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

1. Data Access
The spatial data in this report are delivered in two different formats:

• raster data
• vector data

Selected raster and vector data can be viewed within an ArcView^® 3.2 project (2008-1195.apr ) or an ArcMap™ 9.2 map document (2008-1195.mxd). Refer to the “Raster and Vector Data Description” section below for details on file descriptions and locations.

Projection:
Raster data: Universal Transverse Mercator (UTM) Meters, Zone 16N, WGS84 Datum (unless accompanied by '_dd' in the file name, in which case they are GeoTIFF images in Geopgraphic Coordinate System, WGS84 Datum.)
Vector data: Geographic Coordinate System, WGS84 Datum.

The base-map data in this report are provided for reference purposes in their original format and coordinate system as published by the Louisiana Oil Spill Coordinator's Office (LOSCO). See the “Basemaps” folder below for a description of these data.

Viewing the data:
The data can be accessed in several ways depending on software availability:

• ArcGIS^® 9.0 or higher
• ArcView^® 3.x
• ArcReader 9.x (available at no cost: http://www.esri.com/software/arcgis/arcreader/download.html)

Viewing the map documents:
ArcView^® 3.x or ArcGIS^® 9.2 or higher:
Copy the GIS_Catalog folder or the GIS_Catalog zip file (765 MB; for www downloads) to a local computer and open the ArcView^® project 2008-1195.apr or the ArcMap™ 9.2 map document 2008-1195.mxd. These map documents are saved with relative links. As long as the file structure remains the same under the parent directory (GIS_Catalog) there is no need to change drive letters or pathways. Approximately 3.8 GB of free space is needed to save the data and extract it to a local drive.

Data download:
Raster and vector data are stored and compressed within zip files in order to facilitate Web downloads. WinZip^® files of the individual data layers are linked within the “Data Preview” section. See below for specific download instructions.

Raster grids are stored as Binary ESRI^® grid format in the GIS_Catalog (including the GIS_Catalog.zip file) and as ASCII raster files within individual data set zip files. The ASCII raster files can be converted easily to ESRI^® grid 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 file.

If WinZip^® is not currently installed on the local system, go to WinZip^® <http://www.winzip.com> to download the latest version of the WinZip^® utility.

2. Raster and Vector Data Description

This section describes the location of the raster and vector data within the folder storage structure of the DVD or Web page. Raster data are delivered as image files, ESRI^® Binary Grids, or ASCII Grids. Vector data are delivered as ESRI^® Shapefiles.

Grid: floating point ASCII with ESRI^® header (individual dataset zip files) and ESRI^® binary grid on disc and GIS_Catalog.zip file.

Image: binary image (TIFF, GeoTIFF, JPEG, MrSID).

Shape file: ESRI^® file format for point, polyline, or polygon vector data.

Layer: ESRI^® symbology file.

GIS_Catalog

This folder contains:

Bathy

1. bathy_grd – Grid: Bathymetry at 50-m resolution
2. bathy_hillsh – Grid: Bathymetric hillshade at 50-m resolution
3. cont_1m.shp – Shapefile: Bathymetric contours at 1-m interval
4. bathy_dd.tif – Image: Color shaded-relief image at 50-m resolution; geographic (TIFF)

Sidescan

1. mosaic1.tif – Image: Sidescan-sonar mosaic at 1-m resolution from 2006 cruise (TIFF)
2. mosaic2.tif – Image: Sidescan-sonar mosaic at 1-m resolution from 2006 cruise (TIFF)
3. mosaic3.tif – Image: Sidescan-sonar mosaic at 1-m resolution from 2006 cruise (TIFF)
4. mosaic4.tif – Image: Sidescan-sonar mosaic at 1-m resolution from 2006 cruise (TIFF)
5. mosaic5.tif – Image: Sidescan-sonar mosaic at 1-m resolution from 2007 cruise (TIFF)
6. mosaic6.tif – Image: Sidescan-sonar mosaic at 1-m resolution from 2007 cruise (TIFF)
7. mosaic7.tif – Image: Sidescan-sonar mosaic at 1-m resolution from 2007 cruise (TIFF)
8. mosaic8.tif – Image: Sidescan-sonar mosaic at 1-m resolution from 2007 cruise (TIFF)
9. mosaic9.tif – Image: Sidescan-sonar mosaic at 1-m resolution from 2007 cruise (TIFF)
10. mosaic_06015.tif – Image: Sidescan-sonar mosaic at 5-m resolution from 2006 cruise (TIFF)
11. mosaic_07007.tif – Image: Sidescan-sonar mosaic at 5-m resolution from 2007 cruise (TIFF)
12. mosaic_06015_dd.tif – Image: Sidescan-sonar mosaic at 5-m resolution from 2006 cruise (TIFF)
13. mosaic_07007_dd.tif – Image: Sidescan-sonar mosaic at 5-m resolution from 2007 cruise (TIFF)

