arcgis/tracklines	sonar_trk.zip

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