| Index |
| Abstract |
| Introduction |
| Survey Overview and Acquisition |
| Data Processing |
| Error Analysis |
| Survey Products |
| Data Downloads |
| Logs |
| Abbreviations |
| References Cited |
Data Downloads
The bathymetry grid (DEM) is presented in GeoTiff format and can be opened directly in Esri ArcGIS 10.0 or higher. The map documents and shapefiles in this report were created in Esri ArcGIS 10.1 and can be found in the GIS Project folder. To open this folder in Esri ArcGIS, right-click and choose "Save As". The folder contains the .mxd file and all associated vector and raster data. The data layers may also be viewed using the free GIS viewer ArcGIS Explorer (http://www.esri.com/software/arcgis/explorer).
| Preview | File Description | File Format | Download File | Metadata |
|---|---|---|---|---|
 |
Esri ArcGIS project |
Esri files | 13CCT04_GIS.zip (673 MB) | Included with download |
|
Bathymetry DEM 50-m cell size |
GeoTIFF 32-bit floating point |
13CCT04_IFB_50_WGS84_G1150_MLLW_DEM.zip (0.353 MB) | Included with download | |
 |
Interferometric Backscatter Mosaic |
GeoTIFF 32-bit floating point |
13CCT04_IFS_01_ITRF05.zip (244 MB) | Included with download |
 |
Sidescan Sonar Mosaic |
GeoTIFF 32-bit floating point |
13CCT04_SSS_01_ITRF05.zip (89.3 MB) |
Included with download |
 |
Swath samples 2-m BASE resolution | ASCII | 13CCT04_IFB_xyz.zip (330 MB) | Included with download |
| Tracklines | Esri shapefile | 13CCT04_IFB_tracklines.zip (1.89 MB) | Included with download |
A Note on Coordinate Systems
WGS84 and NAD83 have been revised several times resulting in coordinate shifts of as much as several meters in x, y, and z. The revision is indicated by the designator following the name (G1150 following WGS84, for example). Care should be taken using software that does not distinguish between the different datum versions; lack of designator is a warning sign that software does not support three-dimensional (3D) datum shifts properly. Users should pay particular attention to the accompanying metadata files to ensure that the data are properly georeferenced. In particular, note that most current GIS software (including ArcGIS 10.1) cannot properly transform high-resolution elevation data from one 3D datum to another (such as WGS84 G1150 to NAD83 CORS96) without introducing errors on the order of 1 meter (m) to 2 m in x, y, and z.
The data in this report are provided in WGS84 UTM zone 16 for the horizontal component and MLLW for the vertical component. A tide zone model created by NOAA was applied and verified with six minute water level data for the vertical component. The transformations for the horizontal component from ITRF2005 to WGS84 were converted using NOAA's VDatum tool (http://vdatum.noaa.gov/).