Seisimage

1. 06015 – folder: seismic images from 2006 cruise (JPEGs)
2. 07007 – folder: seismic images from 2007 cruise (JPEGs)

These folders contain JPEG images of seismic-reflection profiles. These images are "hotlinked" to the geophysical tracklines within the ArcView^® project 2008-1195.apr and the ArcMap™ 9.2 map document 2008-1195.mxd. The folders within the “Seisimage” directory are named according to unique Woods Hole Science Center field activity numbers, which are defined by the calendar year (of data collection) and  cruise identifier (for example, 06015 [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 (lightning bolt ) within the tools menu can then be used to display the seismic images associated with an individual trackline.

• Open 2008-1195.apr or 2008-1195.mxd
• Select a seismic trackline in the Table of Contents
• Select the lightning bolt tool and click on an individual trackline to view an image of the seismic data.

Tracklines

** Within 2008-1195.mxd: Seismic-reflection tracklines are hotlinked to JPEGs stored within the“Seisimage” directory. **

1. bathy_trk_06015.shp – Shape file: Swath bathymetric trackline for 2006 cruise
2. bathy_trk_07007.shp – Shape file: Swath bathymetric trackline for 2007 cruise
3. seismic_sht_06015.shp – Shape file: Shot points at 500-shot interval for seismic data for 2006 cruise
4. seismic_sht_07007.shp – Shape file: Shot points at 500-shot interval for seismic data for 2007 cruise
5. seismic_trk_06015.shp – Shape file: Seismic tracklines for 2006 cruise
6. seismic_trk_07007.shp – Shape file: Seismic tracklines for 2007 cruise
7. sidescan_trk_06015.shp – Shape file: Sidescan-sonar tracklines for 2006 cruise
8. sidescan_trk_07007.shp – Shape file: Sidescan-sonar tracklines for 2007 cruise

 

Basemaps

1. landsat5tm_la_lsu_2005.sid – Image: 2005 Landsat Thematic Mapper satellite image of the State of Louisiana. This image was published in 2007 by the Louisiana Oil Spill Coordinator's Office (LOSCO) in UTM Zone 15 NAD 83<http://lagic.lsu.edu/loscoweb> .
2. landwater_interface_la_03ac_LOSCO_2002.shp – Shape file: Land-water interface at 3-acre filtering threshold. This shape file was published in 2004 by the Louisiana Oil Spill Coordinator's Office (LOSCO) in GCS NAD 83 <http://lagic.lsu.edu/loscoweb>.

Map documents:

2008-1195.apr – ArcView^® 3.2 document containing selected data layers described above.

2008-1195.mxd – ArcMap™ 9.2 map document containing selected data layers described above.

