Online Links:
Online Links:
| Range of values | |
|---|---|
| Minimum: | 55.4989269 |
| Maximum: | 61.1396275 |
| Units: | Decimal degrees |
| Range of values | |
|---|---|
| Minimum: | -156.22258 |
| Maximum: | -134.22158 |
| Units: | Decimal degrees |
| Range of values | |
|---|---|
| Minimum: | 18920101 |
| Maximum: | 20111231 |
| Units: | Calendar dates |
| Formal codeset | |
|---|---|
| Codeset Name: | Sediment type from NOS smooth sheets published from 1892 to 2001 and archived at NGDC |
| Codeset Source: | NOS smooth sheets published from 1892 to 2001 and archived at NGDC |
| Formal codeset | |
|---|---|
| Codeset Name: | Sediment Type from NOS smooth sheets published from 1892 to 2001 and archived at NGDC |
| Codeset Source: | NOS smooth sheets published from 1892 to 2001 and archived at NGDC |
USGS and NOAA appreciate the assistance of Kalei Shotwell and Chris Rooper (both NOAA) and Jennifer Reynolds (University of Alaska, Fairbanks, AK) in providing funding to the USGS to complete the project, and of Mega Prescott (NOAA) and Paul Waiters, Sara Kaiser, and Blake McBride (all University of California, Santa Cruz) who assisted with the digitization and proofing process
In 2012, U.S. Geological Survey (USGS) and National Oceanic and Atmospheric Administration (NOAA) embarked on an ambitious project to digitize surficial seafloor data from existing National Ocean Service (NOS) smooth sheets in the Gulf of Alaska including numerous bays bordering the Gulf. USGS and NOAA are using the data for the nation-wide usSEABED (http://walrus.wr.usgs.gov/usseabed) project that seeks to compile and unify existing seafloor characterization point data into GIS-friendly data using the dbSEABED program (Jenkins, 1997; Reid and others, 2005; Buczkowski and others, 2006; Reid and others, 2006) and for the North Pacific Research Board’s Gulf of Alaska Integrated Ecosystems Research Program (NPRB, GOA-IERP, http://www.nprb.org/gulf-of-alaska-project) juvenile groundfish survival project. In addition, NOAA “Deepwater Sponges and Corals” project uses these data to predict viable habitat for those species. Smooth sheets are available through the National Geophysics Data Center’s online data portal (NDGC, http://www.ngdc.noaa.gov). Data on smooth sheets hold densely packed data including surficial seafloor character that variably includes: rockiness, hardness/softness, sediment size, color, and constituents; as well as navigational hazards including anthropogenic sites or remains, rocky reefs, and areas of kelp or sea grass.
References: Buczkowski, B.J., Reid, J.A., Jenkins, C.J., Reid, J.M., Williams, S.J., and Flocks, J.G., 2006, usSEABED: Gulf of Mexico and Caribbean (Puerto Rico and U.S. Virgin Islands) offshore surficial sediment data release: U.S. Geological Survey Data Series 146, version 1.0, available at http://pubs.usgs.gov/ds/2006/146/. Jenkins, C.J., 1997, Building offshore soils databases: Sea Technology, v. 38, p. 25-28. Reid, J.A., Reid, J.M., Jenkins, C.J., Zimmermann, M., Williams, S.J., and Field, M.E., 2006, usSEABED: Pacific Coast (California, Oregon, Washington) offshore surficial-sediment data release: U.S. Geological Survey Data Series 182, version 1.0., available at http://pubs.usgs.gov/ds/2006/182/. Reid, J.M., Reid, J.A., Jenkins, C.J., Hastings, M.E., Williams, S.J., and Poppe, L.J, 2005, usSEABED: Atlantic coast offshore surficial sediment data release: U.S. Geological Survey Data Series 118, version 1.0., available at http://pubs.usgs.gov/ds/2005/118/.
Are there legal restrictions on access or use of the data?Access_Constraints: none
Use_Constraints:USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. This information is not intended for navigation purposes.
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
| Data format: | zip file contains the interpreted point shapefile and associated metadata in format shapefile (version ArcGIS 10.1.1) Esri point shapefile Size: 5 |
|---|---|
| Network links: |
https://www.sciencebase.gov/catalog/item/5eea53fd82ce3bd58d855794?facet=GulfofAlaskaDigitizationProject_NOSSeafloorCharacter.zip https://www.sciencebase.gov/catalog/item/5eea53fd82ce3bd58d855794 https://doi.org/10.5066/F7CV4FT9 |
| Data format: | csv file contains the interpreted point data in format comma-delimited text (version ArcGIS 10.1.1) comma-delimited text file Size: 7.2 |
|---|---|
| Network links: |
https://www.sciencebase.gov/catalog/item/5eea53fd82ce3bd58d855794?name=GulfofAlaskaDigitizationProject_NOSSeafloorCharacter.csv https://www.sciencebase.gov/catalog/item/5eea53fd82ce3bd58d855794 https://doi.org/10.5066/F7CV4FT9 |
The shapefile can be viewed with ESRI ArcGIS or other GIS software. The .csv file may be read by Excel or any standard spreadsheet program.
