Appendix 1 - Geographic Information System
A1.1. Data Access
The spatial data on this DVD are delivered as:
- individual vector and raster datasets.
- part of a pre-assembled ArcMap or ArcReader project.
All spatial data can be accessed individually using the table below (link) or by viewing the GIS directory (link) using Windows Explorer or ArcCatalog. Note, all raster data including ESRI grids (bathymetry), ESRI georeferenced tiffs (backscatter), and hyperlinked images (bottom photos and sediment grab photos) are in their native form. Refer to section A1.2 below for more details on where they are located on the DVD.
All data are in Universal Transverse Mercator (UTM) Meters, Zone 19, WGS84 Datum.
Viewing the data:
The complete data sets from this project can be accessed in four different ways depending on the software availability.
- If you have ArcGIS 9.0 or higher - view and manipulate all data
- If you do not have any GIS software - view all data (free software, ArcReader download required, see below for details)
- If you have ArcView 3.x - view all data (bathymetry, sidescan sonar mosaic, shapefiles of the bottom photograph and sediment sample locations. Note: Users will need to have Spatial Analyst to view any data in ESRI Grid format).
- Web pages - view some data (bottom photos, surface sample photos, and maps of bathymetry and sidescan sonar mosaic) as images throughout this report.
If you have ArcGIS 9.0 or higher:
Copy the following folder gis/OFR_2006_1008 to your computer and open the ArcMap document ofr2006_1008.mxd. This will open up an ArcMap document with most of the data layers loaded in the table of contents. The ArcMap project is saved with relative links so there is no need to change any drive letters or pathways as long as you keep all the folders under the parent directory (OFR_2006_1008) the same. You can also view the ArcGIS project directly from the DVD in read only mode by opening up pathway/USGS_1008.mxd. Requirements: you will need approximately 3 gigabytes of free space on your computer if you copy the data to your local drive.
If you do not have any GIS software:
You can still view all the data via ArcReader, a free mapping application distributed by ESRI Inc. You will need to download ArcReader and install it on your computer. Go to the ESRI Web site at http://www.esri.com/software/arcgis/arcreader/download.html and follow the directions for downloading and installing the free software. Once ArcReader is installed on your computer, you can either view the ArcReader project directly from the DVD by opening up [Your_DVD_drive]/gis/OFR_2006_1008/ofr2006_1008.pmf or copy the parent folder gis/OFR_2006_1008 to your local computer as described in the section above.
If you have ArcView 3.x:
If you ArcView 3.x and the spatial analyst extension you can access the shapefiles, grids and image layers (in ESRI grid or tif format) for this project. A description of the rasters and their location on the DVD are provided below in section A1.2. You can also download the locations of sediment samples and bottom photographs in Excel spreadsheet format. These can be added to ArcView as and event theme.
The JPG images of the bottom photographs and seismic reflection profiles can be accessed and viewed directly from the DVD or via the Web page. They are located in the following folder: [Your_DVD_drive]/gis/OFR_2006_1008/images/hotlinked_photos/.