3. Data Preview

Downloading data:
To download raster and vector data, right click on the link within the 'Download zip file' column in the table 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	File name (Metadata)	View	File format	File location	Download zip file
Bathymetry (50-m cell size) (UTM)	bathy_grd bathy_grd_asc.asc		ESRI Grid 32 bit floating point (ASCII in zip file)	GIS_catalog/Bathy	bathy_grd.zip (852 KB)
Bathymetric Hillshade (50-m cell size) (UTM)	bathy_hillsh bathy_hillsh_asc.asc		ESRI Grid 8 bit integer (ASCII in zip file)	GIS_catalog/Bathy	bathy_hillsh.zip (84 KB)
Color Shaded-Relief Image (50-m cell size) (Geographic)	bathy_dd.tif		GeoTIFF 8 bit integer	GIS_catalog/Bathy	bathy_dd.zip (596 KB)
Bathymetric Contours (1-m interval) (Geographic)	cont_1m		ESRI Shapefile Polylines	GIS_catalog/Bathy	cont_1m.zip (816 KB)
Sidescan-Sonar mosaic 1 (1-m cell size) (UTM)	mosaic1.tif		TIFF 8 bit integer	GIS_catalog/Sidescan	mosaic1.zip (54.3 MB)
Sidescan-Sonar mosaic 2 (1-m cell size) (UTM)	mosaic2.tif		TIFF 8 bit integer	GIS_catalog/Sidescan	mosaic2.zip (57.2 MB)
Sidescan-Sonar mosaic 3 (1-m cell size) (UTM)	mosaic3.tif		TIFF 8 bit integer	GIS_catalog/Sidescan	mosaic3.zip (27.3 MB)
Sidescan-Sonar mosaic 4 (1-m cell size) (UTM)	mosaic4.tif		TIFF 8 bit integer	GIS_catalog/Sidescan	mosaic4.zip (37.8 MB)
Sidescan-Sonar mosaic 5 (1-m cell size) (UTM)	mosaic5.tif		TIFF 8 bit integer	GIS_catalog/Sidescan	mosaic5.zip (19.3 MB)
Sidescan-Sonar mosaic 6 (1-m cell size) (UTM)	mosaic6.tif		TIFF 8 bit integer	GIS_catalog/Sidescan	mosaic6.zip (28.7 MB)
Sidescan-Sonar mosaic 7 (1-m cell size) (UTM)	mosaic7.tif		TIFF 8 bit integer	GIS_catalog/Sidescan	mosaic7.zip (37.9 MB)
Sidescan-Sonar mosaic 8 (1-m cell size) (UTM)	mosaic8.tif		TIFF 8 bit integer	GIS_catalog/Sidescan	mosaic8.zip (23.6 MB)
Sidescan-Sonar mosaic 9 (1-m cell size) (UTM)	mosaic9.tif		TIFF 8 bit integer	GIS_catalog/Sidescan	mosaic9.zip (19.6 MB)
Sidescan-Sonar mosaic 06015 (5-m cell size) (UTM & Geographic)	mosaic_06015.tif mosaic_06015_dd.tif		TIFF 8 bit integer	GIS_catalog/Sidescan	mosaic_06015.zip (6.1 MB) mosaic_06015_dd.zip (7.5 MB)
Sidescan-Sonar mosaic 07007 (5-m cell size) (UTM & Geographic)	mosaic_07007.tif mosaic_07007_dd.tif		TIFF 8 bit integer	GIS_catalog/Sidescan	mosaic_07007.zip (6.6 MB) mosaic_07007_dd.zip (7.8 MB)
Seismic-Reflection Profiles 06015 07007	seisimage_06015 seisimage_07007		JPEG	GIS_catalog/Seisimage	seisimage_06015.zip (346 MB) seisimage_07007.zip (261 MB)
Swath Bathymetry Tracklines (Geographic)	bathy_trk_06015.shp bathy_trk_07007.shp		ESRI Shapefile Polylines	GIS_catalog/Tracklines	bathy_trk_06015.zip (863 KB)) bathy_trk_07007.zip (5.87 MB)
Seismic Shot Points at 500-shot interval (Geographic)	seismic_sht_06015.shp seismic_sht_07007.shp		ESRI Shapefile Points	GIS_catalog/Tracklines	seismic_sht_06015.zip (375 KB) seismic_sht_07007.zip (266 KB)
Seismic Tracklines (Geographic)	seismic_trk_06015.shp seismic_trk_07007.shp		ESRI Shapefile Polylines	GIS_catalog/Tracklines	seismic_trk_06015.zip (7.2 MB) seismic_trk_07007.zip (9.5 MB)
Sidescan-Sonar Tracklines (Geographic)	sidescan_trk_06015.shp sidescan_trk_07007.shp		ESRI Shapefile Polylines	GIS_catalog/Tracklines	sidescan_trk_06015.zip (374 KB) sidescan_trk_07007.zip (130 KB)
Landsat Thematic Mapper Satellite Image (UTM Zone 15; NAD 83)	landsat5tm_la_lsu_2005.sid		MrSID	GIS_catalog/Basemaps	landsat5tm_la_lsu_2005.zip (42.4 MB)
Land-water Interface (Geographic NAD 83)	landwater_interface_la_03ac_LOSCO_2002.shp		ESRI Shapefile Polygons	GIS_catalog/Basemaps	landwater_interface_la_03ac_LOSCO_2002.zip (45.0 MB)