Title
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Canyon geomorphic feature layer |
Date
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2013-06-05 |
Date type
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Creation: Date identifies when the resource was brought into existence
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Date
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2014-02-14 |
Date type
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Publication: Date identifies when the resource was issued
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Edition
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Version 1 |
Code
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ef7dcda8-2811-4ca6-ba52-8b03688b9347 |
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Presentation form
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Digital map: Map represented in raster or vector form
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Abstract
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The canyon geomorphic feature layer represents the spatial extent of the canyons of the worlds oceans based on interpretation
of the SRTM30 plus v7 global bathymetry model. The layer is one of the 25 layers that make up the global seafloor geomorphic
features map (Harris et.al. 2014). Submarine canyons are defined as “steep-walled, sinuous valleys with V-shaped cross sections,
axes sloping outward as continuously as river-cut land canyons and relief comparable to even the largest of land canyons”(Shepard,
1963). “Large”canyons were mapped in this study based on the definition of Harris and Whiteway (2011), which requires canyons
to extend over a depth range of at least 1,000 m and to be incised at least 100 m into the slope at some point along their
thalweg. Canyon mapping in this study was based on a combination of automated and expert interpretation of the SRTM30PLUS
model.
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Purpose
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The canyon geomorphic feature layer represents the spatial extent of the canyons of the worlds oceans based on interpretation
of the SRTM30 plus v7 global bathymetry model. The layer is one of the 25 layers that make up the global seafloor geomorphic
features map (Harris et.al. 2014). The global seafloor geomorphic features map is intended to support ocean management including
feature inventories, spatial planning and biodiversity conservation.
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Credit
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The global seafloor geomorphic features map has been produced through a collaboration between Geoscience Australia, GRID-Arendal
and Conservation International. Reference: Harris et. al. (2014) Geomorphology of the oceans.Marine Geology (in Press)
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Maintenance and update frequency
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Irregular: Data is updated in intervals that are uneven in duration
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Descriptive keywords
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Geology (theme). |
Descriptive keywords
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global (place). |
Descriptive keywords
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seafloor, geomorphic features, habitats (theme). |
Descriptive keywords
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Downloadable Data . |
Use limitation
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The global seafloor geomorphic feature map is available for download from bluehabitats.org |
Access constraints
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Other restrictions: Limitation not listed
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Other constraints
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no limitations |
Spatial representation type
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Vector: Vector data is used to represent geographic data
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Character set
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UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646
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Topic category code
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Oceans |
Environment description
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Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.4.4000 |
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