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.

Alaska Geoid Heights (GEOID96)

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Release Date
26 September 2015
Modified Date
26 September 2015
Update Frequency
irregular
Publishers
National Oceanic and Atmospheric Administration, Department of Commerce
Identifier
alaska-geoid-heights-geoid96
Landing Page
http://catalog.data.gov/dataset/alaska-geoid-heights-geoid96

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

This 2' x 4' geoid height grid for Alaska is distributed as a GEOID96 model. The computation used 1.1 million terrestrial and marine gravity data held in the National Geodetic Survey gravity data base in July 1996 These data were augmented by gravity data contributions from NGA (former National Imagery and Mapping Agency (former Defence Mapping Agency)). By means of a Fast Fourier Transform (FFT) technique, high frequency corrections were made to an underlying EGM96 geopotential model through a remove, compute, and restore process. The gravity values are based on the International Gravity Standardization Net 1971 (IGSN71). The geoid heights are referred to the Geodetic Reference System 1980 (GRS80) ellipsoid. Unlike the grid for the conterminous United States, this GEOID96 grid does not incorporate GPS on leveled benchmarks. This model is a gravimetric geoid in a geocentric, ITRF94(1996.0) reference frame. It is necessary to subtract 12.0 cm from these values to obtain the geoid undulation between the best-fit global geopotential surface and the GRS80 ellipsoid (both expressed in a tide free system). Additional information is available at: http://www.ngs.noaa.gov/GEOID/geoid.html We are particularly grateful to NGA (former National Imagery and Mapping Agency) for their assistance and their data contributions.

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/alaska-geoid-heights-geoid96 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

  • Estos datos cambien

    no 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/alaska-geoid-heights-geoid96 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/alaska-geoid-heights-geoid96 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