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Backscatter A [8101]--Offshore of Bodega Head, California
Shrnutí
- Co poskytovatel nabízí?
- a one-off release of a single dataset
- Databázová licence
- Nevztahuje se
- Licence na obsah
- Creative Commons CCZero
- Způsob ověření
- ověřený automaticky
- Datum vydání
- 3 February 2015
- Datum poslední změny
- 3 February 2015
- Četnost aktualizací
- asNeeded
- Vydavatel
- U.S. Geological Survey, Department of the Interior
- Identifier
- backscatter-a-8101-offshore-of-bodega-head-california
- Landing Page
- http://catalog.data.gov/dataset/backscatter-a-8101-offshore-of-bodega-head-california
- Časové rozpětí
- 1 January 2007 — 1 January 2010
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Popis
This part of DS 781 presents data for the acoustic-backscatter map of the Offshore of Bodega Head map area, California. Backscatter data are provided as separate grids depending on mapping system or processing method. The raster data file is included in "BackscatterA_8101_OffshoreBodegaHead.zip", which is accessible from http://pubs.usgs.gov/ds/781/OffshoreBodegaHead/data_catalog_OffshoreBodegaHead.html. The acoustic-backscatter map of the Offshore of Bodega Head map area, California, was generated from backscatter data collected by California State University, Monterey Bay (CSUMB), and by Fugro Pelagos. Mapping was completed between 2007 and 2010, using a combination of 200-kHz and 400-kHz Reson 7125, and 244-kHz Reson 8101 multibeam echosounders, as well as 468-kHz SEA SWATHPlus interferometric system. These mapping missions combined to collect backscatter data (sheet 3) from about the 10-m isobath to beyond the 3-nautical-mile limit of California State Waters. Within the acoustic-backscatter imagery, brighter tones indicate higher backscatter intensity, and darker tones indicate lower backscatter intensity. The intensity represents a complex interaction between the acoustic pulse and the seafloor, as well as characteristics within the shallow subsurface, providing a general indication of seafloor texture and composition. Backscatter intensity depends on the acoustic source level; the frequency used to image the seafloor; the grazing angle; the composition and character of the seafloor, including grain size, water content, bulk density, and seafloor roughness; and some biological cover. Harder and rougher bottom types such as rocky outcrops or coarse sediment typically return stronger intensities (high backscatter, lighter tones), whereas softer bottom types such as fine sediment return weaker intensities (low backscatter, darker tones). These data are not intended for navigational purposes.
Obecné informace
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Dokumentace
http://catalog.data.gov/dataset/backscatter-a-8101-offshore-of-bodega-head-california Do you think this data is incorrect? Let us know
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Poskytovatel
U.S. Geological Survey, Department of the Interior Do you think this data is incorrect? Let us know
Právní informace
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Právní prohlášení
http://catalog.data.gov/dataset/backscatter-a-8101-offshore-of-bodega-head-california Do you think this data is incorrect? Let us know
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Under which licence can people outside the US reuse this data?
Creative Commons CCZero Do you think this data is incorrect? Let us know
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Obsah chráněný autorským právem
yes, and the rights are all held by the same person or organisation Do you think this data is incorrect? Let us know
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Licence obsahu
Creative Commons CCZero Do you think this data is incorrect? Let us know
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Ochrana soukromí
nehraje roli, data se netýkají fyzických osob Do you think this data is incorrect? Let us know
Praktické informace
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Relevantní datové katalogy
http://catalog.data.gov/organization/usgs-gov Do you think this data is incorrect? Let us know
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Zastarávání
data časem zastarají, ale mají časové razítko Do you think this data is incorrect? Let us know
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Zálohování dat
data jsou zálohována offsite Do you think this data is incorrect? Let us know
Technické informace
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URL datové sady
http://pubs.usgs.gov/ds/781/ Do you think this data is incorrect? Let us know
Sociální informace
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Strojově čitelná metadata
název Do you think this data is incorrect? Let us know
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Strojově čitelná metadata
popis Do you think this data is incorrect? Let us know
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Strojově čitelná metadata
hlavní URL Do you think this data is incorrect? Let us know
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Strojově čitelná metadata
URL dokumentace Do you think this data is incorrect? Let us know
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Strojově čitelná metadata
četnost aktualizací Do you think this data is incorrect? Let us know
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Strojově čitelná metadata
poskytovatel Do you think this data is incorrect? Let us know
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Strojově čitelná metadata
distribuce Do you think this data is incorrect? Let us know
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Strojově čitelná metadata
datum vydání Do you think this data is incorrect? Let us know
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Strojově čitelná metadata
datum poslední změny Do you think this data is incorrect? Let us know
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Strojově čitelná metadata
související časové období Do you think this data is incorrect? Let us know
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Strojově čitelná metadata
související geografické území Do you think this data is incorrect? Let us know
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Strojově čitelná metadata k distribucím
datum vydání Do you think this data is incorrect? Let us know
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Strojově čitelná metadata k distribucím
URL pro přístup k datům Do you think this data is incorrect? Let us know
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Strojově čitelná metadata k distribucím
URL datové sady Do you think this data is incorrect? Let us know
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Kontakty
http://catalog.data.gov/dataset/backscatter-a-8101-offshore-of-bodega-head-california Do you think this data is incorrect? Let us know
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Zpětná vazba k publikovaným datovým sadám
http://www.data.gov/issue/?media_url=http://catalog.data.gov/dataset/backscatter-a-8101-offshore-of-bodega-head-california Do you think this data is incorrect? Let us know