Bronze level automatically awarded US beta

This data has achieved Bronze level on 22 October 2015 which means this data makes a great start at the basics of publishing open data.

Depth (Mean) Layer used to identify, delineate and classify moderate-depth benthic habitats around St. John, USVI

Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Release Date
26 September 2015
Modified Date
26 September 2015
Update Frequency
asNeeded
Publishers
National Oceanic and Atmospheric Administration, Department of Commerce
Identifier
depth-mean-layer-used-to-identify-delineate-and-classify-moderate-depth-benthic-habitats-around
Landing Page
http://catalog.data.gov/dataset/depth-mean-layer-used-to-identify-delineate-and-classify-moderate-depth-benthic-habitats-around
Temporal Coverage
18 February 2004 — 12 February 2005

Community verification

Other people can verify whether the answers on this certificate are correct.

This certificate is automatically awarded.

Sign in to verify or report this certificate

Description

Mean depth was calculated from the bathymetry surface for each cell using the ArcGIS Spatial Analyst Focal Statistics "Mean" parameter. Mean depth represents the average depth value (in meters) within a square 3x3 cell window. The 2x2 meter resolution mean depth GeoTIFF was exported and added as a new map layer to aid in benthic habitat classification. Acoustic imagery was acquired for the VICRNM on two separate missions onboard the NOAA ship, Nancy Foster. The first mission took place from 2/18/04 to 3/5/04. The second mission took place from 2/1/05 to 2/12/05. On both missions, seafloor depths between 14 to 55 m were mapped using a RESON SeaBat 8101 ER (240 kHz) MBES sensor. This pole-mounted system measured water depths across a 150 degree swath consisting of 101 individual 1.5 degree x 1.5 degree beams. The beams to the port and starboard of nadir (i.e., directly underneath the ship) overlapped adjacent survey lines by approximately 10 m. The vessel survey speed was between 5 and 8 kn. In 2004, the ship's location was determined by a Trimble DSM 132 DGPS system, which provided a RTCM differential data stream from the U.S. Coast Guard Continually Operating Reference Station (CORS) at Port Isabel, Puerto Rico. Gyro, heave, pitch and roll correctors were acquired using an Ixsea Octans gyrocompass. In 2005, the ship's positioning and orientation were determined by the Applanix POS/MV 320 V4, which is a GPS aided Inertial Motion Unit (IMU) providing measurements of roll, pitch and heading. The POS/MV obtained its positions from two dual frequency Trimble Zephyr GPS antennae. An auxiliary Trimble DSM 132 DGPS system provided a RTCM differential data stream from the U.S. Coast Guard CORS at Port Isabel, Puerto Rico. For both years, CTD (conductivity, temperature and depth) measurements were taken approximately every 4 hours using a Seabird Electronics SBE-19 to correct for the changing sound velocities in the water column. In 2004, raw data were logged in .xtf (extended triton format) using Triton ISIS software 6.2. In 2005, raw data were logged in .gsf (generic sensor format) using SAIC ISS 2000 software. Data from 2004 were referenced to the WGS84 UTM 20 N horizontal coordinate system, and data from 2005 were referenced to the NAD83 UTM 20 N horizontal coordinate system. Data from both projects were referenced to the Mean Lower Low Water (MLLW) vertical tidal coordinate system. The 2004 and 2005 MBES bathymetric data were both corrected for sensor offsets, latency, roll, pitch, yaw, static draft, the changing speed of sound in the water column and the influence of tides in CARIS Hips & Sips 5.3 and 5.4, respectively. The 2004 data was then binned to create a 1 x 1 m raster surface, and the 2005 data was binned to a create 2 x 2 m raster surface. After these final surfaces were created, the datum for the 2004 bathymetric surfaces was transformed from WGS84 to NAD83 using the "Project Raster" function in ArcGIS 9.1. The 2004 surface was transformed so that it would have the same datum as the 2005 surface. The 2004 bathymetric surface was then down sampled from 1 x 1 to 2 x 2 m using the "Resample" function in ArcGIS 9.1. The 2004 surface was resampled so it would have the same spatial resolution as the 2005 surface. Having the same coordinate systems and spatial resolutions, the final 2004 and 2005 bathymetry rasters were then merged using the Raster Calculator function "Merge" in ArcGIS's Spatial Analyst Extension to create a seamless bathymetry surface for the entire VICRNM area south of St. John. For a complete description of the data acquisition and processing parameters, please see the data acquisition and processing reports (DAPRs) for projects: NF-04-06-VI and NF-05-05-VI (Monaco & Rooney, 2004; Battista & Lazar, 2005).

Información General

Información legal

This dataset has been created by US Government which means it is required to be in the public domain. However US copyright law only allows open access by US citizens, we have assumed the data is equivalently licensed as CC0 for the rest of the world as this is in the spirit of the US Government’s Open Data policy.

  • La declaración sobre derechos está en

    http://catalog.data.gov/dataset/depth-mean-layer-used-to-identify-delineate-and-classify-moderate-depth-benthic-habitats-around Do you think this data is incorrect? Let us know

  • Under which licence can people outside the US reuse this data?

    CCZero Creative Commons Do you think this data is incorrect? Let us know

  • Existen

    yes, and the rights are all held by the same person or organisation Do you think this data is incorrect? Let us know

  • El contenido se encuentra disponible bajo

    CCZero Creative Commons Do you think this data is incorrect? Let us know

  • Estos datos contienen

    Ningún dato sobre individuos Do you think this data is incorrect? Let us know

Información práctica

  • Los datos aparecen en esta colección.

    http://catalog.data.gov/organization/noaa-gov Do you think this data is incorrect? Let us know

  • La precisión o la relevancia de estos datos

    Expiran pero están temporalizados Do you think this data is incorrect? Let us know

  • Los datos están

    Respaldo fuera del sitio Do you think this data is incorrect? Let us know

Información técnica

Información social

  • La documentación incluye datos legibles por máquina para

    Título Do you think this data is incorrect? Let us know

  • La documentación incluye datos legibles por máquina para

    Descripción Do you think this data is incorrect? Let us know

  • La documentación incluye datos legibles por máquina para

    Identificador Do you think this data is incorrect? Let us know

  • La documentación incluye datos legibles por máquina para

    Página de destino Do you think this data is incorrect? Let us know

  • La documentación incluye datos legibles por máquina para

    Frecuencia de liberación Do you think this data is incorrect? Let us know

  • La documentación incluye datos legibles por máquina para

    Editor Do you think this data is incorrect? Let us know

  • La documentación incluye datos legibles por máquina para

    Distribución Do you think this data is incorrect? Let us know

  • La documentación incluye datos legibles por máquina para

    Fecha de lanzamiento Do you think this data is incorrect? Let us know

  • La documentación incluye datos legibles por máquina para

    Fecha de modificación Do you think this data is incorrect? Let us know

  • La documentación incluye datos legibles por máquina para

    Cobertura temporal Do you think this data is incorrect? Let us know

  • La documentación incluye datos legibles por máquina para

    Cobertura espacial/geográfica Do you think this data is incorrect? Let us know

  • La documentación acerca de cada distribución incluye datos legibles por máquina para

    Fecha de lanzamiento Do you think this data is incorrect? Let us know

  • La documentación acerca de cada distribución incluye datos legibles por máquina para

    Un URL para acceder a los datos Do you think this data is incorrect? Let us know

  • La documentación acerca de cada distribución incluye datos legibles por máquina para

    Un URL para descargar la base de datos Do you think this data is incorrect? Let us know

  • Encuentre la manera de contactar a alguien sobre estos datos en

    http://catalog.data.gov/dataset/depth-mean-layer-used-to-identify-delineate-and-classify-moderate-depth-benthic-habitats-around Do you think this data is incorrect? Let us know

  • Encuentre cómo sugerir mejoras a una publicación en

    http://www.data.gov/issue/?media_url=http://catalog.data.gov/dataset/depth-mean-layer-used-to-identify-delineate-and-classify-moderate-depth-benthic-habitats-around Do you think this data is incorrect? Let us know

Create a certificate

Don't have an account?

Don't worry, you can register later to save your work.

Create an account